ML20197F836
| ML20197F836 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 05/12/1986 |
| From: | Larson C NORTHERN STATES POWER CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| IEB-85-003, IEB-85-3, NUDOCS 8605160019 | |
| Download: ML20197F836 (3) | |
Text
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Northern States Power Company 414 Nicollet Mall Minneapoks. Minnesota 55401 Telephone (612) 330 5500 May 12, 1986 Mr J G Keppler Regional Administrator - Region III U S Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 PRAIRIE ISLAND NUCLEAR GENERATING PLANT Docket Nos. 50-282 License Nos. DPR-42 50-306 DPR-60 Request for Extension of IE Bulletin 85-03 Deadline IE Bulletin 85-03, " Motor-Operated Valve Common Mode Failures During Plant Transients Due to Improper Switch Settings", requested licensees to develop a program to ensure that switch settings on certain safety related valves are selected, set and maintained correctly to accommodate the maximum differential pressures expected on these valves during both normal and abnormal events within the design basis.
Within 180 days of the date of the bulletin a written report was to be submitted to the NRC describing the program, its development and a schedule for implementation.
In response to the subject bulletin, the Westinghouse Owners Group (WOG) undertook a program to develop generic methodology to determine the maximum differential pressure which would occur across the motor operated valves specified in item a.
of the bulletin.
The results of this generic effort would provide each WOG utility with a methodology for their plant specific effort in responding to the bulletin and would provide a consistent methodology for responding to this issue.
A letter from L D Butterfield (WOG) to Thomas Novak (NRC) dated March 18, 1986, described this generic program and projected that the program would be completed in April of 1986. The letter also noted that plant specific implementation of the developed methodology may extend beyond the reporting requirements stated in the bulletin.
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e J G Keppler Northem States Power Company May 12, 1986 Page 2 The WOG getteric program was received by NSP on April 30, 1986.- This did not provide adequate time for thorough review of the applicability of the generic methodology to Prairie Island by the May 14, 1986 deadline.
Therefore, we request that the reporting requirements of item e. of IE Bullet.in 85-03 be extended to July 14, 1986 to allow for the review of the WOG generic methodology.
Please contact us if you have any questions about this request.
E C E Larson Vice President Nuclear Generation c: NRR Project Manager, NRC Resident Inspector, NRC (Document' Control Deski?NRC G Charnoff i
I I
UNITED STATES NUCLEAR REGULATORY COMMISSION NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT Docket No. 50-282 50-306 REQUEST FOR EXTENSION OF IE BULLETIN 85-03 DEADLINE Northern States Power Company, a Minnesota corporation, hereby submits a request for an extension of the I.E.Bulletin 85-03 deadline for the Prairie Island Nuclear Generating Plant.
This letter contains no restricted or othcr defense information.
NORTHERN STATES POWER COMPANY By j
h C E Lar n Vice Pre t, Nuclear Generation On this
/SM day of M
, /9/d before me a notary public in and for said County, personally appWared C E Larson, Vice President, Nuclear Generation, and being first duly sworn acknowledged that he is authorized to execute this document on behalf of Northern States Power Company, that he knows the contents thereof and that to the best of his knowledge, information and belief, the state-ments made in it are true and that it is not interposed for delay.
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DODY A. BROSE t40TARY PUBUC - MINNESOTA ;
HENNEPIN COUNTY j,'
.. ^ My Commission Dpires Dec.26,1949 ;
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