ML17310B057

Discusses 880622 Bulletin 88-08 Re Pipe Crack Resulting in Leak in Unisolable Section of Emergency Core Cooling Sys Piping Connected to RCS

ML17310B057
Person / Time
Site:	Palo Verde
Issue date:	02/18/1994
From:	Polich T Office of Nuclear Reactor Regulation
To:	Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
References
IEB-88-008, IEB-88-8, TAC-M69664, TAC-M69665, TAC-M69666, NUDOCS 9403020057
Download: ML17310B057 (10)

Text

UNITE STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 Docket Nos. 50-528, 50-529, and 50-530 Mr. Milliam F.

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

Box 53999 Phoenix, Arizona 85072-3999

Dear Mr. Conway:

February'8, 1994 9403020057 9402l8

'DR ADOCK 05000528t 8

'PDR

SUBJECT:

PALO VERDE NUCLEAR GENERATING STATION, UNIT NOS.

1, 2, AND 3

RESPONSE

TO NRC BULLETIN 88-08, "THERMAL STRESSES IN PIPING CONNECTED TO REACTOR COOLANT SYSTEMS" AND ITS SUPPLEMENT (TAC NOS.

M69664, H69665, AND M69666)

Bulletin 88-08, dated June 22, 1988, reported a pipe crack resulting in a leak in an unisolable section of emergency core cooling system piping connected to the reactor coolant system.

This Bulletin was issued to all nuclear power reactor licensees.

It requested licensees to review the reactor coolant systems to identify any connected, unisolable piping that could be subjected to thermal stresses, and to take action, where such piping is identified, to ensure that the piping will not be subjected to unacceptable thermal stresses.

Supplement 1 to Bulletin 88-08 expanded the initial scope to include examinations of high stress locations including base metal, as appropriate.

In your letter of June 30, 1993, Arizona Public Service Company (APS) provided a response to a request for additional information from the NRC letter of April 20,

1993, and an updated status of the APS response to Bulletin 88-08.

The staff, on September 2,

1993, held a telephone call with your staff to discuss and clarify, where necessary, the staff's request.

You provided responses on October 1,

1993, and January 26, 1994, to address the staff's questions.

In your response, you committed to install thermocouples on the pressurizer auxiliary spray and main spray systems in Unit 3.

These thermocouples will serve as a pilot program to determine thermocouple locations for Units 1 and 2.

In addition, you also provided calculation of the bounding. thermal stratification stresses in the auxiliary pressurizer spray line for staff's review.

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Nr. William.F.

Conway The staff reviewed your.response and concludes that your commitment to install temperature monitoring capability made in your,response meets the intent of Bulletin 88-08.

Therefore, we are closing TAC Nos.

H69664, 869665, and M69666.

In addition, we ask,that you inform us of. your schedul'e regarding the installation of thermocouples on, Units 1 and 2.

The staff review of the pressurizer auxiliary. spray, bounding calculation,. will be tracked. under TAC

'Nos.

N88684, 888683, and; 888682 for Units 1, 2-',

and 3, respectively..

Please contact me at (301) 504-1038 if you have any questions.

-Sincerely, Timothy Polich, Acting Project Manager Project Directorate V

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

See next page

Oi 0

I 1

I

Hr. William F.

Conway Arizona Public Service Company Palo Verde CC:

Hr. 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, Cal.ifornia 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 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. Aubrey V. Godwin, Director Arizona Radiation Regulatory Agency 4814 South 40 Street

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

Phoenix, Arizona 85003 Jack R.

Newman, Esq.

Newman 5 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 Hr. Ronald J. Stevens, Director Nuclear Regulatory Affairs Arizona Public Service Company P.

O.

Box 52034 Phoenix, Arizona 85072-.2034

4>

1 a

Hr. William F.

Conway The staff reviewed your response and concludes that your commitment to install temperature monitoring capability made in your response meets the intent of Bulletin 88-08.

Therefore, we are closing TAC Nos.

H69664, M69665, and H69666.

In addition, we ask that you inform us of your schedule regarding the installation of thermocouples on Units 1 and 2.

The staff review of the pressurizer auxiliary spray bounding calculation, will be tracked under TAC Nos.

H88684, M88683, and M88682 for Units 1, 2, and 3, respectively.

Please contact me at (301) 504-1038 if you have any questions.

Sincerely, Original signed by:

Timothy J. Polich, Acting Project Manager Project Directorate V

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

See next page DISTRIBUTION:

t'Docket'Fi.l.ed NRC and Local PDRs PDV Reading JRoe EAdensam TQuay DFoster-Curseen TPolich LTran OGC ACRS(10)

KPerkins, RV HHartzman JNorberg OFC NAME DATE PDV LA I

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Mr. William F.

Conway The staff reviewed your response and concludes that your commitment to instal-1 temperature monitoring capability made in your response meets the intent of Bulletin 88-'8.

Therefore, we are closing TAC Nos.

M69664, M69665, and M69666.

In addition, we ask that you inform us of your schedule regarding the installation of thermocouples on Units 1 and:2.

The staff review of the;

,pressurizer auxiliary spray bounding calculation, will be tracked under.

TAC Nos.

M88684, M88683, and'88682 for Units 1, 2, and-3; respectively.

Please contact:me at (301) 504-1038 if you have any questions.

Sincerely, Original signed.by:

Timothy J.. Polich, Acting Project Manager Project Directorate V

.Division of Reactor Projects

III/IV/V'ffice:of Nuclear Reactor Regulation cc:

See next page.

DISTRI BUTION:

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