ML16342A081

Forwards Request for Addl Info to Continue Review of Eagle 21 Upgrade Project at Plant

ML16342A081
Person / Time
Site:	Diablo Canyon
Issue date:	04/29/1993
From:	Peterson S Office of Nuclear Reactor Regulation
To:	Rueger G PACIFIC GAS & ELECTRIC CO.
References
TAC-M84580, TAC-M84581, NUDOCS 9305040364
Download: ML16342A081 (10)

Text

Docket Nos.

50-275 and 50-323 Mr. Gregory M. Rueger Nuclear Power Generation, B14A Pacific Gas and Electric Company 77 Beale Street, Room 1451 P.O.

Box 770000 San Francisco, California 94177

Dear Mr. Rueger:

April 29, 199

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING THE EAGLE 21 REVIEW FOR DIABLO CANYON NUCLEAR POWER PLANT, UNIT NO.

1 (TAC NO. M84580)

AND UNIT NO.

2 (TAC NO. H84581)

In reviewing your request for amendment dated September 21,

1992, an audit of the Eagle 21 upgrade project for Diablo Canyon was performed at Westinghouse (Pittsburgh),

Pacific Gas and Electric corporate headquarters (San Francisco) and the Diablo Canyon plant site the week of April 5, 1993.

Several action items were discussed and summarized during the exit meeting held on April 9, 1993.

In addition to items discussed during the audit, several issues that warrant a response have subsequently been identified.

Enclosed is a request for additional information (RAI) that is needed to continue our review.

This RAI formally documents exit meeting open items requiring a written response.

We request that you respond to the additional information within 30 days of your receipt of this letter.

This request for information affects fewer than 10 respondents.

Therefore, it is not subject to Office of Management and Budget review under Pub.

L.96-511.

Please contact us should you have any questions regarding this request.

Sincerely, Original signed by Sheri R. Peterson, Project Manager Project Directorate V

Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation

Enclosure:

Request for Additional Information cc:

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t UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 205554001 Apr i 1 29, 1993 Docket Nos.

50-275 and 50-323 Mr. Gregory M. Rueger Nuclear Power Generation, B14A Pacific Gas and Electric Company 77 Beale Street, Room 1451 P.O.

Box 770000 San Francisco, California 94177

SUBJECT:

RE(VEST FOR ADDITIONAL INFORMATION REGARDING THE EAGLE 21 REVIEW FOR DIABLO CANYON NUCLEAR POWER PLANT, UNIT NO.

1 (TAC NO. M84580)

AND UNIT NO.

2 (TAC NO. M84581)

In reviewing your request for amendment dated September 21,

1992, an audit of the Eagle 21 upgrade project for Diablo Canyon was performed at Westinghouse (Pittsburgh),

Pacific Gas and Electric corporate headquarters (San Francisco) and the Diablo Canyon plant site the week of April 5, 1993.

Several action items were discussed and summarized during the exit meeting held on April 9, 1993.

In addition to items discussed during the audit, several issues that warrant a response have subsequently been identified.

Enclosed is a request for additional information (RAI) that is needed to continue our review.

This RAI formally documents exit meeting open items requiring a written response.

We request that you respond to the additional information within 30 days of your receipt of this letter.

This request for information affects fewer than 10 respondents.

Therefore, it is not subject to Office of Management and Budget review under Pub.

L.96-511.

Please contact us should you have any questions regarding this request.

Sincerely,

Enclosure:

Request for Additional Information cc:

See next page Sheri R. Peterson, Project Manager Project Directorate V

Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation

Mr. Gregory M. Rueger Pacific Gas and Electric Company Diablo Canyon CC:

NRC Resident Inspector Diablo Canyon Nuclear Power Plant c/o U.S. Nuclear Regulatory Commission P. 0.

Box 369 Avila Beach, California 93424 Dr. Richard Ferguson, Energy Chair Sierra Club California 6715 Rocky Canyon Creston, California 93432 Ms. Nancy Culver San Luis Obispo Mothers for Peace P. 0.

Box 164 Pismo Beach, California 93448 Hs. Jacquelyn C. Wheeler 3303 Barranca Court San Luis Obispo, California 93401 Managing Editor The County Telegram Tribune 1321 Johnson Avenue P. 0.

Box 112 San Luis Obispo, California 93406 Chairman San Luis Obispo County Board of Supervisors Room 370 County Government Center San Luis Obispo, California 93408 Mr. Truman Burns Hr. Robert Kinosian California Public Utilities Commission 505 Van Ness, Rm.

4102 San Francisco, California 94102 Hr. Steve Shu Radiologic Health Branch State Department of Health Services Post Office Box 942732 Sacramento, California 94234 Regional Administrator, Region V

U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Mr. Peter H. Kaufman Deputy Attorney General State of California 110 West A Street, Suite 700 San Diego, California 92101 Michael H. Strumwasser, Esq.

Special Assistant Attorney General State of California Department of Justice 3580 Wilshire Boulevard, Room 800 Los Angeles, California 90010 Christopher J. Warner, Esq.

Pacific Gas

& Electric Company Post Office Box 7442 San Francisco, California 94120 Mr. John Townsend Vice President and Plant Manager Diablo Canyon Power Plant P. 0.

Box 56 Avila Beach, California 93424 Diablo Canyon Independent Safety Committee ATTN:

Robert R. Wellington, Esq.

Legal Counsel 857 Cass Street, Suite D

Monterey, California 93940

I I

P

RE UEST FOR ADDITIONAL INFORMATION EAGLE 21

UPGRADE, DIABLO CANYON NUCLEAR POWER PLANT UNITS 1

AND 2 guestions 2.

3.

The bases document on setpoint methodology for protection systems (WCAP-13556) describes the loss of one resistance temperature detector (RTD) by the addition of a bias term to a two RTD aver age (instead of the three RTD average).

It is the staff understanding that the Eagle 21 system operation does not utilize this methodology.

Please clarify the description in the bases document and provide a brief description of the Eagle 21 system operation with a defective RTD.

The HVAC system for the cable spreading room at Diablo Canyon (which houses the Eagle 21 equipment) was shown to be a Non-Class IE system with the capability to be realigned to a Class IE system.

The maximum temperatures referenced in the technical specifications (TS) exceeded Eagle 21 qualification operating requirements.

= Describe the changes

,proposed to ensure that the operating environment will not exceed the qualification envelop for Eagle 21.

Provide a letter summarizing Eagle 21 FCC Part 15, Subpart J, Class A

and B emission test results.

Provide confirmation on the software revision to be incorporated at Diablo Canyon (V2 or V4).

Detail the differences between revision 2 and 4.

5.

6.

7.

8.

Provide details on the methodology to be employed in implementing the loop RTD cross calibration procedures at Diablo Canyon.

Specifically, describe data logger test points and methods to avoid common mode failure concerns when utilizing the NNI or data loggers.

Provide

drawings, or additional documentation that confirms that sufficient calibration overlap exists during RTD channel calibration.

Provide details and summary descriptions of proposed surveillance and maintenance procedures for cabinet cooling fan(s) operations, filter condition, vent integrity, electrostatic discharge precautions and electromagnetic/radio frequency interference (ENI/RFI) gasket/vent screen integrity.

Provide a detailed list of control systems affected by the Eagle 21 system.

Finalize Westinghouse Defense in Depth analysis (related to WCAP-12813) to include additional items discussed during the audit (For example:

additional steam generator tube rupture backup inputs).

Y

9.

Provide qualification references for the CLI board (EHI/RFI, noise, seismic) including isolation device testing (maximum credible fault).

10.

Discuss the diversity between NSAC and Eagle 21 as required by 10 CFR 50.62.

The response should include information on the compilers, linkers, locators, and the use of an identical software language for both AHSAC and Eagle 21.

The diversity of board components should also be discussed (similarity of processors, isolation amplifiers, AD converters, multiplexer, and precision voltage references).

Perform a

thread audit of both the ANSAC and Eagle 21 steam generator low level functions and provide the results of the evaluation.

ll.

Describe the Westinghouse methodology to calculate the 18-month instrument drift term for instrumentation provided by Westinghouse.

(WCAP-13556)

Confirm that the bases document and WCAP-11082 have been evaluated to ensure that the as-built instrumentation is bounded by the above referenced setpoint methodology documents.

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