ML19263C302
| ML19263C302 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 02/09/1979 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Jeffery Grant TOLEDO EDISON CO. |
| References | |
| NUDOCS 7902210181 | |
| Download: ML19263C302 (1) | |
Text
F UNITFD STATES f' t NUCLEAR REGULATORY COMMISSION
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1 S REGION lit 799 ROoSEVE LT Ro AD h
GLE N E LLYN, ILLINOIS 60137
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a Docket No. 50-346 Toledo Edison Company ATTN:
Mr. James S. Grant Vice President - Energy Supply Edison Plaza 300 Madison Avenue Toledo, OH 43652 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 plants 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, s
8 l
James G. Keppler Director
Enclosures:
1.
List of IE Bulletins Issued in the past 12 months 3.
Li t of SEP Plants (11) cc w/encls:
Mr. T. D. Murray, Station Local PDR Superintendent NSIC Central Files TIC Director, NRR/DPM U. Young Park, Power Director, NRR/ DOR Siting Commission PDR 7902210\\%l
i 5
U.S. NUCLEAR REGULATORY COFD11SSION OFFICE OF INSPECTION AND ENFORCEMENT REGION III February 8, 1979 IE Bulletin No. 79-01 ENVIRONMENTAL QUALIFICATION 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 licensees.
In this regard, licensees were requested to examine installed safety-related electrical equipment and detennine 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 Amaid and Quad Cities 1 and 2 Nuclear Generating Stations.
The unqualified switches are identified as NAMCO Models SL2-C-11, S3CML, sal-31, sal-32, D1200j, 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 receiv of attention from all licensees Because of the protracted sched are now requesting the power re.
DUPLICATE DOCUMENT expedite completion of their re by IE Circular 78-08 dated May Entire document previously entered into system under:
Ybb[O2 ANO No. of pages: