ML19263C306
| ML19263C306 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 02/09/1979 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Gerstner W ILLINOIS POWER CO. |
| References | |
| NUDOCS 7902210193 | |
| Download: ML19263C306 (1) | |
Text
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Docket No. 50-461 FEB c Docket No. 50-462 Illinois Power Company ATTN:
Mr. W. C. Gerstner Executive Vice President 500 South 27th Street Decatur, TL 62525 Gentlemen:
Enclosed is IE Bulletin No. 79-01.
It requires action by you with regard to power reactor facilities with an operating license except for the 11 SEP 21 mas which are listed in Enclosure 3.
This Bulletin is also being sent for information to the 11 SEP plants and all power reactor facilities with a construction permit.
No action or written response is required for construction permit facilities or the 11 SEP plants.
Should you have questions regarding this Bulletin or the actions required of you, please contact this office.
Sincerely, h
e s?/ Y James G. Keppler Director Enclasures:
1.
List of IE Bulletins Issued in the past 12 months 3.
List of SEP Plants (11) cc w/encls:
Central Files NSIC Director, NRR/DPM TIC Director, NRR/ DOR Mr. Dean Hansell, Office of PDR Assistant Attorney General Local PDR 7902210 t 9 3
t U.S. NUCLEAR REGULATORY C0FDf1SSION OFFICE OF INSPECTION AND ENFORCEMENT REGION III February 8, 1979 IE Bulletin No. 79-01 ENVIRONMENTAL QUAL.IFICATION OF CLASS IE EQUIPMENT Description of Circumstances:
The intent of IE Circular 78-08 was to highlight to all licensees important lessons learned from environmental qualification deficiencies reported by individual licensces.
In this regard, licensees were requested to examine installed safety-related electrical equipment and detertnine that proper documentation existed which provided assurance that this equipment would function under postulated accident conditions.
The scope of IE Circular 78-08 was much broader than other previously issued Bulletins and Circulars (such as IEB 78-04 and IEB 78-02) which addressed specific component failures.
The intent of this Bulletin is to raise the threshold of IE Circular 78-08 to the level of a Bulletin; i.e., action requiring a licensee response.
Inspections conducted to date by the NRC of licensees' activities in response to IE Circular 78-08 have identified one component which licensees have found to be unqualified for service within the LOCA environment.
Specificially, unqualified stem mounted limit switches (SMLS). other than those identified in previously issued IE Bulletin 78-04, were found to be installed on safety-related valves inside containment at both Duane Amold and Quad Cities 1 and 2 Nuclear Generating Stations.
The unqualified switches are identified as NAMCO Models SL2-C-11. S3CML, sal-31, SA1-32, 01200j, EA-700 and EA-770 switches.
According to the manufacturer, these switches are designed only for general purpose applications and are not considered suitable devices for service in the LOCA environment.
Consequently, switches are being replaced at the above power plants with qualified components.
Also NRC inspection of component qualification has identified equipment which does not have documentation indicating it is qualified for the LOCA environment. The inspections have also identified that the licensees' re-review and resolution of problem areas are not receiving the level of attention from all 1 Because of the protract are now requesting the to expedite completion of DUPLICATE DOCUMENT by IE Circular 78-08 da Entire document previously entered into system under:
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