ML19344E412
| ML19344E412 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 08/19/1980 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Martin T Public Service Enterprise Group |
| References | |
| NUDOCS 8008280531 | |
| Download: ML19344E412 (1) | |
Text
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.,( [%j NUCLEAR REGULATORY COMMISSION -
UNITED STATES Aj REGION I g
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4 631 PARK AVENUE V
KING OF PRUSSIA, PENNSYLVANIA 19406
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August 19, 1980 Docket Nos. 50-354 50-355 Public Service Electric and Gas Company ATTN.
Mr. T. J. Martin Vice President Engineering and Construction 80 Park place Newark, New Jersey 07101 Gentlemen:
The enclosed IE Information Notice No. 80-30, " Potential for Unacceptable Interaction Between the Control Rod Drive Scram Function and Non-Essential Control Air at Certain GE BWR Facilities," is forwarded to you for information.
No written response is required.
If you desire additional information regarding this matter, please contact this office.
Sincerely,
'amn711,(4'A"r-Bo ce H. Grier I
rector
Enclosures:
i 1.
IE Information Notice No. 80-30 2.
List of Recently Issued IE Information Notices CONTACT:
D. L. Caphton (215-337-5266) cc w/encls:
E. N. Schwalje, Manager - Quality Assurance, Engineering and Construction Department
,8 0 0 8 28 0 f3l
SSINS No.:6670 Accession No.:
8006190057 IN 80-30 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 August 19, 1980 IE Information Notice No. 80-30:
POTENTIAL FOR UNACCEPTABLE INTERACTION BETWEEN THE CONTROL ROD DRIVE SCRAM FUNCTION AND NON-ESSENTIAL CONTROL AIR AT CERTAIN GE BWR FACILITIES Continued NRC evaluation of possible failure modes of the control rod drive system related to the Browns Ferry event (IE Bulletin 80-17), has identified a potentially significant single failure mechanism which could degrade the scram function.
The slow loss of non-essential control air pressure could degrade the scram function at ce
~ milities which have relatively poor com.;;unica-tion between the sc am e volume (SDV) and the scram discharge instru-
_.s mented volume (SDIV) sa... that the SDIV drains more rapidly than the SDV drain rate into the SDIV.
l The significance of such a single failure warrants transmission of an interim assessment by the NRC Office for Analysis and Evaluation of Operational Data as an early notification of a possibly significant matter that is still under review by the NRC staff.
It is expected that recipients will review the information for possible applicability to their facility.
No specific action or response is requested at this time.
If you have any questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
l
Enclosure:
Memo from C. Michelson to H. Denton, dated August 18, 1980 d
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