ML19332F350

Responds to NRC 890620 Ltr Re Violations Noted in Insp Repts 50-282/89-17 & 50-306/89-17.Corrective Actions:New Monthly Sampling Procedures Prepared Which Will Require Monthly Independent Samples Be Taken from Fuel Oil Storage Tank

ML19332F350
Person / Time
Site:	Prairie Island
Issue date:	07/20/1989
From:	Larson C NORTHERN STATES POWER CO.
To:	Axelson W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 8912140305
Download: ML19332F350 (3)

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Northern States Pw %

' 414 Nicollet Mall Minneapolis, Minnesota $54011927

. , Telephone (612) 3345500 I

"- 1 July 20,L1989

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1 Mr W L Axelson,. Chief l Projects Branch 2, Region III-

'U S Nuclear' Regulatory Commission j

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799-Roosevelt Road' l

+ Glen Ellyn, Illinois. 60137 i 1

PRAIRIE ISLAND NUCLEAR GENERATING PLANT }

Docket Nos. 50-282 License Nos. DPR-42 ,

p 50-306 DPR-60 l 1

Response to Notice of Violation .;

Inspection Renorts No. 50-282/89017(DRP) and 50-306/89017(DRP) 1

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i In response to your letter of June 20, 1989, which transmitted Inspection Reports ] '

No. 50-282/89017 and 50-306/89017, the following information is offered.

i Violation #1  ;

reasons:

The sample location on the day tanks, the level column drain valve, is such that any water or sediment transferred.from the fuel oil storage tanks would~ settle to the bottom of the day tank and be detected.

The current sample location is-conservative with respect to the storage environment. Industry events-and research have shown that fuel

, degradation, biological fouling and contamination are most likely to be detected from a day tank sample.

Obtaining a sample directly from the fuel oil storage tanks is especially difficult in the winter months and does not accurately reflect the condition of the oil at the suction of the fuel oil transfer pump.

Corrective Actions Taken and Results Achieved The new monthly sampling procedures are being prepared which will require that monthly independent samples be taken from each fuel oil storage' tank in addition to the day tanks.

Corrective Actions to Avoid Further Violations The new monthly sampling procedures will be in place by August 15, 1989.

Date When Full Comolfance Will Be Achieved Full compliance will be achieved in August, 1989, when the fuel oil storage

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tank samples will be taken.

Violation #2 Technical Specification 3.6.A.8 requires, in part, that during maintenance and testing activities, containment integrity is considered intact if the auxiliary building special vent zone (ABSVZ) boundary is opened intermittently, provided such openings are under direct administrative control and can be reduced to less than 10 s.quare feet within 6 minutes following an accident. Operations Procedure D54, Control of Openings in the Auxiliary Building Special Vent Zone Boundary, Rev. 3, requires that a log be kept in the control room which specifies the size and location of all openings in the ABSVZ. The log shall include the time and date openings are made and when they are closed.

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Northem States Power Company

}- W L Axel' son.

July ~20,1989 j

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. Contrary to the above, from approximately 0800 hours0.00926 days <br />0.222 hours <br />0.00132 weeks <br />3.044e-4 months <br /> on April 13, 1989, to ,!

'1402 hours0.0162 days <br />0.389 hours <br />0.00232 weeks <br />5.33461e-4 months <br /> on April 20, 1989,:an opening in the ABSVZ boundary was not under direct administrative control or logged.

This is~a Severity Level IV violation (Supplement 1). '

Corrective' Actions Taken and Results Achieved On April < 12, 1989,- Unit I was at 100% power and Unit 2,was in cold shutdown for refueling. Unit 2 steam piping-in.che Turbine Building had been opened in several places for routine maintenance. When valves in the Auxiliary Building

.were opened for maintenance, paths for air leakage through the Auxiliary Building Special Ventilation Zone boundary were created; the path was through the open steam piping in-the Turbine Building into the Auxiliary Building

-(which is shared by both units) through the open valves. Leakage paths are allowed to exist as long as they are administrative 1y controlled. The potential for creating uncontrolled leakage paths was not recognized by

. persons authorizing the work. When air was found blowing out the valves into the Auxiliary Building, the leakage paths were identified and the openin68

.were placed under administrative control.

' Corrective Actions to Avoid Further Violations Methods to improve administrative control of boundary openings during outages are being developed.

Date When Full Comoliance Will Be Achieved Full compliance will be achieved before the next refueling outage, which is January .1990 for Unit 1.

The event was reported as Unit 1 LER 89-004.

Picase contact us if you have any questions related to our response to the subject inspection reports.

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[ C E'Larson l / Vice President

' Nuclear Generation

, c: Regional Administrator III, NRC l Senior Resident Inspector, NRC NRR Project Manager, NRC

l. G Charnoff l

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