ML20091P565
| ML20091P565 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 01/28/1992 |
| From: | Parker T NORTHERN STATES POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-89-13, NUDOCS 9202030173 | |
| Download: ML20091P565 (3) | |
Text
e Northern States Power Company 414 Nicollet Mall Minneapolis, Minnesota 55401 1977 Teltephone (012) 3M 5500 January 28, 1992 l'RC Ceneric Let ter 89 13 U S Nuclear Regulatory Cornission Attn:
Document Control Desk Washington, DC 20555 PRAIRIE ISLAND NUCl. EAR GENERATINC PIANT Docket Nos. 50 282 License Nos. DPR-42 50 306 DPR-60 Response to NRC Ceneric hecter 8913 Service Water System Problems M icetine Safety Related Equipment
References:
1.
T H Parker, Northern States Power Company, to Director of Nuclear Reactor Regulation, dated January 29, 1990 titled:
" Response to Generic Letter 89-13 Service Water System Problems Affecting Safety Related Equipment" 2.
T M Parker, Northern States Power Company, to U S Nuclear Regulatory Commission, dated December 28, 1990 titled:
"Rosponse Update to NRC Ceneric Letter 89-13 Service Water System Problems Affecting Safety Related Equipment" 3.
T M Parker, Northern States Power Company, to U S Nuclear Regulatory Commission, dated June 27, 1991 titled: " Response Update to NRC Ceneric Letter 89 13 Service Water System Problems Affecting Safety Related Equipment" The purpose of this letter is to provide information regarding the status of activities taken by NSP in accordance with the Generic Letter.
In Reference 2, we committed to completion of a study of the effectiveness of our blocide program for the service water system by July 1, 1991.
Ee,uipment problems in our new biocide feed system necessitated modifications to the system and a repeat of a test to complete the study (Reference 3).
We have completed the study.
Biological testing indicated that the curcent biocide levels provide adequate control. We are presently utili::Ing the sodium l
hypochlorite/ sodium bromide system for biological control. We will continue to monitor effectiveness by periodic sampling at the remote points of the system. The sampling will involve testing for chemical levels as well as the use of bloslides to monitor biological growth. All sampling and monitoring will be documented.
9202030173 920129 PDR ADOCK 05000282 P
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l USNRC Northern States Power Company Page 2 of 2 January 28, 1992 Also, in Reference 2, we discussed planned inspections of accessible interior surfaces.
In the discussion, we committed to cicaning execssive accumulatione when discovered during these inspections. Additionally, we said that we would develop methods for mechanically cleaning the interior surfaces of piping.
Based on our success with chernical cleaning methods, we have changed our plans and presently intend to use chernical cleaning rather than :nechanical cleantog when there is excessive accumulation.
We now affirm that all initial tests and activities which we commit ted to in the referenced letters, with the exception of the development of inochnnical cleaning rnethods as discussed above, have been completed and t. hat continuing programs have been established.
Please contact us if you have any questions related to this response.
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uH Thomas M Parker Manager Nucicar Support Services c: Regional Administrator. Region III, NRC Senior Resident inspector, NRC NRR Project Manager, NRC J E Silberg i
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e UNITED STATES NUCLEAR REGUIA10RY COMMISSION NORTilERN STATES PO'.lE2 COMPANY PRAIRIE ISINiD NUCLEAR GENERATING PLANT DOCEET No. 50 282 50-306 RESPONSE TO NRC GENERIC LETTER 89 13, SERVICE k'ATER SYSTIM PROBLEMS AFFECTING SAFETY RElATED EQUIPMENT Northern States Power Company, a Minnesota corporation, with this letter is submitting information requested by NRC Generic Letter 89-13.
This letter contains no restricted or other defense information.
NORTilERN STAT [P.'pR CO PANY By
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Thomas M Parker Manager, Nuclear Support Services On thiaMday of 4W4df M fhefore me a notary public in and for r
said County, pen /hally appfared Thomas M Parker, Manager, Nuclear Support Services, and being first duly sworn acknowledged that he in authorized to execute this document on behalf of Northern States 'ower 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, j'!e d j'9A4
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NOTARY PUBUO-MINNESOTA l
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