ML20129J532
| ML20129J532 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 10/30/1996 |
| From: | Wadley M NORTHERN STATES POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-96-06, GL-96-6, NUDOCS 9611060311 | |
| Download: ML20129J532 (2) | |
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Northern States Power Company Prairie Island Nuclear Generating Plant 1717 Wakonade Dr. East Welch. Minnesota 55089 l
October 30,1996 Generic Letter 96-06 U S Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 l
PRAIRIE ISLAND NUCLEAR GENERATING PLANT Docket Nos. 50-282 License Nos. DPR-42 50-306 DPR-60 Response to Generic Letter 96-06, Assurance of Equipment Operability and Containment Integrity During Design-Basis Accident Conditions l
The purpose of this letter is to provide the initial 30 day response to NRC Generic Letter 96-06 for the Prairie Island Nuclear Generating Plant.
Prairie Island is continuing to evaluate the containment fan cooler cooling water system i
for waterhammer and two-phase flow conditions during postulated accidents.
Additionally, evaluations of piping systems that penetrate containment to determine if they are susceptible to thermal expansion of fluids which may cause over-pressure conditions are continuing.
The operability of affected systems has been assessed based on preliminary analysis results. These assessments have determined that all affected equipment is operable.
Analyses are currently being finalized.
Upon completion of the analyses of (1) waterhammer and two-phase flow conditions in the containment fan cooler cooling water system and (2) the over-pressure susceptibility of piping systems that penetrate containment due to thermal expansion of fluids a summary report will be provided which describes the evaluations performed and the basis for operability of the affected systems. We commit to providing this summary o later than January 28,1997.
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USNRC NORTHERN STATES POWER COMPANY October 30,1996 Page 2 Currently, no corrective actions are planned. Any changes made in system operation in the future would increase the systern design margins and are not required for system operability.
We believe the evaluations that are being performed are fully responsive to the concerns identified by the Commission in the Generic Letter. Please contact Jack Leveille (612-388-1121, Ext. 4662) if you have any questions related to this letter.
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Michael D Wadley Plant Manager Prairie Island Nuclear Generating Plant c: Regional Administrator-Region lil, NRC Senior Resident inspector, NRC NRR Project Manager, NRC J E Silberg GL9606. DOC i
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