ML17310A580

Requests Addl Info Re 901113 Request for Amend Re Safety Valve Setpoint Tolerances

ML17310A580
Person / Time
Site:	Palo Verde
Issue date:	09/02/1993
From:	Trammell C Office of Nuclear Reactor Regulation
To:	Conway W ALABAMA PUBLIC SERVICE CO.
References
TAC-M79226, TAC-M79227, TAC-M79228, NUDOCS 9309140027
Download: ML17310A580 (11)

Text

September 2,

1993 Docket Nos.

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

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

Box 53999

Phoenix, Arizona 85072-3999

SUBJECT:

SAFETY VALVE SETPOINT TOLERANCES PALO VERDE NUCLEAR GENERATING STATION (TAC NOS.

H79226, H79227, AND M79228)

In reviewing your request for an amendment related to safety valve setpoint tolerances dated November 13, 1990, together with the additional information provided in your Hay 27,

1992, and Hay 13, 1993, letters, we find that the additional information identified in the enclosure i's needed to continue our review.

We request that you provide a response 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:

Charles H. Trammell, Senior Project Manager Project Directorate V

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

Enclosure:

Request for Additional Information cc w/enclosure:

See next page DISTRIBUTION:;.

L Docket--Fi-1e JRoe CTrammell OGC 15B18 NRC

& Local PDRs EAdensam LTran ACRS (10)

P315 PDV Reading File Tguay EBarnhill

KPerkins, RV OFFICE NANE PDV LA EBarnhil PDV PH LTran mmell ay DATE

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CUMENT NAME:

PV79226.LTR 9309140027 930902 PDR ADOCK 05000528 P

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September 2,

1993 Docket Nos. 50-528, 50-529 and 50-530 Hr. William F.

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

Box 53999

Phoenix, Arizona, 85072-3999

SUBJECT:

SAFETY VALVE SETPOINT TOLERANCES PALO VERDE NUCLEAR GENERATING STATION (TAC NOS. H79226,

H79227, AND M79228)

In reviewing your request for an amendment related to safety valve setpoint tolerances dated November 13, 1990, together with the additional information provided in your May 27,

1992, and Hay 13, 1993, letters, we find that the additional information identified in the enclosure is needed to continue our review.

We request that you provide a response 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:

Charles M. Trammell, Senior Project Manager Project Directorate V

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

Enclosure:

Request for Additional Information cc w/enclosure:

See next page DISTR IBUTION:

Docket File JRoe CTrammell OGC 15B18 NRC 8 Local PDRs EAdensam LTran ACRS (10)

P315 PDV Reading File TQuay EBarnhill

KPerkins, RV OFFTCE NAME PDV LA EBarnhilfc.

PDV PH LTran L~

mmell ay DATE OFFICIAL RECORD COPY

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/93 0

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CUMENT NAME:

PV79226.LTR

p,~ RECo O~

~ Cy o0 ky*yW UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 September 2,

1993 Docket Nos. 50-528, 50-529 and 50-530 Hr. William F.

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

Box 53999 Phoenix, Arizona 85072-3999

SUBJECT:

SAFETY VALVE SETPOINT TOLERANCES PALO VERDE NUCLEAR GENERATING STATION (TAC NOS.

H79226, H79227, AND H79228)

In reviewing your request for an amendment related to safety valve setpoint tolerances dated November 13, 1990, together with the additional information provided in your Hay 27,

1992, and Hay 13, 1993, letters, we find that the additional information identified in the enclosure is needed to continue our review.

We request that you provide a response 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 Hanagement 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 Charles H. Trammell, Senior Project Hanager Project Directorate V

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

II

Mr. William F.

Conway Arizona Public Service Company Palo Verde CC:

Mr. Steve Olea Arizona Corporation Commission 1200 W. Washington Street Phoenix, Arizona 85007 James A. Beoletto, Esq.

Southern California Edison Company P. 0.

Box 800

Rosemead, California 91770 Senior Resident Inspector Palo Verde Nuclear Generating Station 5951 S, Wintersburg Road

Tonopah, Arizona 85354-7537 Regional Administrator, Region V

U. S. Nuclear Regulatory Commission 1450 Maria Lane Suite 210 Walnut Creek, California 94596 Hr. Charles B. Brinkman, Manager Washington Nuclear Operations ABB Combustion Engineering Nuclear Power 12300 Twinbrook Parkway, Suite 330 Rockville, Maryland 20852 Hr. Aubrey V. Godwin, 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 Hr. 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.

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

20036 Mr. Thomas R. Bradish, Manager Nuclear Regulatory Affairs Arizona Public Service Company P. 0.

Box 52034

Phoenix, Arizona 85072-2034

4 L

RE UEST FOR ADDITIONAL INFORMATION Enclosure The following questions stem from a comparison of the safety valve as-found setpoints tables presented in your May 27, 1992, letter (pp.7-8) and in your Hay 13, 1993,,letter (p. 6).

In addition, information contained in LER 92-005-01, dated April 24,

1993, was also used in comparison.

General Please explain why the two tables of the safety valve as-found setpoints presented in your Hay 27, 1992, letter (see pp. 7-8) listed only those valves that were found with positive tolerance.

2.

3.

Please provide that data used to construct the tables in your May 27, 1992, letter.

How many of the pressurizer safety valves are tested during each outage'ain Steam Safet Valves 2.

3.

Please explain why the number of valves with the as-found tolerance between 1X and 2X tolerance is different for Unit 2 in your Hay 27, 1992, letter than in your Hay 13, 1993, letter (26 vs.

27, respectively).

Your Hay 27, 1992, letter indicated that the total number of valves that had been tested for Unit 3 is 62.

During the Unit 3 outage in October

1992, 20 additional main steam safety valves (HSSVs) were tested (see LER 92-005-1).

Your May 13,

1993, letter states that 80 valves were tested.

Please explain the discrepancy (80 vs. 82).

Your letter of Hay 27, 1992, indicates that for Unit 3 the number of valves with the as-found tolerance between 2X and 3X is 4.

According to LER 92-005-01, two additional valves with the as-found tolerance between 2X and 3X tolerance were found.

Please clarify why your Hay 13, 1993, letter gives the number of valves with the as-found tolerance between 2X and 3X as 5 rather than 6.

Pressurizer Safet Valves Your May 27, 1992, letter indicates that the total number of valves tested for Unit 1 is 11.

However, in your Hay 13,

1993, letter, the total number of valves tested has decreased to 8.

Please explain the reason for the decreased testing.

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I

2.

Please provide an explanation regarding the omission of the Unit 3, April 1991 outage test data in your Hay 27,

1992, letter.

3.

Please explain the discrepancy in the number of valves with the as-found tolerance between 1X and 2X cited in your May 27,

1992, and Hay 13, 1993, letters (3 vs.2, respectively).

In addition, please explain why the number of valves with the as-found tolerance greater than 3X in your Nay 27, 1992, letter is 0 and the number of valves with the as-found tolerance between 3X and 4X is l.

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