ML17298A811

Final Part 21 & Deficiency Rept Re Low Pressure Safety Injection & Containment Spray Pump Motors W/Defective Welds & Leaking Oil.Initially Reported on 830629.Defective Welds Identified & Repaired

ML17298A811
Person / Time
Site:	Palo Verde
Issue date:	02/02/1984
From:	Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Bishop T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
REF-PT21-84-344-000 ANPP-28778-BSK, DER-83-40, PT21-84-344, PT21-84-344-000, NUDOCS 8402150272
Download: ML17298A811 (8)

Text

Arizona Public Service Company P,O. 8OX 21666 i PHOENIX, ARIZONA 65036 February 2, 1984 ANPP-28778-BSR/TRB U. S. Nuclear Regulatory Commission Region V Creekside Oaks Office Park 1450 Maria Lane Suite 210

. Walnut Creek, CA 94596-5368 Attention: Mr. T. W. Bishop, Director Division of Resident Reactor Projects and Engineering Programs

Subject:

Final Report DER 83-40 A 50.55(e) Reportable Condition Relating to Unit 1 LPSE And CS Pump Motors Have Defective Welds And Are Leaking Oil.

File: 84-019-026; D.4.33.2

Reference:

A) elephone Conversation between A. D'Angelo and R. Tucker on June 29, 1983.

B) ANPP-27396 dated July 25, 1983 (Enterim Report)

C) ANPP-27962 dated October 5, 1983 (Time Extension)

D) NPP-28363 dated December 6, 1983 (Time Extension)

E) ANPP-28559 dated January 5, 1984 (Time Extension)

Dear Sir:

Attached is our final m'itten report of the Reportable Deficiency under 10CFR50.55(e), referenced above.

Very truly urq, E. E. Van Brunt, Jr.

APS Vice President, Nuclear ANPP Project Director EEVB/TRB:db At tachment cc: See Page Two 8 '/ /

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.Mr. T. W. Bishop ANP P-2 8778 Page Two IIX. Corrective Action C-E letter V-C-18997 outlines the following corrective actions which are being taken to preclude recurrence:

A. Inspection of Unit 3 LPSI and CS pumps by C-E has determined that the motor lower end brackets do not contain defective welds and are acceptable. The pumps are identified by the following tag numbers:

3SIA-POl 3SXA-P03 3SIB-P01 3SIB-P03 B. Inspection by C-E of the Unit 1 and 2 LPSI and CS pumps has determined that defective welds on the motor lower end brackets were unacceptable. New lower motor end brackets are being installed in accordance with Westinghouse Field Repair Procedure PXR-FH02. The pumps are identified by the following tag numbers:

1SIA-POl 2SIA-POl 1SIB-P01 2SXB-POl 1SIA-P03 2SIA-P03 1SIB-P03 2SXB-P03 C. C-E and Westinghouse determined that replacement of lower bearing housings on the Units 1, 2 and 3 LPSI and CS pumps with a new design ho'using was necessary. New housings are being installed in accordance with Westinghouse Field Repair Procedure PXR-FM02. The pumps are identified by the following tag numbers:

1SIA-Pol 2SIA-P01 3SIA-P01 1SIB-Pol 2SIB-Pol 3SI B-P01 1SIA-P03 lSIA-P03 3SIA-P03 1SIB-P03 2SIB-P03 'SIB-P03 D. NCR's SM-2132 and SM-3028 will be dispositioned as "Repair" and refer to DER 83&0.

A copy of this report will be sent to C-E for their revie~ and disposition under the requirements of 10CFR Part 21.

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Mr. T. W. Bishop DER 83-40 Page Two cc0 Richard DeYoung, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 T. G. Woods, Jr.

W. E. Ide D. B. Fasnacht A. C. Rogers B. S. Kaplan J. Vorees J. R. Bynum P. P. Klute A. C. Gehr W. J. Stubblefield W. G. Bingham R. L. Pa t ter son R. W. Welcher H. D. Foster D. R. Hawkinson L. E. Vorderbrueggen G. A. Fiorelli S. R. Frost J. Self D. Canady Records Center Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, GA 30339

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FINAL REPORT - DER 83-40 DEFICIENCY EVALUATION 50.55(e)

ARIZONA PUBLIC SERVICE COMPANY (APS)

PVNGS UNITS 1, 2, 3 I. Description of Deficiency During preoperational testing it was determined that the Units 1, 2, and 3 Low Pressure Safety Injection (LPSI) and Containment Spray (CS) pump motors exhibited excessive bearing housing oil leakage. It was also determined that defective welds were found on Units 1 and 2 LPSI and CS pumps motor lower end brackets. The pumps are manufactured by Ingersoll-Rand (IR), driven by Vestinghouse electric motors and supplied by Combustion Engineering (C"E) with the following project tag numbers:

1SIA-P01 2SIA-P01 3SIA-P01 1SIB-POl 2SIB-P01 3SIB-Pol 1SIA-P03 2SIA-P03 3SIA-P03 1SIB-P03 2SIB-P03 3SIB-P03 II. Analysis of Safety Implications The operability of the Low Pressure Safety Injection (LPSI) and Containment Spray (CS) pumps is essential to the safe operation of the plant.

C-E investigation of the reported condition have determined that the defective welds on the Unit 1 and 2 pump motor lower end brackets should impact the structural integrity of the pumps during a design basis event (DBE). C-E has determined that the lower bearing housing oil leakage may impair the operability of the Units 1, 2 and 3 pumps during their expected lifetime. C-E letters V-CE-20360, V-CE-18587 support this position.

Based on the above, the conditions are evaluated as reportable under the requirements of 10CFR50.55(e), since if the conditions were to remain uncorrected, they would represent- safety significant conditions.

The PVNGS project also evaluates the condition to be reportable under the requirements of 10CFR Part 21. Deficiency Evaluation Report 83-40 addresses reporting. requirements specified under 10CFR21.21(b) (3) with the exception of sub-part (vi) which requires the number and location of other possible defective equipment.

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