ML17306B336

Requests Addl Info Re Core Operating Limit Supervisory Sys

ML17306B336
Person / Time
Site:	Palo Verde
Issue date:	03/16/1993
From:	Trammell C Office of Nuclear Reactor Regulation
To:	Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
References
TAC-M85011, TAC-M85012, TAC-M85013, NUDOCS 9303190168
Download: ML17306B336 (8)

Text

March 16, 1993 Docket Nos.

50-528, 50-529 and 50-530 Hr. William F.

Conway Executive Vice President, Nuclear Arizona Public Service Company P.O.

Box 53999

Phoenix, Arizona 85072-3999

SUBJECT:

COLSS ACTION STATEMENT PALO VERDE NUCLEAR GENERATING STATION (TAC NOS.

H85011, H85012, AND H85013)

In reviewing your request for amendment dated November 20, 1992, related to increasing the allowed time for the Core Operating Limit Supervisory System (COLSS) to be out of service, we find that the additional information identified in the enclosure is needed to continue our review.

We ask that you respond to the request for additional information within 60 days of yourl 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 w/enclosure:

See next page Original signed by:

Charles H. Trammell, Sr. Project Manager Project Directorate V

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

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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 March 16, 1993 Docket Nos. 50-528, 50-529 and 50-530 Hr. William F.

Conway Executive Vice President, Nuclear Arizona Public Service Company P.O.

Box 53999

Phoenix, Arizona 85072-3999

SUBJECT:

COLSS ACTION STATEMENT -

PALO VERDE NUCLEAR GENERATING STATION (TAC NOS.

M85011, M85012, AND M85013)

In reviewing your request for amendment dated November 20, 1992, related to increasing the allowed time for the Core Operating Limit Supervisory System (COLSS) to be out of service, we find that the additional information identified in the enclosure is needed to continue our review.

We ask that you respond to the request for additional information within 60 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 w/enclosure:

See next page

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Charles M. Trammell, Sr. Project Manager Project Directorate V

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

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Hr. William F.

Conway Arizona Public Service Company Palo Verde CC:

Nancy C. Loftin, Esq.

Corporate Secretary E Counsel Arizona Public Service Company P. 0.

Box 53999, Hail Station 9068

Phoenix, Arizona 85072-3999 James A. Beoletto, Esq.

Southern California Edison Company P. 0.

Box 800

Rosemead, California 91770 Senior Resident Inspector U.S. Nuclear Regulatory Commission HC-03 Box 293-NR

Buckeye, Arizona 85326 Regional Administrator, Region V

U.

S. Nuclear Regulatory Commission 1450 Haria Lane Suite 210 Walnut Creek, California 94596 Hr. Charles B. Brinkman, Hanager Washington Nuclear Operations ABB Combustion Engineering Nuclear Power 12300 Twinbrook Parkway, Suite 330 Rockville, Haryland 20852 Hr. William A. Wright, Acting Director Arizona Radiation Regulatory Agency 4814 South 40 Street

Phoenix, Arizona 85040 Chairman Haricopa County Board of Supervisors 111 South Third Avenue

Phoenix, Arizona 85003 Jack R.

Newman, Esq.

Newman 8 Holtzinger, P.C.

1615 L Street, N.W., Suite 1000 Washington, D.C.

20036 Curtis Hoskins Executive Vice President and Chief Operating Officer Palo Verde Services 2025 N. 3rd Street, Suite 220

Phoenix, Arizona 85004 Roy P.

Lessey, Jr.,

Esq.

Bradley W. Jones, Esq.

Arkin, Gump, Strauss, Hauer and Feld El Paso Electric Company 1333 New Hampshire Ave., Suite 400 Washington, D.C.

20036

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RE VEST FOR ADDITIONAL INFORMATION ENCLOSURE COLSS ACTION STATEMENT PALO VERDE NUCLEAR GENERATING STATION 1.

The last paragraph on page 6 of the submittal states: "If any adverse change in [departure from nucleate boiling ratio]

DNBR margin or [linear heat rate]

LHR is observed, the revised procedure will require operator action to restore the DNBR margin and LHR to be within acceptable values."

Provide the following:

a description of the adverse

change, including a discussion as to whether the change is conservative or non-conservative; a description of the required operator action; and a definition of "acceptable value."

2.

The submittal mentions a surveillance test procedure for monitoring DNBR margin and LHR while COLSS is out of service.

Is this surveillance test procedure a technical specification (TS) requirement?

Provide a description of the change to this procedure as a result of this TS amendment request.

3.

Provide a comparison of the proposed TS amendment with the revised standard TS.

4.

Referring to TS Surveillance Requirements 4.2. 1.2 (LHR) and 4.2.4.2 (DNBR margin),

what are the purposes of monitoring these limits once per 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> when COLSS is out of service?

5.

With respect to the compensatory actions which monitor DNBR margin and LHR at least 15 minutes to identify reduction in thermal margin when COLSS is out of service, is it more feasible to incorporate the 15 minutes monitoring in the ACTION statement?

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