ML17289A275

Authorizes Temporary Waiver of Compliance for License NPF-21 from Requirements of Plant TS Surveillance Requirement 4.6.1.4 Re MSIV LCS

ML17289A275
Person / Time
Site:	Columbia
Issue date:	01/17/1992
From:	Virgilio M Office of Nuclear Reactor Regulation
To:	Sorensen G WASHINGTON PUBLIC POWER SUPPLY SYSTEM
References
NUDOCS 9201290038
Download: ML17289A275 (6)

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aI ~*gW UNITEDSTATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 January 17, 1992 Docket No. 50-397 Mr. G. C.'orensen, Manager Regulatory Programs Washington Public Power Supply System 3000 George Washington Way P.

O.

Box 968

Richland, Washington 99352

SUBJECT:

OFFICE OF NUCLEAR REACTOR REGULATION TEMPORARY WAIVER OF COMPLIANCE TO WNP-2 TECHNICAL SPECIFICATION SURVEILLANCE REQUIREMENT 4.6.1.4 This letter authorizes a temporary waiver of compliance for Facility Operating License No.

NPF-21 from the requirements of WNP-2 Technical Specification (TS)

Surveillance Requirement (SR) 4,6 '

in regard to the Main Steam Isolation Valve Leakage Control System (MSIV LCS).

The temporary waiver of compliance was granted verbally on January 16,

1992, by NRC's Office of Nuclear Reactor Regulation (NRR), with concurrence of NRC's Region V office.

Your letter to the I'RC Document Control Desk dated January 16,

1992, provided the written basis for the temporary waiver of compliance that you requested.

The waiver became effective on January 16, 1992.

An emergency TS amendment request addressing modification of the SR acceptance criterion will be submitted by January 21, 1992.

This waiver is effective until March 16,

1992, by which time it is expected that the proposed TS amendment is granted or denied by NRP..

NRR performed an evaluation of your written documentation and found that it provided an acceptable basis for granting the temporary waiver of compliance.

Specifically, SR 4.6. 1.4.c requires that at least once per 18 months each MSIV LCS subsystem shall be demonstrated operable by verifying that the LCS blower develops a required vacuum at a rated capacity.

For the inboard valves, it is 17" H,O at 30 scfm; for the outboard valves, it is 17" H>O at 30 scfm.

Contrary to this requirement, the SR was performed with an acceptance criterion of 30 cfm.

The purpose of the MSIV LCS is to reduce the direct, untreated leakage of fission products through closed isolation valves in the Main Steam System following a loss of coolant accident with subsequent core damage.

The design requirement of the MSIV LCS blowers is that it accommodate a leakage rate of five times the TS leakage of 11.5 scfh per valve or 230 scfh (3.8 scfm).

By letter dated January 16,

1992, you stated that this value, when corrected for worst case temperature, pressure and humidity, would never exceed an indicat valre of 5 cfm.

On this basis you conclude that your previously used I"tI2i"'""jr I"'l.'"ubFti jglIPV 920i290038 920117 PDR ADOCK 05000397 P

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Mr. G.

C. Sorensen surveillance requirement acceptance criterion of 30 cfm is sufficiently conservative.

You state that a review of engineering documentation has revealed that the correct units are cfm, and not scfm as currently stated in the TS.

Finally, you state that this waiver does not involve a significant hazards consideration, does not have irreversible environmental consequences, or safety significance, and thus no compensatopy actions are warranted.

The NRC staff agrees with the assessment provided in your January 16,

1992, letter and, therefore, grants the temporary waiver of compliance.

However, the staff does not believe that this discrepancy in the fl'ow units could not have been avoided.

All licensees a'e responsible for ensuring the accuracy of plant-specific documentation for, their, facilities.

This oversight is indicative of improper control of de'sign specifications and this situation should be corrected.

I Sincerely, rl Martin J. Virgilio, Assistant Director for Regions IV and V

Division of Reactor Projects, III/IV/V Office of Nucle'ar Reactor. Regulation cc See next page DISTRIBUTION:

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Mr.

G, C. Sorensen surveillance requirement acceptance criterion of 30 cfm is sufficiently conservative.

You state that a review of engineering documentation has revealed that the correct units are cfm, and not scfm as currently stated in the TS.

Finally, you state that this waiver does not involve a significant hazards consideration, does not have irreversible environmental consequences, or safety significance, and thus no compensatory actions are warranted.

The NRC staff agrees with the assessment provided in your January 16,

1992, letter and, therefore, grants the temporary waiver of compliance.

However, the staff does not believe that this discrepancy in the flow units could not have been avoided.

All licensees are responsible for ensuring the accuracy of plan't-specific documentation for their facilities.

This oversight is indicative of improper control of design specifications and this situation should be corrected.

Sincerely,

&vtnu Martin 5. Virgilio, Assistant Director for Regions IV and V

Division of Reactor Projects, III/IV/V Office of Nuclear Reactor Regulation CC:

See next page

Mr. G.

C. Sorensen Washington Public Power Supply System WPPSS Nuclear Project No.

2 (WNP-2)

CC:

Mr. J.

W. Baker WNP-2 Plant Manager Washington Public Power Supply System P.O.

Box 968, MD 92TM

Richland, Washington 99352 G.

E.

CD

Doupe, Esq.

Washington Public Power Supply System 3000 George Washington Way P.

O.

Box 968, MD 396

Richland, Washington 99532 Mr.

R.

G. Waldo, Chairman Energy Facility Site Evaluation Council Mail Stop PY-11 Olympia, Washington 98504 Mr. Alan G. Hosier, Licensing Manager Washington Public Power Supply System P.

O.

Box 968, MD 956B

Richland, Washington 99352 Mr. A. Lee Oxsen, Assistant Managing Director =or Operations Washington Public Power Supply System P.

O.

Box 968, MD 1023

Richland, Washington 99352 Mrs Gary D.

Bouchey, Director Licensing and Assurance Washington Public Power Supply System P. 0.

Box 968, MD 280

Richland, Washington 99352 Regional Administrator, Region V

U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Chairman Benton County Board of Commissioners P.

O.

Box 190

Prosser, Washington 99350-0190 Mr. R.

C. Sorensen U.

S. Nuclear Regulatory Commission P.

O.

Box 69

Richland, Washington 99352 Nicholas S. Reynolds, Esq.

Winston a Strawn 1400 L Street, N.W.

Washington, D.CD 20005-3502

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