ML20135J065

Responds to Violations Noted in Insp Repts 50-309/85-19 & 50-309/85-27.Corrective Actions:All Root Valves Identified Incorporated Into Appropriate Operating Procedures & Subcooled Margin Monitor Circuitry Redesigned

ML20135J065
Person / Time
Site:	Maine Yankee
Issue date:	09/13/1985
From:	Whittier G Maine Yankee
To:	Murely T, Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
6394L-GDW, GDW-85-239, MN-85-164, NUDOCS 8509250184
Download: ML20135J065 (3)

Text

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EDISON DRIVE MNRE HARHEE MGMICPOWERCOMPARUe nuous,x. uanNe oraas q (207) 623-3521 O

September 13, 1985 MN-85-164 GDW-85-239 Region I United States Nuclear Regulatory Commission Office of Inspection and Enforcement 631 Park Avenue King of Prussia, Pennsylvania 19406 Attention: Dr. Thomas E. Murley, Regional Administrator

References:

(a) License No. DPR-36 (Docket No. 50-309)

Subject:

Inspection Reports 85-19 and 85-27 Gentlemen:

This letter is in response to IE Inspection Report Numbers 85-19 and 85-27. As we discussed on September 9,1985, Maine Yankee has developed a program to correct and prevent recurrence of the circumstances described in the subject reports. The elements of this program, which will be completed prior to resuming power operation, are delineated below.

IE Inspection Report 85-19

1. Verify as open, all root valves (202) associated with instrumentation identified in T. S. Tables 4.1-1, -2, and -3.

2. Incorporate all root valves identified in (1) above into appropriate operating procedures to ensure that they are open and verified to be open prior to startup from each refueling outage.

3. Verify that appropriate administrative controls (procedures) exist on all isolation valves associated with instrumentation identified in (1) above.

4. Review all special tests and temporary procedures prior to use to ensure that each valve position is individually specified when realigning systems.

l 5. Revise the generic procedures governing the preparation and review of procedures to ensure valve positions are individually specified when realigning systems.

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M AINE Y ANKEE ATOMIC FCWER COMPANY United States Nuclear Regulatory Commission Page Two Attention: ' Dr. Thomas E. Murley, Regional Adninistrator t+1-85-164 IE Inspection Report 85-27 i

} 6. Redesign the Subcooled Margin Monitor (SMM) circuitry to eliminate the common connection.

< 7. Review all previous design changes which involve or could l interact with the safety instrumentation systems listed in T.S. Tables 4.1-1, -2, and -3.

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! 8. Provide an independent. design review of all of the design changes. identified in (7) above.

9. Develop functional test requirements that are more co@rehensive for all systems identified in (7) above that have been significantly modified since the issuance of the facility operating license _(1972), including those undergoing modification during the current outage.

10. Provide documented assurance that the functional test

requirements identified in (9) above have been previously satisfied, and no further modifications have been performed, or i perform new comprehensive functional tests to satisfy the applicable requirements.

11. Revise the EOCR procedures to specifically identify instrumentation lead "commoning" as requiring special design review eg hasis.

12. Revise the QA procedures to require that a comprehensive functional test be performed on modified circuits including any associated circuits that may be affected.

i 13. Revise the ECCR procedures to require a second independent design review of all EDCR's associated with instrumentation 4

identified in (7) above, with particular eg hasis to detecting i sneak or interactive circuits.

14. Revise the procedures governing design change implementation instructions to provide an independent review to ensure that 8 the functional test requirements are appropriately cogrehensive.

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M AINE Y ANKEE ATOMIC POWEQ COMPANY o .. o

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United States Nuclear Regulatory Commission Page Three l

Attention: Dr. Thomas E. Murley, Regional' Administrator MN-85-164

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I As we indicated during our meeting, we believe these actions are conprehensive and will prevent recurrence of the problems identified in the subject inspection reports. Please feel free to contact us if you should have ,

any questions, f

Very truly yours, i MAIE YANKEE ATOMIC POWER COM3ANY

} SW G. D. Whittier, Manager Nuclear Engineering & Licensing l

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' cc: Mr. Edward J. Butcher, Jr.

i Mr. Cornelius F.- Holden i

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