ML19308B124
| ML19308B124 | |
| Person / Time | |
|---|---|
| Site: | Oconee, Mcguire, McGuire  |
| Issue date: | 11/08/1977 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Parker W DUKE POWER CO. |
| References | |
| NUDOCS 7912130763 | |
| Download: ML19308B124 (2) | |
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NUCLEAR REGULATORY COMMISSION
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NOV 8 1977 In Reply Refer To:
RII:JPO 50-369, 50-370 50-269, 50-270 50-287 Duke Power Company Attn:
Mr. William O. Parker, Jr.
Vice President, Steam Production P. O. Box 2178 427 South Church Street Charlotte, North Carolina 28242 Gentlemen:
Enclosed is IE Bulletin No. 77-05 which requires action by you with regard to your power reactor facility (ies) with an operating license or a construction permit.
Should you have questions regarding this Bullet:M or the actions required of you, please contact this office.
Sincerely,
/Mief James P. O'Reilly Director
Enclosures:
1.
IE Bulletin No. 77-05 w/ attachments (2) 2.
List of IE Bulletins Issued in 1977 cc:
J. C. Rogers, Proj ect Manager McGuire Nuclear Station P. O. Box 2178 Charlotte, North Carolina 28242 M. D. McIntosh, Plant Manager McGuire Nuclear Station P. O. Box 488
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J. E. Smith, Station Manager Oconee Nuclear Station P. O. Box 1175 Seneca, South Carolina 29678
NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D. C.
20555 November 8, 1977 IE Bulletin 77-05 ELECTRICAL CONNECTOR ASSEMBLIES Description of Circumstances Recent tests conducted by the Sandia Laboratories of electrical con-nector/ cable assemblies in a simulated post LOCA containment environment (LWR) demonstrated that the assemblies failed to perform in an acceptable manner.
The connectors are the pin and socket type, with metal shell and screw couplings.
The specific test specimens were manufactured by Bendix, ITT Cannon and Gulton Industries using combinations of Anaconda and ITT Surprenant cables.
Details of the specific connector / cable combinations, test-conditions, test results and other pertinent infor-mation are described in the Attachment.
While electrical connectors of the type tested are not normally used in applications that are required to survive LOCA conditions, it is not possible in the absence of specific information to conclude that such applications do not exist.
Further, it is unknown whether other manu-facturers have supplied similar assemblies, whether such assemblies have been properly qualified for the intended service or whether these type of assemblies are utilized in applications that must continue to operate reliably in a LOCA environment.
Action To Be Taken By Licensees and Permit Holders:
FOR ALL POWER REACTOR FACILITIES WITH AN OPERATING LICENSE OR A CONSTRUCTION PERMIT:
1.
Determine whether your facility utilizes or plans to utilize electical connector assemblies of the type tested by Sandia Laboratories, or any other similar type, in systems that are located inside containment, are subject to a LOCA environment and are required to be operable during a LOCA.
2.
If any such applications are identified, review the adequacy of qualification testing ror the assemblies and submit the documenta-tion for NRC review.
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