ML19249F307
| ML19249F307 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 09/17/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Aswell D LOUISIANA POWER & LIGHT CO. |
| References | |
| NUDOCS 7910110296 | |
| Download: ML19249F307 (1) | |
Text
ZZ ~
10 arc
+
o UNITED STATES E 'j, s..
E,'g NUCLEAR REGULATORY COMMISSION
- ~ ^
- s REGION IV o,, ' fi
[
611 RYAN PLAZA DRIVE, SUITE 1000 d
++,
- September 17, 1979 In Reply Refer To:
RIV Docket No.
50-382/IE Information Notice No. 79-22 Louisiana Power and Light Co.
ATTN:
Mr. D. L. Aswell Vice President of Power Production 142 Delarcnde Street New Orleans, Louisiana 70174 Gentlemen:
The enclosed IE Information Notice provides information with regard to a potential unreviewed safety question involving high energy lines and control systems.
Sincerely, 0
bf r/ I '
([
/
'Karl V. Seyfrit Director
Enclosures:
- 2. List of IE Information Notices Issued in the Last Six Months l n ~/ u n ! {g J
ud-i910110296
UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCElfENT WASHINGTON, D.C.
20555 hh 1
- w IE Information Notice No. 79-22 Date:
September 14, 1979 Page 1 of 1 QUALIFICATION OF CONTROL SYSTEMS Public Service Electric and Gas Company notified the NRC of a potential unreviewed safety question at their Salem Unit 1 facility.
This notification was based on a continuing review by Westinghouse of the environmental qualifications of equipment that they supply for nuclear steam supply systems.
Based on the present status of this effort, Westinghouse has informed their customers that the performance of non-safety grade equipment subjected to an adverse environment could impact the protective functions performed by safety grade equipment. These non-safety grade systems include:
Steam generator power operated relief valve control system Pressurizer
- power operated relief valve control systen Main feedvater control system Automatic rod control system These systems could potentially malfunction due to a high energy line break inside or outside of containment.
NRC is alco concerned that the adverse environment could also give erroneous information to the plant operators.
Westinghouse states that the consequences of such an event could possibly be more limiting than results presented in Safety Analysis Rcports, however, Westinghouse also states that the severity of the results can be limited by operator actions together with operating characteristics of the safety systems.
Further, Westinghouse has recommended to their customers that they review their systems to determine whether any unreviewed nafety questions exist.
This IE Information Notice is provided as an early notification of a possibly significant matter.
It is expected that recipients will rcs.cw the information for possible applicability to their facilities.
No r.pecific action or response is requested at this time.
If NRC evaluations so indicatc, further licensee actions may be requested or required.
If you have questicas regarding this actter, please contact the Director of the appropriate NEC Regional Office.
No written response to this Information Notice is required.
1 ij / u ou3 n;r
-