Designing a Nuclear Fallout Shelter

What does a nuclear fallout shelter actually look like? I had no idea, and so I did some research. Wikipedia covers the basics, but what I was really after were floor plans.

Unfortunately, there seem to be only two types of solution: Tiny home shelters with space for a handful of people for a few days, and huge cold-war era billion dollar projects built to shelter entire governments. There are a few exceptions, medium-sized bunkers built by wealthy individuals, but there is very little information about them available. As for floor plans… I found for pretty much nothing.

So I resorted to what I always do when I can’t (or don’t want to) find the genuine thing, I made a nuclear fallout shelter up from scratch. Please note that this is not supposed to be a design that “could actually work”, it’s just a baseline to have a consistent setting for the beginning of my NaNoWriMo 2008 novel.

A private fallout shelter would have to sustain its occupant for a minimum of two days, which some authorities consider the earliest acceptable time to leave a shelter at all, and only for evacuation to safer areas. The fall-out shelter would remain closed for two to three weeks – it would still be used for sleeping afterwards, but it seems to be the consensus that working outside is safe after 2-3 weeks.

The shelter would be built underground to provide the best possible protection from radiation. It’s designed as a safe refugee and fall out shelter, and less as a blast shelter.

Here’s a very rough floor plan design for the nuclear shelter:

The scale is probably a little off, and with the beds being bunk beds, ie. for two persons each, the shelter’s maximum of 18 occupants may require larger space for storage and sanitary necessities. Since bigger bunkers are a lot more costly, the shelter would be still as small as feasible, and occupants will be expected to stay in their bunks a lot of the time.

The rooms are not very high – I assume 2m ceiling height at the most.


I am not entirely sure how such a fallout shelter would handle water storage and waste disposal. I am assuming it uses a septic tank to dispose of excrements. Packaging won’t pose a problem, because everything that is consumed in the shelter has to be stored in the shelter when it is sealed anyway.


For the water supply, the shelter would likely have a large water tank and/or a pump to drain water from underground sources. 18 adult males, staying in the shelter for two weeks, would require over 930 liters of water just for drinking. Showers use anything between 4 and 12 liters per minute. The military recommends a minimum of one change of uniform and one shower per week to maintain health.

Shower water can be recycled to an extent; not only for flushing toilets, but there are actually techniques where a part of water used to shower once is recycled and used instead of fresh water for the next shower. Let’s assume 10 liters of water for this purpose, per person and week. I am not sure how to quantify water for cooking, but presumably this could be very little by using MRE’s. In total this works out to less than two cubic meters of water for two weeks, if I made no big mistake in my assumptions. Two cubic meters is something you can comfortably store, even if you double the capacity for safety and luxury. Even with a pump / well, the bunker would still store several day’s worth of water at least to cover for emergencies.

Since this particular bunker is located in the outskirts of a large city I am assuming a well is not practical.

Nuclear Fallout Shelter

Entrances and Exits

The airlock pictured in the floor plan is not something I envision as a “true” space-ship type airlock, but rather a way to minimize contamination of the inside – if a single door opens directly into the bunker, the wind is likely to blow particles inside. The outer door is much stronger than the inner one.

There is a small emergency exit on the other side of the shelter. It is not usable to bring equipment into or out of the bunker, and will only be used by the occupants to escape in case the main entrance becomes blocked.


The bunker’s energy is generated by a small diesel generator in a back room. The same room will have an exhaust to the outside. The ventilation system could be hand-powered in an emergency.


A battery-powered emergency lighting system serves as a back-up to prevent people stumbling for their flashlights in total darkness; besides, that same total darkness in an enclosed space could quickly lead to panic.

Other equipment

Naturally the bunker is equipped with Geiger counters, both actual Geiger counters capable of measuring small amounts of radiation, as well as civil defense radiological survey meters. There are hand-portable units as well as as units mounted outside.

There is a gasmask for every occupant.

Each room has a fire extinguisher and dual smoke detectors / CO detectors.

The shelter has a tv and a radio (with above ground antenna) in the main room, and ham radio in the generator room (not in the main room because communication may need to be private or censored).

It has a telephone line – expected to stop working in any real emergency, but the effort of adding it in is minimal and the possible benefit huge. It is also a convenience while the bunker is not in actual use.

Since they are small and incredibly useful, the bunker stores a couple of cheap notebook computers – if nothing else, video games and digital books can keep the occupants entertained. The shelter also has a selection of hard-copy books, both fiction and non-fiction “”how-to” style books.

The generator room is also equipped with a small work bench and stores a full set of tools and spare parts and materials.

Equipment is disconnected when not in use, and Faraday cages are used to protect some equipment against an EMP – just in case.

Anything else?

If I forgot something that I need for story purposes, it’ll be easy to add it in later. And if you think there’s something essentially wrong with the design… well, feel free to comment! It doesn’t have to be an actual working design, but it doesn’t hurt to flesh this out more, so others can use it for their own gaming or writing.

30 thoughts on “Designing a Nuclear Fallout Shelter

  1. Realize that for a fallout shelter to work, it must be "overpressured" which means that the filtered air supply which comes from an external source must so pressurize the room that any air seeking to enter the room from non filtered sources (cracks, outlets etc.) would be pushed back by the internal pressure in the room.

    With that said, to have a diesel powered engine to create power could lead to a breach in the envelope. I agree that it is far better to have a generator for electricity, but it must be so planned with an overpressure valve on the exhaust portal so that the negative pressure after a NBC event would not suction out all of the oxygen; killing the inhabitants.

  2. I am not really sure that is very important for a fallout shelter. The main purpose seems to be to shield the inhabitants from radiation, I am not convinced the fallout particles would enter through minuscule cracks. Certainly you will want to avoid contamination of the interior. A private fallout shelter would most likely make compromises – a shelter as detailed in the floor plan is probably already extremely expensive. If you do have any professional insight into this, or good source links, I'd love to be educated on the matter of course.

    The pressure valves for the exhaust of the generator are an excellent point though. As written in my story, the shelter would not only have to serve as a fallout shelter but also as a blast shelter, and that would require such precautions. I am wondering how susceptible the generator itself would be to damage from pressure differences. It might be feasible to simply keep it outside the "secured" part of the bunker.

  3. You would definitely want over/under pressure protection valves. Many so-called bomb shelters that are available actually double as NBC (nuclear, biological, chemical) shelters. Along with hermetic seals at all doors, as well as filters for all air, overpressuring a shelter is the easiest way to keep contaminants out of the shelter.
    Also, your design, while very well thought out, is illogical. With so many corners, blast pressure differentials will have a much higher chance of destroying your shelter. I would suggest having the generator room accessible through the air lock, to ease re fueling, maintenance, etc.

  4. doug is right that any particles that enter from outside would be contaminated. it is illogical to build a bomb shelter that is meant to shield from radiation if you are going to let it in through every crack. Also the air filtration system would most likely be the most expensive system in the shelter. again, you can not pull in radio active air. it would have to basically filter out all but pure O2. (difficult). Also unless your planing on taking close hit. (im guessing your not because even with 20ft of concrete the shelter would be toast) i would think about investing in a small battery bank. 4 -6 deep cycle batteries. (golf cart batteries) and 2 medium sized solar panels and an inverter+charge controller. solar mounted out side would supply energy without fuel usage and with no movable parts that could break.

  5. to Chicago: Good idea, but it would be smart to have those solar panels in a military grade Faraday enclosure (large metal box, hermetically sealed w/copper gaskets) that is not grounded. Also, you have to contend with inverters, etc. Better idea to have a larger battery bank, and a diesel battery charger. Also, a smaller battery bank to run a few lights for the hour or two period when the bank needs charging.

    Also, as far as emergency rations go, don't choose MRE's. Instead, pick the longest possible duration to stay (about 3 months), and buy those vaccuum sealed mayday bars (in 1200, and 3600 calorie bars). At 1200 calories per day, everyone would have enough energy to exercise (calisthenics, etc), and the rations come in (I believe) 400 calorie blocks, leaving the option of rationing for longer periods.
    Another thing… You may want to build a shelter out of reinforced concrete, but look into the reinforcing materials they are beginning to use in San Francisco, to reinforce older brick buildings. It goes on like wallpaper, but actually allows brick structures to be more "flexible", and "bend" with the force of a blast, or earthquake, without ruining its structural integrity. I used to have the link, but my old computer harddrive died.

  6. The creativity and insight you put into your floor plan is interesting but highly impractical. Firstly, this is meant as a short term survival solution, so although comfort is important for peoples sanity, it is unnecessary in practice. The bathroom could be integrated with the shower room and all the bunk rooms should be combined. Of course, this is all academic, even with the best floor plan, you need to concentrate on the reinforcement of the roof. This has to be sturdy enough not only to support the weight of the roof but also the ground cover on top of it. Realistically, there is no way for a civilian to harden the shelter against the blast from a detonation of a nuclear weapon without a huge bank account and attracting some attention, but as a fallout shelter its fairly easy, just make sure you're outside any potential target blast zones!

  7. hi,

    this is a grate idea…
    with terrorists looking for russian nukes locked away in old barns and nort koria looking offencive this is brilliant.

    i mean locked up with you family is fine if your a loner and some extremly rash.

    why not save your friends aswell.

    ok sorry about that little intro. for a fallout shelter you need a polt of land where you and all your mates can get to within two to three minuets adverage warning time for a missile. you can build the bunker within a week if threats rise quickly.

    list of what i would have:

    room up to 36 people to sleep
    kitchen using hydrogen gas (easy to produce)
    food for two year max including plants for extra food production
    enough water for two years plus five stage water filtration
    hydrogen powered genorator
    dinning area
    wrighting desks
    air filtration system
    radio/music player
    computers (setup network)
    games room
    swimming pool
    heating, coal, oil , gas, hydrogen
    board games
    games consoles
    valubles metals (don't worry you will not be the only survivers so store cashs as something valuble paper money if worth nothing especiale after an attack)

    becuase not everyone you love and care for can fit in because of the buget…

    make sure there are more shelters within one hundered meters.

    after attack>

    send out radio signals after two days.
    from the air lock send up flares after two weeks every two hours (possible automatic rig)

    after six months turn to ground above every two days to eliminate radiation plus flus out with water. one year later plant crops trees ect…

    by year two radiation should be gone and resonable food production should be avalible

  8. One thing you overlooked is that radiation does not stop when it hits a door, airlock, or wall.

    Your entryway needs to be at a right angle to the structure itself.

    The design above would funnel the radiation into your shelter.

  9. I think the angled ramp idea is mostly a blast protection and not quite as much a radiation protection issue. If it faces towards the likely targets, an angled design makes a lot of sense because the blast wave would indeed get funneled down towards the shelter's door (and thus the door needs to withstand more pressure) and the earth does act as additional shielding against the initial gamma ray blast. If it's mostly a fallout shelter, the angle wouldn't make much of a difference – alpha/beta radiation shouldn't penetrate any kind of decent wall or door anyway.

    Thanks, all, for the suggestions, by the way – keep 'em coming!

  10. well there is one huge miscalculation you made in your design. the water, you would NEED an internal source of water, the design i once made consisted of two tanks similar to the ones used to store gasoline. an external source of water would be very contaminated even underground sources.

    plus, if you are thinking of making it suitable for 18+ people then i would add more storage room. or if you want it for less then i would remove one of the living quarters to add more room for storage. you have to think, people are going to be living down there for 3-4 months at LEAST. so, to have enough storage for all of them would be nessisary. not including storage for after you leave the area. so basically, you would need tools for rebuilding your homes, ways to farm (if that is even possible) guns and ammo (and lots of them) plus, maybe a second bunker to store a couple vehicles and lots of gas. plus, once you leave the bunker you can't expect to run into a stockpile of food and water. so that would be needed to plan into also.

    remember, if people are outside they will be trying to get in to save their own lives. so camouflage! (or if everyone in your neighborhood knows that you built a bunker that will not be necessary) so then you will need ways to "remove" the people that are trying to get in. i.e. gun ports, mines, and whatever you might think of. because, sooner or later they will get inside, and they might just kill you all. maybe a safe door (like the kind that is in banks, even though they are expensive) maybe you could engineer one on your own. maybe you could make a few bars of steel that could be places into the floor through angled holes that could be wedged into the door or the door frame. that would be helpful also. plus i would think about making the ramp very narrow. so that no one could drive a semi or a forklift or some vehicle into the door.

    i see alot of you are worried about radiation getting in. honestly earth is the best defense against radiation. as long as you are at least 50 feet underground then i think you will be ok.

    the ramp is really the only way you can bring things easily into the bunker. and still be safe from the first blast.

    while i am mentioning these things you might just be thinking $. but, honestly a couple 10,000 dollars isn't that much when you are thinking about your family and friend's lives.

  11. also i would think about renewable energy maybe some way to raise solar panels or maybe a windmill or maybe a hybrid of both. you will be using the energy all the time and i expect the generator to go down. not the mention the gas you will need to store to keep the generator going. also the noise would start to drive you nuts. in that confined of a place the noise would just bounce around.

  12. Supplementing the generator with renewables does make sense, if you have a lot fo space. Solar panels are getting more efficient, so especially in sunny areas (say California) they are probably a good idea; but they are outside and thus not protected well. You also can’t really hide them, if you want.

    This design is mostly a fallout shelter, and less of a bomb shelter. That is, it’s not expected to survive in close proximity to the blast, of course that’d be a bonus but it’s a HUGE engineering challenge. Alpha and beta radiation are blocked very easily, Gamma is the problem that you need a lot of shielding for. 50ft underground is quite expensive, I think as long as your bunker is covered with a few feet of earth it should be fine.

    The fallout from a nuclear blast is actually surprisingly short-lived. It should be reasonably safe to go outside after some weeks, say 1-2 months at most.

  13. just do some research, you might need more then a couple feet. there are some anti-radiation pills out there that are cheap. you might want to invest in some, it couldn't hurt. not sure if you have the money for them but there are also radiation suits, they are at least a grand each but it's better to over react then under react.

    so what is your take on the water problem and the security issue?

    well my idea for the renewable energy was to raise them from inside the bunker or outside after the blast is over with. maybe wearing the radiation suits i suggested.

  14. 1) Air is not radioactive, you don’t need to pressurize your shelter.
    2) Fallout is heavier than air as it is the debris picked up by the air rushing back into “Ground Zero” after the initial blast.
    3)Putting curves in your weak spots, the air shafts and entrances, will act like grease trap do and trap the fallout.
    4)Putting curves in your weak spots also adds to your must important safty precaution, Shielding”.
    5)”Shielding”, the more mass between you and fallout,
    which as the name implies “falls” “out” of the sky and lannds on surfaces just like all forms of dust, the safer you are.
    6)After the first 7hrs 90% of the radiation from a conventional bomb fades. BUT if you save your $ by not pressurizing and spending it on water, food, first aid, guns and ammo, AND SHIELDING and spare air filters you’ll live alot happier.
    7)300 rems in a hr is considered survivable with rapid intensive medical intervention. Yeah, like you’re going to find any after an explosion! But in a well supplied well SHIELDED shelter that drops to nothing and after 7hrs. outside decays to 30 on it’s own, after 14 days while you cann’t farm inside the 10mi blast radius for ten years you can contiue.

  15. Nils;

    I found your blog by accident by googling NaNoWriMo. Funny you’re thinking about something I’ve been goofing with for years.

    FWIW, CT has it about right. 🙂 Read “Nuclear War Survival Skills” by Cresson Kearney. Just about everything you need to separate the facts from the fiction is there. If you need a copy, email me. It’s an eBook in PDF format. Exhaustive, well-informed reading.

    A few other thoughts:

    1). Use geometry shielding (90 degree angles) to shield your door. Done properly, each 90 degree bend drops the incoming exposure by a factor of 10x. (Ie, one 90 deg bend takes a 300 rad/hr field down to 30 rad/hr). It also tends to break-up the shockwave if you do it right, and makes your door less vulnerable to blast debris and distant small-arms fire.

    2). Berm the entire structure. 3 feet of dirt all around and use of 12 inch thick concrete walls give a 1400:1 reduction in absorbed dose for your occupants.

    3). Consider using ICF’s (insulated concrete forms… Google it, Reward Wall Systems, Inc) for your wall structures. You can assemble these like Legos, add-in the code-required rebar, and fill them with concrete. The US Army tested a structure made with these against a simulated airburst nuclear device of 150 kt yield at a slant range of 3000 meters. It cracked slightly but did not yield. The simulated occupants survived nicely.

    4). Consider the effects of the EMP pulse in your planning. The super-efficient flourescent lamps and LEDS currently in vogue are poor survivors in an EMP event. Add-in some of the basic tried-and-true Edison bulbs as a fall-back.

    5). Consider moving the generator room. Decouple it from the main slab and give it it’s own isolated space. Two reasons: a). Noise and vibration. b). Fire resistance. Understand a diesel rig won’t be hurt by indirect blast pressure (just keep the debris from hitting it and keep the overpressure pulse under 20 psi) and it won’t care a bit about ultra-high radiation fields. So this critter can (and should) go into a bermed vault with a concrete cover displaced a few inches around the perimeter for ventilation. You can access this gen-pen from the main living area via a short tunnel with a blast door.

    6). If you plan on having self-generated power, you’ll need not only abundant fuel (diesel is ideal)… but a redundant / servicable power system. Design for accessibility and sustainability. Stock spare parts. Know how to trouble-shoot and repair everything quickly. Understand that any “modern” genny will have a brushless head and internal excition. Ditch this complexity for a “cheap” chinese head using a Z-winding feedback-excitation scheme. (You can fix it in less than 10 minutes once you understand how they work, and parts are cheap and universally available).

    7). Ventilation is the Achilles Heel of any shelter. Where I live, you couldn’t survive the heat/humidity of such a shelter for more than a few hours. Air movement, or air conditioning, is a requirement. Your current design doesn’t allow much, if any, cross-flow. You might want to work on this aspect.

    Looking forward to seeing what you submitted to NaNoWriMo!

  16. the answer to climate comfort is geothermal heat and cooling. its a heavy investment but CHEAP to run and keep running. plus, the need for combustion air is minimal.

    the 90 degree entry is spot on. radiation cant turn a corner easily. plus, worst case, its easy to defend if people try to force their way in.

    water storage can be put into a gray tank for reuse. it would be super keen if you could dig a well inside or next to your shelter. again, cheap to maintain and run. plus, the water will be as clean as any youll find provided the water table is deep enough. it would be easy to test as well.

  17. one point i wanted to mention was trash. what could you do with it? i don't expect too much.

    and no one has really thought of a good way to provide power.

  18. What trash? Its not like people can go shopping during the time spent…. items in the shelter will decrease in size as they are consumed. And solar will still work, or an excersize bike generator….

  19. Ah, i kinda see what you meant though, now that i searched around a bit- any waste could be burned alongside wood in a stove, i was thinking of somthing like a wood gas powered engine for power as well (2 birds 1 bomb)
    But not sure how wrappers etc would change gas… look up "gassifier" or "wood gas engine" if you want to see more… it was on The Colony tv show.

  20. I have been thinking of this issue for over 20y, First off the shelter needs to be 90 degrees from the entry to the shelter so that the blast wave will hit the back of the "air lock", not go in the shelter, because the nuclear in the blast wave does not move 90 degrees when the bomb goes up but the the dust will. And the shelter needs to be on springs so it can handle the ground shakes, this will help with earthquakes if any. Air intake has to be filtered so you do not have fallout coming in, outtake air needs to be mask so you do not have worry about your "friends" coming knocking, energy source needs to have batteries, the ones that I have found that can last up to 30y yes 30y not 10 to 15 but 30y are hub1 look online hub1 you can also have them sent without water in them so they can sit while you use a set for the first 30y then change out when needed, because if things do hit the fan you are not going to have ele on the pole. Your waste feeds the needs of the plants, a hydro system because the dirt will increase the c02, Plants will be food your choice of plants. And you can put jar food the kind that grandmother like to make they will last more then 20y on the shelf, you are not going the store to buy food after. canned food, jelly jars what ever you want to call it they are your source of protent along with peanut butter and have jello for your bones, the canned food can be fish or cow or chicken and vegges. Well water is best but if you can have a circle system for your water, in other words, go from gray water to pottable thru a plant filter to fish then other plants you end up with clean water I may not have all the steps but can also look online. You want a air filter that can handle bio, nuclear, chem and R/O water filtering system somthing that can go in poop water and come out clean not the ones that are less then 400 or 500 bucks, A good R/O can filter out bio,nuclear and chem the gov made them so you know that it must work. If you have a well then you can ele the water for hydrogen and o2, h can be used for gen then the o2 for you mix in the intake air, if you can not do those things then you can run veggy oil in a diesel gen so go to the fast food places and get to know the manager so you can get there oil store it and have rubbing al and baking soda stored aswell the three things go gether to make the diesel gen run just fine no need to store diesel. wind gen instead of the solar because if there dust in the air the solar will no work that well let alone if the sun is block for months. When I 16 I thought that if you get lighting store that could be let out by a control way that would work for power. P.S. you may want to stay in your "home" for a long time, because there will be a lot of dead people and the smell, not to mention the towns will be all over, not a sight that you want to see every day then think about being a swinger so you don't get dored with your parter because you are going to be in your "home" for a long time in close, And you have people to help with buying of your needs to get it done quickly.
    If want to email me about this, I am looking for parters in underground home, swingers part, only good looking women please, my wife does not know I am writting this so do not tell her she'll kill me,

  21. Very interesting subject. Been reading everything I can find on it for pass 25 years. The book Nuclear War Survival Skills is best information I found so far. Ramp a bad ideal, Blast wave would be funnel right to it. Solar panel and electronics with Semiconductor would have to be sheilded by Faraday cage to survive EMP event. Diesel generator is your best bet and a bank of batteries. All vent and exhaust would need Blast valve. After the event shelter would need constant source of air, People put off alot of heat – 40 CFM/Occupant.

  22. Interesting design. Bomb shelters may seem passé, considering that the risk of general nuclear war seems to have disappeared. However, I'm a firm believer in the idea that for as long as nuclear weapons with intercontinental delivery systems continue to exist, there remains a very real risk that they will be used, which means that the possibility of nuclear war cannot be completely ruled out, and some sort of response plan is appropriate.

    One problem associated with having a fallout or blast shelter is whether you can access it quickly. If you're at work when the balloon goes up, and your shelter is halfway across town, you're going to have extreme difficulty reaching it. And that's assuming you (and everyone else) gets sufficient notice of an attack. Chances are good that you may get little notice or, more likely, none at all.

    Sub-launched ICBM's can reach most cities along the US eastern seaboard in three to six minutes, which is barely enough time to figure out that an attack is in progress, let alone respond to it. Cities in the Midwest would probably start taking hits ten to fifteen minutes later, so they would have a little more time to prepare.

    Then there is the problem of whether your city is a target, or will only receive fallout from attacks on distant locales. If you're located in or near a target area, then you need to consider building a blast shelter. As other commentators have suggested, you'll need to harden the shelter against typical nuclear weapons effects. More specifically, so that it will withstand three things:

    – immediate radiation

    – heat

    – blast (and the accompanying issues of seismic shock and overpressure)

    The first two can be dealt with by burying the shelter several feet underground, and ensuring that the walls of the shelter are thick enough to support the earth overburden. The shelter need not be buried very deeply. Three feet is sufficient, and will stop 99% of the radiation coming from any fallout that arrives. Six feet is better, and will also do a better job of blocking the immediate radiation pulse.

    The blast wave, however, will require you to install blast valves, and a ventilation system that can pressurize the shelter so that it won't collapse from overpressure.

    You will also need to consider adding some sort of shock absorber system to cope with seismic effects (sometimes also known as 'ground slap'). Proper installation of

    blast valves, pressurization systems and shock management systems will require

    professional engineering assistance, and will make shelter design and construction more complex. To say nothing of more expensive.

    Here's a Youtube video that amply demonstrates what happens when the blast wave from a nuclear explosion hits. You'll see the seismic effects around the 0:30 mark.

    Chinese Nuclear Weapon Effects Test

    If your only concern is fallout, however, then a purpose-built shelter may not even be necessary, unless you live in an area where the heaviest fallout is expected. You could probably get by with erecting a refuge area in your basement with three feet of sandbags for a ceiling, and three feet of sandbags on each wall of the refuge, and then

    three feet of sandbags piled six feet high on the two outside walls closest to the shelter.

    If you plan to accommodate only yourself and your immediate family, (say four people in total), ventilation, food, water, and sanitation will not be as much of an issue.

    With 18 people, however, the issue of constructing a fallout shelter becomes more complex, and a purpose-built shelter will be required. A simple steel culvert pipe approximately ten to twelve feet wide, and sixty feet long, buried three to six feet underground and then outfitted accordingly, might be sufficient.

  23. Instead of a diesel generator you should use a magnetic generator. It doesn’t need any fuel. No gas output. And can theoretically run forever

  24. What about geo thermal energy? I know little about it….and as for digging 50 ft down, shielding, etc….what about a cave? Deep enough, just install vault style door, should that work?

  25. Food for thought….Gardening supplies/seeds/watering can, etc. Spare fuel for Generator.
    Battery Bank > 4-12 volt Batteries, at a minimum, w/AC-DC charger. Freeze dried foods…better for you. MRE’s as last resort. Food for while your under, then how about food after your up & out ?/?
    Nobody is gonna feed you. How about wood cutting tools. You’ll be able to cook outside sooner or later. `If ya live in the country`, how ya gonna get water from the well?/? Battery charger for “A>AA>AAA>C>D & 9 V batteries, Hook yer toilet sinks & shower to existing septic line if possible. Make part of shelter adaptable for a `root cellar`, with in ground ventilation , slopping slightly downwards from cellar walls….IN 12″ from floor…OUT 2′ from ceiling, opposite ends.
    3 levels of 4” drain pipe all around shelter. 1st one at base level,,,2nd one at 4′ height & last one at ceiling /wall level. “Reason”, if you have a heavy rain or constant light rain.
    What do you think the rain will wash into the ground…..`Radioactivity`.
    Remember, there will be nothing left to claim after the big Boom. It will be the 18th Century, all over again !/!
    Just thought of another one….”Got Pets”?/? Where they gonna Pee/poop?/? Then what ya gonna do with the waste?/? You have a toilet, they don’t. Have lots of sanitation articles on hand as well….toilet paper for sure ; >) !/! Liquid Bleach B e t t e r H a v e excellent ventilation. Plenty of 1st Aid supplies as well to have on hand. Vitamins & Minerals as well. One might want to recalculate that storage area space. There will be no stores.

  26. Hey dude who said that the particles wouldn’t enter they would proper air isolation and filtration is the difference between survival and death

  27. And the dude who says magnetic generatior, that is easier to say than to do such a generatior is a incredibly complicated and sensative machine that could stop functioning if anyone ever sneezed on its core as its weight distribution needs to be perfect for it to run for ever, why do you think that almost nobody owns one their just not practical the best energy source would be to dig a pit deep enough to reach a underground stream and hook a generator up to it

  28. oh and jouhny has a point it would just need some safety processions and internal structure reenforcements maybe if you live near a posible blast zone

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