ML20133M608
| ML20133M608 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 01/15/1997 |
| From: | Wadley M NORTHERN STATES POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-96-04, GL-96-4, NUDOCS 9701220453 | |
| Download: ML20133M608 (3) | |
Text
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Northern States Power Company Prairie Island Nuclear Generating Plant 1717 Wakonade Dr. East Welch, Minnesota 55089 January 15,1997 Generic Letter 96-04 U S Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 PRAIRIE ISLAND NUCLEAR GENERATING PLANT Docket Nos. 50-202 License Nos. DPR-42 50-306 DPR-60 l
Supplemental Response to Generic Letter 96-04, Boraflex Degradation in Spent Fuel Pool Storage Racks This letter provides supplemental information in response to Generic Letter 96-04:
Boraflex Degradation in Spent Fuel Pool Storage Racks. Our original response to Generic Letter 96-04 was submitted to the NRC by letter dated October 23,1996 and a supplemental response was submitted by letter dated December 6,1996. Because of additional development work that was necessary to adapt the EPRI RACKLIFE computer program to the Prairie island specific spent fuel pool conditions, we were unable to provide a full assessment of the physical condition of the Prairie Island Boraflex spent fuel racks in our October 23,1996 response.
The assessment of the Prairie Island spent fuel racks using the EPRI RACKLIFE program, while not complete, provided sufficient preliminary information to allow for an updated response to Generic Letter 96-04. An assessment of the physical condition of l
the Boraflex in the Prairie Island spent fuel racks was attached to the December 6, 1996 letter. In that attachment, we stated:
While preliminary results from the RACKLIFE analysis indicate that some of the f
l spent fuel pool cells are outside their design basis, additional developmental
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l work is still required to fully quantify the extent of Boraflex degradation in the Prairie Island spent fuel storage racks. We expect the RACKLIFE analysis to be /)
'g completed by January 15,1997, and a supplemental response to Generic Letter 96-04, including the final results of the EPRI RACKLIFE calculations, will be submitted to the NRC at that time.
However, due to coding problems that appear to be related to the version of FORTRAN used in RACKLIFE, final results are still not available. It is anticipated that final results 9701220453 970115 l
PDR ADOCK 05000202 l
P PM
i USNRC NORTHERN STATES POWER COMPANY January 15,1997 Page 2 will be available by March 31,1997. We will submit the analysis when it has been completed. This is a change to our previous commitment to complete the analysis by January 15,1997. Note that the December 6,1996 response included corrective actions that were sufficiently conservative to allow for complete loss of Boraflex.
Therefore, the additional delay will have no safety significance.
Please contact Gene Eckholt (612-388-1121) if you have any questions related to our response to Generic Letter 96-04.
h bY Michael D Wadley Plant Manager Prairie Island Nuclear Generating Plant c:
Regional Administrator-Region Ill, NRC Senior Resident inspector, NRC NRR Project Manager, NRC J E Silberg
Attachment:
.I UNITED STATES NUCLEAR REGULATORY COMMISSION NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT DOCKET NO. 50-282 50-306 i
GENERIC LETTER 96-04, Boraflex Degradation in Spent Fuel Pool Storage Racks Northem States Power Company, a Minnesota corporation, with this letter is submitting information l
requested by NRC Generic Letter 96-04.
l This letter contains no restricted or other defense information.
l
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NORTHERN STATES POWER COMPANY BY Michael D Wadley
/'/
- 4 Plant Manager v
Prairie Island Nuclear Generating Plant i
On this day of Th%
(W before me a notary public in and for said
}
County, personally appeared Michael D'Wadley, Plant Manager, Prairie Island Nuclear Generating Plant; I
and being first duly swom acknowledged that he is authorized to execute this document on behalf of l
Northem States Power Company, that he knows the contents thereof, and that to the best of his knowledge, information, and belief the statements made in it are true and that it is not interposed for delay.
%. h NOTA U
NNEsOL j
g GOODHUE COUNrY Comm. Empires Jan 31, 2nnn l
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