ML20127H478
| ML20127H478 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 06/02/1978 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Wachter L NORTHERN STATES POWER CO. |
| References | |
| IEC-78-08, IEC-78-8, NUDOCS 9211180523 | |
| Download: ML20127H478 (1) | |
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(1 JUN 02 '28 Docket No. 50-263 - /
J Docket No. 50-282 -
V Docket No. 50-306,
Northern States Power Company AITN: Mr. Leo Vachter Vice President Power Production and System Operation 414 Nicollet Hall Minneapolis. NN 55401 centlement The enclosed IE Circular No. 78-08, is forwarded to you for infor-nation. If there are any questions related to your understanding of the
' suggested actions, please contact this office.
Sincerely, gamesG.g.-=OfcF Ker %
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Director Enclosurest 1.
IE Circular No. 78-08 2.
List of IE Circulars Issued in 1978 cc w/encls:
Mr. L. R. Eliason Plant Manager Mr. F. P. Tierney Jr.,
Plant Manager Central Files Director. NRR/DPM Director. NRR/ DOR PDR Local PDR NSIC 6 TIC Anthony Roisman. Esq.,
Attorney John W. Terman Ph.D..
Nuclear Engineer 9211180523 780602 PDR ADOCK 05000263 i
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U.S. NUCLEAR RECITLATORY CotNISSION OTTICE OF INSPECTION AND ENFORCEMENT RECION III June 2,1978 IE Circular No. 78-08 ENVIRONMEh7AL QUALITICATION OF SATITT-RILATED ELECTRICAL EQUIPMEhi AT NUCLEAR POLT.R PLAh75 The NRC staff initiated a series of actions to confirm the environnental qualification of electrical equipment required to perform a safety fune-tion under postulated accident conditions. These actions are sumarized in the Coc=1ssion's April 13, 1978 order in response to a petition from the Union of Concerned Scientists. Information obtained from recent licensee equipnent tests and evaluations have indicated potential problens in qualification of installed equipment. As a result, the NEC expanded these actions to include an environnantal review of safety-related electrical equipment at selected older plants.1 This review did not identify generic qualification deficiencies.
However, as a result of IE Bulletins and the aforenentioned testing to confira qualification, specific deficiencies were identified. Poor installation practicas, inadequate consideration of subcocponents and ocission of certain environmental parameters in the design are examples of such deficiences.
i In addition, the docuncstation of qualification was found to be inadequate in many cases and the initial response to some licensees indicated a lack of detai2ed knowledge of the quality of installed equipment.
The purpose of this Circular is to bring to your attention such deficiencies and to highlight the taportant lessons learned. In its April 13, 1978 Order, the comission indicated that
In order to fulfill its regulatory obligations, NRC is dependent upon all of its licensees for accurate and tinely information.
Since licensees are directly in control of plant design, construc-tion, operation and maintenance, they are the first line of defense to ensure the safety of the public. NRC's role is one primarily of review and audit of licensee activities, recognizing that limited resources preclude 100 percent inspection.
l Furtharnere, the Comission notes that some of the licensee's initial responses indicate a lack on their part of detailed know-ledge of the quality of installed plant equipment. Licensees must have this detailed understanding of their own plants in order to meet their obligations for public safety by ensuring a 37 94acrh%'jQf
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IE Circuint No. 78-08
-3 June 2, 1978 4.
Limit switches: While examining the documentation for the qualification of all safety-related equipnent installed inside containment, a vendor identified limit switches nounted on other-vise qualified valves at certain facilities. Preliminary review by the staff of responses to IE Bulletin 78-04 indicates such evitches are installed in similar applications at other facilities. Corrective action is presently in progress.
5.
Cable splices Electrical cable splices associated with electrical penetration assemblies were determined to be unqualified by licensees during their search for qualification documentation.11 6.
Other potential problems for specific cocponents currently under staff review includet
-radiation and temperature effects on electrical cables 10
-adequacy of qualification testing of components by separate effects versus sequential testing of environmental parameter 10
-te=perature liettations on nylon cocponents of solenoid valves 12
-qualification.of electrical transmitters 1.?,14 The review of these issues may result in the need for other follovvp or corrective actions.
No written response to this Circular itself is required. Each licenses should determine the applicability of the qualification items identified above for its facility. Appropriate corrective action should be taken for any problem identified by the licensee as a result of its review.
NRC inspectors vill review these satters with licensees in future inspections.
If further information is required, contact the Director of the appropriace Regional Office.
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t IE Circular No. 78-08 June 2. 1978 LISTING OF IE CIRCULARS ISSUED IX 1978 Circular Subject Date Issued To No.
of Issue 78-01 Loss of Well Logging 4/5/78 All Holders of source Vell Lotting Source Licenses 78-02 Proper Lubricating 011 4/20/78 All Holders of for Terry Turbines Reactor OLs or cps 78-03 Packaging Creater Than 5/12/78 All Holders of Type A Quantities of Reactor OLs. cps.
Few Specific Activity Tuel Cycle.
Radioactive Material Priority I Material for Transport and Vaste Disposal Licenses 78-04 Installation Errors that 5/15/78 All Holders of Could Prevent Closing of Reactor OLs or Tira Doors cps 78-05 Inadvertent safety 5/23/78 All Holders of Injectice During Reactor OLs or Cooldown CPa 78-06 Potential Cossson Mode 5/25/78 All Holders of T1ooding of ECCS Equip-Reactor OLs or ment Rooms at BVR cps Tacilities 78-07 Damaged Components 5/31/78 All Holders of On a Sergen-Paterst,n Reactor OLa or Series 25000 Nydraulic CPa Test Stand Enclosure Page 1 of 1 a
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c IE Circular No. 78-08 June 2, 1978 LISTIN0 OF IE CIRCU1 Juts ISSUED IN 1978 Circular Subject Date Issued To No.
of Issue f
78-01 Loss of Vell Logging 4/5/78 All Holders of Source Well Logging l
Source Licenses a
78-02 Proper Lubricating 011 4/20/78 All Holders of l
for Terry Turbines Reactor OLs or cps 78-03 Packaging creater Than 5/12/78 All Holders of Type A Quantities of Reactor OLs, cps, l
Tew Specific Activity Tuel Cycle, Radioactive Haterial Priority I Material I
for Transport and k'aste Disposal Licenses 78-04 Installation Errors that 5/15/78 All Holders of Could Prevent Closing of Reactor OLs or i
Fire Doors cps 78-05 Inadvertent Safety 5/23/78 All Rolders of i
Injection >; ring Reactor ole or Cooldown cps 78-06 Potential Common Mode 5/25/78 All Holders of T1ooding of ECCS Equip-Reactor OLs or ment Rooms at Tt'R cps Tacilities 78-07 Damaged Components 5/31/78 All Holders of On a Bergen-Paterson Reactor OLs or Series 25000 Bydraulic cps Test Stand Enclosure l
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1.
"Short Tern Safety Assessment on the Environmental Qualifications of Safety-Related Electrical Equipment of SEP Operating Reactors,"
Hay 1978, enclosure to staff memorandun to Coonission, dated May 12, 1978 and issued as EUREG Report 0458.
2.
"NRC Staf f Report on Union of Concerned Scientists' Petition for Emergency and Remedial Action," December 15, 1977, enclosure to staff memorandum to Comission, dated December 15, 1977.
3.
Letter from Consunars Power Conpany to NRC dated April 6,1978, including, " Summary of Qualifications of Electrical Penetration Assembly Connectors for the Palisades Plant " Docket No. 50-255.
4.
NRC Sumary of January 29, 1978 meeting on " Environmental Qualifica-tion of Terminal Blocks and Replacement of Terminal Blocks Haddam Neck Plant," Docket No. 50-213 dated January 30, 1978.
5.
NRC Summary of Tebruary 1,1978 meeting Tankee Rowe Nuclear Power Station (terminal blocks). Docket No. 50-29, dated rebruary 3, 1978.
6.
NRC Sumary of February 1,1978 neeting on " Environmental Qualifica-tion of Terminal Blocks and Replacement of Terminal Blocks," R. E.
l Cinna Nuclear Plant Docket No. 50-244 dated Tebruary 2,1978.
7.
Letter from Connecticut Tankea Atocic Power Company to WRC, dated March 29, 1978, including "Haddas Neck Plant Sumary of Environ-mental Qualification 73st Program. Terninal Block / Box combinations,"
Docket No. 50-213.
8.
Letter from Consumers Power Corgany to NRC, dated April 12, 1978, including information on terminal blocks at Palisades. Docket No.
50-255.
9.
Letter from Indians & Michigan Power Company to NRC, dated March 22, 1978 regarding terminal blocks at D. C. Cook Unit No. 2. Docket No.
50-316.
- 10. Letter fron Indiana & Michigan Power Company to NRC, dated Apri? 21 1978, regarding terminations at D. C. Cook Unit Nos.1 and 2, Docket Nos. 50-315 and 50-316.
- 11. Staff memorandum, " Status of Monticello Electrical Splice Upgrade,"
dated May 10, 1978 Docket No. 50-263,
- 12. Letter from Consumers Power Company to NRC, " Environmental Qualifica-tion for bis Rock Point," dated February 24, 1978 Docket No. 50-155.
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, 13. Letter from Consumers Power Company to NRC. Environmenital Qualifica-tion for Palisades." dated February 24. 1978 Docket No. 50-255.
- 14. Letter from Vestinghouse to E. C. Case, dated April 26. 1978 regarding environmental qualification status for D. C. Cook Unit 2. Docket No. 50-316.
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