ML13324A573

Requests Extension Until 851130 for Environ Qualification Documentation Re Westinghouse Motors for Feedwater Pumps & Paul Monroe Actuators Installed on Valves in Containment Isolation,Spray Sys & Recirculation Sys

ML13324A573
Person / Time
Site:	San Onofre
Issue date:	03/15/1985
From:	Medford M SOUTHERN CALIFORNIA EDISON CO.
To:	Zwolinski J Office of Nuclear Reactor Regulation
References
TAC-42516, NUDOCS 8503190429
Download: ML13324A573 (4)

Text

Southern California Edison Company P. 0.

BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD, CALIFORNIA 91770 M. 0. MEDFORD TELEPHONE MANAGER, NUCLEAR LICENSING March 15, 1985 (818) 302-1749 Director of Nuclear Reactor Regulation Attention: J. A. Zwolinski, Chief Operating Reactors Branch No. 5 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Gentlemen:

Subject:

Docket No. 50-206 Environmental Qualification San Onofre Nuclear Generating Station Unit 1 As part of the Environmental Qualification Program for San Onofre Unit 1, we have been developing the qualification packages for that equipment which is considered qualifiable. As indicated in our February 26, 1985 letter to the NRC, the packages will be completed by March 31, 1985, the 10 CFR 50.49 environmental qualification deadline. All the remaining equipment which can not presently be shown qualifiable will be replaced or qualified by the November 30, 1985 extension deadline or the plant will be shutdown.

The purpose of this letter is to identify additional items in the environmental qualification program which will require an extension in accordance with 10 CFR 50.49(g).

As a result of obtaining the qualification documentation for these items, it was determined that due to extenuating circumstances, additional time would be required to complete the documentation packages.

Details regarding the circumstances are provided below.

The feedwater pumps at San Onofre Unit 1 are utilized for feedwater and safety injection service. These pumps are driven by Westinghouse motors.

In our efforts to complete the qualification of the motors, Westinghouse has been unable to identify a test report which applies to the pump motors.

Westinghouse can correlate the materials of the motors to the materials of

,0 motors which have been tested.

Such a correlation can be used as a basis for qualification of the feedwater pump motors. The Westinghouse schedule for "oa completing this work is estimated at 6 months which is approximately 00 September, 1985.

Depending on the results of the Westinghouse work it will o

take two to eight weeks to develop a qualification documentation package for the Westinghouse motors. Therefore an extension of the qualification deadline rc of the motors to November 30, 1985 is requested.

Paul Munroe actuators are installed on valves in the Containment Isolation System, Containment Spray System and the Recirculation System. The U-)

test report which is being utilized as the basis for qualification of the GO-O..

actuators is for a similar Paul Munroe actuator. It has been determined that the test reports do not directly apply to the actuators designed and installed at San Onofre Unit 1. Paul Munroe is developing a correlation for the

Mr. J. A. Zwolinski

-2 similarity between the installed actuators and the tested actuator such that the test report will also apply to the installed actuators. The schedule for completion of this effort is the end of March 1985. Depending on the results of the correlation it will then take two to eight weeks to develop the qualification documentalon package for the Paul Munroe actuators.

It is therefore anticipated that following the completion of the Paul Munroe correlation the qualification package for the Paul Munroe actuators will be developed and completed prior to November 30, 1985. However, an extension to November 30, 1985 is requested in view of the uncertainty associated with the qualification documentation and to maintain consistency.

In both of the above cases, the justifications for continued operation have been reviewed and modified as necessary. These justifications have been developed in accordance with 10 CFR 50.49(1) and are provided here as an enclosure. They were previously provided to the NRC staff by letter dated November 3, 1984.

If you have any questions regarding this matter, please let me know.

Very truly yours, Enclosures cc: F. R. Huey

Plant Tag No.:

G3A,B Functional Name:

Pump Motors Manufacturer:

Westinghouse Model Number:

CS Type Functional

Description:

These motors service the feedwater pumps and are located outside the containment, under the turbine building on opposite sides of the building.

The pumps are utilized in the safety injection system to provide borated water to the reactor vessel.

Qualification Status:

Qualified, documentation evaluation is in progress.

Justification for Continued Operation:

Westinghouse motors containing similar materials have been tested under simulated accident conditions. Westinghouse will be developing the correlation between the motors materials and the motors tested by Westinghouse with similar materials. These motors are located outside containment (Areas 5, 6) and it is anticipated that all required accident conditions will be enveloped by testing. These components will be considered fully qualified when formal documentation of the plant specific evaluation is completed.

Documentation is scheduled to be completed prior to November 30, 1985.

Until the documentation is completed for the motors, in the event of a high energy line break in the vicinity of one of the motors, the environment will not affect the other motor. This is due to the fact the motors are located on opposite ends of the turbine building. The ECCS analysis for the plant relies on one feedwater pump operating therefore, the ability to provide core cooling is not affected.

This JCO complies with the criteria set forth in 10 CFR 50.49(1)(2) and (5) and ensures that SONGS 1 can be safely operated pending qualification of the pump motors.

Plant Tag No.:

CV515, 516, 517, 518, 525, 526, 527, 528, 737A, 737B Functional Name:

Hydraulic Rotary Valve Operators Manufacturer:

Paul Munroe Model Number:

PD89423, PD89425, P089426 Functional

Description:

These valve operators are located inside and outside containment on valves in systems which require operation following an accident.

Qualification Status:

Qualified, documentation evaluation is in progress.

Justification for Continued Operation:

Paul Munroe qualification test report No. PA87604 has been provided by the vendor as applicable to the installed valve operators.

Paul Munroe is developing a correlation between the tested valve operators and the installed operators.

The test sequence includes normal thermal aging and operating degradation in excess of requirements, based on the manufacturers recommended minimum maintenance schedules.

The test documents a gamma radiation accident exposure of 8.7x10 7 Rads following a minimum normal operation exposure of 1.25x10 7 Rads.

LOCA testing provides a peak temperature and pressure of 350aF and 66 psig, and dwell times that exceed the postulated accident requirements including margins. During LOCA testing, the test specimens were exposed to a chemical spray solution of pH 9.5 which is more severe than the required condition. Functional testing conducted throughout each sequence of the testing provides assurance of operability. These components will be considered fully qualified when formal documentation of the plant specific evaluation is completed.

Documentation is scheduled to be completed prior to November 30, 1985.

This JCO complies with the criteria set forth in 10CFR5O.49(i)(2) and ensures that SONGS-1 can be safely operated pending completion of the qualification documentation.