ML19221A191
| ML19221A191 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/08/1979 |
| From: | Ross D Office of Nuclear Reactor Regulation |
| To: | Mattson R, Stello V, Vollmer R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7905190252 | |
| Download: ML19221A191 (1) | |
Text
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c's;T E C ST AT ES P.'UCLE R A E GU LI TC RY CC:' :ES.ON
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April 8, 1979 R 0 if, a
NOTE T0:
R.
/ollmer Stello R.
Mattson FROM:
D.
F.
Ross S L'3 J E C T:
Fc'RTHER ADDITION OF SDRON TO THE PRIMARY COOLANT SYSTEM Dr.
H.
Richings had a telephone call with BSW this af ternoon on the s ubj e c t of whether it would be appropriate to furthe r borate the prirary system.
BSW has expressed a concern, for several days, of a sec nd criticality problem.
Their fuels expert advised them that
'uel could redistribute.
For exanple, a change in flow c;nditions c;ul d move fuel around.
The t rad i t i ona l wa t e r-z i r con i um-f ue l -po i s on ratrix wes discarded; t he pa ramet ric study of fuel and wa t e r only ic; 5 ::nsid;r d.
T'. e volume ratics of.55 fuel,.45 weter, cad no ai
- 2 1ded K=1 (ebout) at 3000 rnr Soron.
The ov 3 er t
sicci ::st 'ste T.-
the increase in ftei
..is a col!anse of '.e!
TLF J J.~ 0 s C : ^ ' e.
is
.s tie bisis #or t1e E 5 '<.' e ferti:n ; ' :- t, in the ir/.c ast of saf2ty, additi:nsi s,ron should be added.
Howie recona, ends that no a'dditional physics calculations are ne:ctsary at he besitelly egrees with the physics, given t'e fse!
situation.
I re;or.end that-(1) we defer oe: mission to boron until ie obtain tre ecsuits of tha rext water sa ple; (2) if this sample shnas ade-Lron (2200 ro-) ard it also shs s
.o c ntrol rad
.a t rials,
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.d f3) if by t'at tine i-c tt.e trther d::u e-t?d our farc; i:atitn c :, n t e r n, then I C:n't teliese we shauld :';ra:e.
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