ML19221A203
| ML19221A203 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/17/1979 |
| From: | Ball R BABCOCK & WILCOX CO. |
| To: | |
| References | |
| NUDOCS 7905210010 | |
| Download: ML19221A203 (2) | |
Text
_..,
e A o r -..
ti, e.
.n.
J. -. n i n v' i l - '..
r3 - --
_c.o
.a u
c. n...
t.
- t..a. s.
~
r.,.. i -( U ps 1. e c o-r-
c..p, Li.
.1 c.w :
^
eg it.
ss_
6 w v..u CORE CONDITIGNS
-- cur r cuus e cetec'. ors car. provide cor t.:nuous inTornatior. cr ccre concit' or:3
- e., tnin tr e ;re sr.ure ves sel.
1.
Ir.-Core Tnerroccupies - Avciicble from co. puter printcut and strip char'.s fte ce out int in CH le Room.
C s...,,,. c !.
r :a f....<...,>3.-,.
..a
....:,..e
+
,.;..,,..+.,c...
- n.c cL6.
i v..-.
. 1... :.
..,so s.
2
>.c s v c.
rcac reruaily anc r e:Lcded hourly.
-r.ase should he :w on a ce:crain;
~
br~dge for contir_"us r:adi ;.
3.
.S F_ Pr e po r t i o n a l C ou n t.e..r..s - Th e s e two d e t e c tc rs re a d th e r. eu t r o n l e s k e c. e
--the pressure vessel anc' indicate the presance of wster in the dc..n-fr I c c ar in.he ves sel and charge ir, care ":rstron.rui tiplica tion (cri tic 51ity),
Inese detectors should be s; rip chart :co-ded cont 4.uously and be obser.'ed by tr.e Ccntr ol Room ce: scrnei.
4.
Ex-Cccc Fcveer Eance and Intermediate Cnannels - These detectors rtasure c :....c cctivin' aiscricution anc snieidir.c between source and de:ectort.
- h
.z ~- ~ } ;. f 4.,
v.
, 'r ; C mk
. q q.v L.) (
- k. 3 r_ r
- g.s e. t,.:. s.
s r.
r.
,-:.,...* c.
i ;.'.z a.
(
..ar.-*..-. -c
- c... ; r.e.
.. ".k...,
.J.
-. q '.,. ;..
i r.
', e.
e.
~2 en r.- r..- - -,-
....6
...,i s o
s
.. :a.r. e, -.. ~..
.-.CCIC$
n ~. ' # ff...
- b o l' r.
',,~+*c..
.,. C -.,, q C g e'-
t ' _ J L.. r e
. vu.
..s
.v.
..s.
s we
.ype\\; v.e-e in r-p art a-12 Tuei e.enents.
iney eacn v.
3 1.
e..ta r tu p s :,u rc e s / n =.=
n
- r. o.
s emit 1.4 x 10' neutrons per second as of L.pril 12, 1579.
r 'cte i.eet cr sc;rces - The iantnantm ca.:;tter ga-as ('ror o-scer cete) 2.
a
~l L.5 rev en Atrii 12, 1975 t.ere.7 x iC'~ cammas/se:.
Assuminc 1/3 of a
caTas are absorbed in water and a C 0 cor.cer.tration of G'li t i n o,ra i. ary 2
v.a;er - the neutror production is 15 x 10E n/sec (1on kev!.
An arc 43
~
u
,he tvciume) or primary system - The neutrcn procuction is.Os. n/sec -cm..
"shir.e" from the water to the detector.
3.
"al tiolicc tion of Source *;e_u trcns :
At 2772 MX, the flux at tre porzr rsnge channels r. ear the prcoortional t
counters (T r_o,; an a'.ersc.e current, indication of 50./ua and a caliLration of 1.E x 10 A/rv) is.312 x 10' ny Th courit r te of 30 c/s at the th proportional counter is ecuivalent to
.*l n v.h.
If t',e source reutrons s
- c. e a il eT iective in causing T ission,.ne pr ar.iary T ' e sion rate wou id be soda 940 162
~
o I O c>y P
e e
g l... ;'.
.s.
.p 1 + i. r_
h -. 7 m i.
c.. e r. s.
. =..... -._
- r c
,u
.s c
1.3 x 10 f'ss.Lns; e: or ao:ut 0.1 watts.
Ins i nv.s neutror, level at tnt propor:ional cour.ter indic; er fif all r:9;trors (cme frc the ccre) usinc a calibraticr. of.3 x 105 n v/ 2 7 7 2 h'.
a 9:, er l e',el of 10 wa tts.
A rultiolicatier. Of 103 is not credicle an""t's neutron cor.trib.> tion must ce.
4 Pr' Dortional Cranter Indications:
- bra.al ir.cica;icr. af tar a 20 day shutdesa (norrei from 10 EFPD) on this clar.t, a t 100 F,. as i co;r.t se:.
This could be considered a c.axima:
/
cirect sea ce shir.e (r..
- ';i,li
- :ti:n),
A facay curve, at r.airly corstint e
- c - i.3 gl
,3_
c ? s _.. c d u-s,,, u.a 's f l i. 3 se+>
n
.s s
ar ce
- .~-.~. ; i c.. t~ o, oi t.. :-
r-m s
e D r i l
~!, a n w, lb.
s i
t i
140 163
?