ML20057D148

Provides Response to Suppl 5 to GL 89-10, Inaccuracy of Motor Operated Valve Diagnostic Equipment

ML20057D148
Person / Time
Site:	Monticello
Issue date:	09/24/1993
From:	Richard Anderson NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GL-89-10, NUDOCS 9310010180
Download: ML20057D148 (3)

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Northem States Power Company 414 Nicollet Mall Minneapolis, Minnesota 55401-1927 l

Telephone (612) 330-5500 l

i September 24, 1993 US Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C.

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MONTICELLO NUCLEAR GENERATING PLANT Docket No. 50-263 License No.. DPR-22 Response to Generic Letter 89-10, Supplement 5,

" Inaccuracy of Motor Operated Valve Diarnostic Eauipment" Ceneric Letter 89-10, Supplement 5, " Inaccuracy of Motor Operated Valve Diagnostic Equipment", dated June 28, 1993 requires licensees to submit a written response to two questions asked within the body of the letter. We have completed our review of the letter and our responses to the questions are provided as follows:

Ouestion L:

"Within 90 days of receipt of this letter, all licensees are required to notify the NRC staff of the diagnostic equipment used to confirm the proper size, or to establish settings, for HOVs within the scope of GL 89-10."

NSF Response:

The Liberty Technologies VOTES system was purchased in mid-1992 and since that time has been used at Monticello to confirm the proper size, or to establish settings, for MOVs within the scope of GL 89-10.

The VOTES system was purchased as a replacement for the MOVATS i

diagnostic system, which had previously been used for this purpose at Monticello.

Use of the MOVATS system was discontinued in mid-1992 when the VOTES system was received.

Question 2:

"Within 90 days of the receipt of this letter, licensees are required to report whether they have taken actions (including schedule and sutwaary of actions taken or planned) to address the information on the inaccuracy of MOV diagnostic equipment. "

i NSP Response The MOVATS system was previously evaluated during our u'I assessment of NRC Information Notice 92-023, "Results of Validation g

9310010180 930924 PDR ADOCK 05000263 l

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USNRC NORTHERN STATES POWER COMPANY September 24, 1993 Page 2 1

I Testing of Motor Optrated Valve Diagnostic Equipment".

The evaluation indicated that operability of MOVATS tested valves was not affected, j

Similarly, inaccuracy associated with the VOTES system was previously evaluated during our assessment of NRC Information Notice 93-001, l

" Accuracy of Motor Operated Valve Diagnostic Equipment Manufactured by Liberty Technologies" The evaluation determined that the VOTES equipment was purchased with the upgrades necessary to account for the inaccuracies, f

With respect to Generic Letter 89-10, supplement 5, no further specific actions are planned at this time.

During the 1993 refueling outage, all valves previously set up with the MOVATS system (with the exception of six Combustible Gas Control System valves which are scheduled for VOTES l

set-up in 1994) were retested with the VOTES system. New information on the subject of MOV diagnostic testing, such as Industry experience items, diagnostic equipment user's manual updates and customer service bulletins, is reviewed by plant engineering personnel as it is received i

and evaluated as required. As of this writing, the only other known item which had the potential to affect the accuracy of the MOV diagnostic equipment used at Monticello was discussed in Liberty 1

Technologies Customer Service Bulletin CSB-030, which identified errors which may have been introduced by using proximity probe type calibrators in a configuration different than when the clamps were originally calibrated.

This concern was assessed and it was determined that this item does r.o t affect any testing done with the VOTES system at l

Monticello.

This letter contains no new NRC commitments, nor does it modify any previous connitments.

Please contact Terry Coss, Sr Licensing Engineer, at (612) 295-1449 if you require additional information.

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jO'ftlC L $~1h'Liftn -

l Roger O Anderson Director Licensing and Managettent Issues cc: Regional Administrator-III, NRC NRR Proj ect Manager, NRC Resident Inspector, NRC l

State of Minnesota, Attn: Kris Sanda l

J Silberg

Attachment:

Affidavit to the US Nuclear Regulatory Commission I

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i UNITED STATES NUCLEAR REGULATORY COMMISSION NORTHERN STATES POWER COMPANY MONTICELLO NUCLEAR GENERATING PLANT DOCKET NO. 50-263 REQUEST FOR AMENDMENT TO OPERATING LICENSE DPR-22 e

Monticello Response to Generic Letter 89-10, Supplement 5 Northern States Power Company, a Minnesota corporation, hereby provides the written response to the information requested in NRC Generic Letter 89-10, Supplement 5, " Inaccuracy of Motor Operated Valve Diagnostic Equipment", dated June 28, 1993.

This letter contains no restricted or other defense information.

NORTHER & STATES POWER COMPANY By

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1. 3h foger 0 Anderson Director Licensing & Management Issues onthisM ay of _

/ik 8 before me a notary public in and for said County, persotally appeared Roger 0 Anderson, Director, Licensing and Management Issues, and being first duly sworn acknowledged that he is authorized to e;:ecute this document on behalf of Northern States Power Company, that he knows the contents thereof, and that to the best of hic knowledge, information, and belief the statements made in it are true and that it is not interposed for delay.

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MARDA K LaCORE NOTARY PUBLIC-M;NNESOTA E

HFNNEPiN COUNTY My Commemon Expues Sept 24,1933 wwwwww:,::::::::::.yMNhwws I

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