ML20024B543
| ML20024B543 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/05/1979 |
| From: | Swanson E BABCOCK & WILCOX CO. |
| To: | Kane E BABCOCK & WILCOX CO. |
| References | |
| TASK-01, TASK-02, TASK-06, TASK-1, TASK-2, TASK-6, TASK-GB GPU-0296, GPU-296, NUDOCS 8307090104 | |
| Download: ML20024B543 (1) | |
Text
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TiiE P.'.SCOCK & illLCOX COMPAllY I
PO' DER GEllERATION GROUP 1
i E. R. Kane. Licensing Fro:s E. W. Swanson. Plant Integration
'88 " 8 8 Cust.
File No.
or Ref.
All Operatint Plants Subj.
Date l
Pressurizer Relief Valve April 5, 1979 j,,......._......
Please review the following proposed operating instruction; if you concur please have this procedure implemented for all operating reactors.
-Upon receipt of an ESFAS signal or a low reactor coolant systc:a pressure of 1600 psig. the operator should iz:nediately isolate the block isolation valve upstream of the pressurizer pilot operated relief valve. -
At a later date all operating rencoors should caka a syste:a design modifica-tion to isolate the block valve automatically using either a low reactor coolant system pressure signal or an ESFAS signal All backlog ecatracts abould also make a design change to auto =atically '
.O isolate the bioct va1ve ust=> ESrRS sinnais. secause the ne = >1a =s cust comply with Reg. Cuide 1.75 IE to non-1E isolation, the block valve should recieve 2 buffered ISTAS outputs in a fashion similar to the turbine stop valve signals.
D. C. Newton is requested to issue a CI/A to imple=ent this change.
s 1
f 6
on -
ces D. E. Lee D. C. Nevton R. E. Ham
- 1. E. Wascher
- 5. A. Karrasch
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l N. S. Elliott
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Ted Book l
J. F. Walters
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I C. C. Shieck C. D. Russell FEW." LaBelle*
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O 99g
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P J.R. Danyo 8307090104 790405 DR ADOCK 05000289 HCL