[ RadSafe ] report about Japan crisis.

[Doug Huffman]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

I recall a rule of thumb for water shielding gammas and neutrons.  Now
all we need is a reasonable guess at the dimensions of the vessel and
core.

My mnemonic is "Six and twelve, twelve and twenty-four" (tenth thickness
inches, gammas and neutrons, poly shielding and water) but it has been
too many years passed for me to apply it.

On 3/15/2011 10:01, Franta, Jaroslav wrote:
> UNRESTRICTED | ILLIMITÉ
> 
> Jeff et-al,
> 
> I suspect that the anomalously high readings near U3 & U4 buildings (see below) could be due to top of fuel being above water level -- therefore no water shielding, normally some 8m deep.....
> http://www.nei.org/filefolder/BoilingWaterReactorDesign_3.jpg
> 
> As soon as re-flooding submerges the core, it should go back down to much lower levels.
> Also, site boundary reading suggests that this is the case, rather than contamination....
> Hoping for confirmation soon !
> 
> Thnx
> 
> Jaro
> ^^^^^^^^^^^^^^^^^^^^
> 
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.14 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/

iQEcBAEBAgAGBQJNf4IQAAoJEIpOLnult3mgzvgH/3HMgANSCPC+Otvrg0hF2XYy
K1GkntEJfq/7NTMSbUNU08E+lrLN/t+BFOvA5lyEvI7Xw4Qna8Bi8SZPAR0L7umr
Ii/Evq7uxnvwKJs3IsY6cEXZdi/FbR7YQrxZAhaXjLnnaVhgfhclIiQqFU47JHoy
9Pfaa2g+4J/7Dll7n6rfr2x/nsgK+pdN7fC1N1kg/TeDeW+ykaplLec0Dx8i8cHF
TjAvjmionSHu4x1hVl7iibQEDjEWaPgmwQFzesty4rSAUyqvO7Z3xhMtztnwUTFR
HVEp9JbVazXbKA+I0HiBzG383Sl7bNwob7wAZVY/MvxuRSLiZt7SUtBKs/nTQN0=
=X1Rf
-----END PGP SIGNATURE-----