ML17296B045

Final Deficiency Rept Re Potential Motor Shaft Breakage in Six Comsip,Inc Hydrogen Monitors.Necessary Action Being Taken to Have Equipment Reworked Per Supplier Recommendation,Prior to Sys Startup

ML17296B045
Person / Time
Site:	Palo Verde
Issue date:	10/31/1980
From:	Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Spencer G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
10CFR-050.55E, 10CFR-50.55E, ANPP-16652, NCR-J-X-131, NUDOCS 8011120477
Download: ML17296B045 (12)

Text

'1 REGULATOR NFORMATION DISTRIBUTION TEM (RIDS)

ACCESSION NBR:801 1120477 DOC ~ DATE: 80/10/3 1 NOTARIZED: NO DOCK FACIL; STN<<50 528 Palo Verde Nuclear Station~ Unit 1E AriZOna Publi 0 STN 50 529 Palo Verde Nuclear Stationi Unit 2P Arizona Publi 05000529 STN 50 530 Palo Verde Nuclear StationE Unit 3i Arizona Publi 05000530 AUTH'AME AUTHOR AFFILIATION VAN BRUNTPE E ~ Af f i l i at i on Unknown

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'ECIP RECIPIENT AFFILIATION SPENCEREG ~ ST Region 5E San Franciscoi Reactor Construction L Engineer:

SUBJECT:

Final deficiency rept re potential Montor shaft breakage in six Comsipi Inc hydrygen monitors. Necessary action being taken to have equipment reworked per supplier recommendationiprior to sys startup, DISTRISUTION CODE: SO I VS COPIES RECEIVED:LTR ENCL 4g SIZE:

TITLE: Cons t r uc t i on Deficiency Report (10CFR50, 55Ei)

NOTES:Standardized Plant, 05000528 Standardized Plant ~ 05000529 Standardized Plant ~ 05000530 RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME L'fTR ENCL ID CODE/NAME LTTR ENCL ACTION: A/D LICENSNG 04 1 MIRAGLIAgF ~ . 05 1" 1 LEEgJ ~ 06 1 1 KERRIGANE J ~ 07 1 1 INTERNAL: AD/RCI/IE 17 1 1 AEOD 18 1 1 ASLBP/J,HARD 1 1 D/DIR HUM FAC15 1 EDO 8 STAFF'9 1 1 EQUIP QUAL'R11 1 1 HYD/GEO BR 22 1 ISE 09 1 . 1 LIC QUAL" BR l 2 1 MPA 20 1 NRC PDR 02 1 OELD 21 1 1 PROC/ T REV 13 1 QA BR 14 1 1 FI 01 1 1 RUTHERFORDgH ~ IE 1 1 RDS DEV 21 1 1 EXTERNAL; ACRS 16 16 16 LPDR 03 NSIC 08 1 NOV 23 lgBP TOTAL NUMBER OF COPIES REQUIRED; LTTR 39 ENCL 39

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0 WUIKE M3 E5 <QC)EQERZ~~HF P. O. BOX 2I666 PHOENIXA ARIZONA 85036 October 31, 1980 ABPP-16652-BBK/JAR '

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U. S. Nuclear Regulatory Commission e~

Region V rP Walnut Creek Plaza Suite 202 P1C 1990 North California .Boulevard Mal

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't e7tD Walnut Creek, California 94596 1 1 "i{JI Attention: Mr.

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G. S. Spencer, Chief 'rn M

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CZI Reactor Construction and Engineering Support Branch n Cll fO

Subject:

A 50.55(e) Reportable Condition Relating to Potential Motor Shaft Breakage in Six Hydrogen Monitors Final Report File: 80-019-026

Reference:

Telephone Conversation between J. Eckhardt and B. S. Kaplan on October 1, 1980 (DER 80-29)

Dear Sir:

Attached, is our final written report of the reportable deficiency, under 10CFR50.55(e) referenced above.

Very truly yours

{ . W.k <~I'-<t E. E. Van Brunt, Jr.

APS Vice President Nuclear Projects ANPP Project Director EEVBJr/BSK:skc Attachment go/0

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U. S. Nuclear Regulatory Commission Attention: Mr. G. S. Spencer, Chief ANPP-16652-BSK/JAR October 31, 1980 Page 2 CC: LVictor Stello, Jr., Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 A. C. Gehr Snell & Wilmer R. L. Robb D. B. Fasnacht W. E. Ide A. C. Rogers, J. M. Allen J. A. Brand W. H. Wilson W. G. Bingham W. J. Stubblefield J. E. Bashore R. W. Welcher D. R. Hawkinson

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FINAL REPORT REPORTABLE DEFICIENCY 50.55(e)

ARIZONA PUBLIC SERVICE COMPANY (APS)

PVNGS UNITS //1, N2 and fi'3 I. Descri tion of Deficienc The project was notified by Comsip Delphi, Incorporated that six hydrogen monitors (two per Unit Tag Numbers 1JHPA-E02, 1JHPB-E02, 2JHPA-E02, 2JHPB-E02, 3JHPA-E02 and 3JHPB-E02) delivered to the jobsite may have a defect which could render the equipment inoperative. The possible defect exists in the motor pump combination of the hydrogen monitor wherein a motor shaft broke after-four hours of extreme test operations. During this test, the panel outlet valves were shut and the pump relief valves were set at about 100 psig; normally, the pumps are subject to no more than 85 psig.

As indicated by the attached letter, Comsip, Incorporated to Bechtel Power Corporation, dated August 6, 1980, Comsip has submitted a report on this condition per the require-ments of 10CFR Part 21.

II. Anal sis of Safet Im lications It cannot be determined without extensive analysis whether the above condition; if not detected, could have resulted in a safety significant event since the PVNGS operating conditions may never be as severe as that of the test.

However, this condition is considered reportable based on the supplier's recommendation to incorporate the redesigned shaft into the delivered equipment to increase the safety

'factor, and to allow for the eventuality of severe operating conditions.

III.'orrective Action The project is, taking the necessary actions to have the subject equipment reworked per the supplier's recommendation. The rework will be accomplished following established field change procedures prior to system start-up. In accordance with NCR J-X-131, rework is to be performed per Design Change Packages (DCP<'s) 1-CJ-HP-001, 2-CJ-HP-001 and 3-CJ-HP-001.

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Ct Iy erg ~h plan ws 1418 E.t.'fnden Avenue RO. Box 152 Unden, N J 07036 (201) 486 1272 Telex 13-8496 DE~ "rt'vS: = h': DivtStof(

10650 E. Rush Street

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inst "Ument and control systems South El Monte, CA 91733 (213) 442.0882 Telex 67-4768 August 6, 1980 Mr. John L. Hunt Bechtel Power Corp.

P.O. Box 60860, Terminal Annex Los Angeles, CA 90060

Reference:

Arizona Public Service Co., Palo Verde Nuclear Generating Station, Units 1, 2 6 3; CDI S.O. N80620 "Gentlemen:

The purpose of this letter is to notify you that Comsip, Inc.,

Delphi Systems Division, has filed a report for the possible existence of a reportable defect, as per the requirements of Code 10, Federal Regulations, Part 21.

See the attached letter dated July 31, 1980.

The possible defect exists in the motor-pump combination of the referenced equipment. ""The problem surfaced on the 29th of July, 1980. Four motor-pump units were being operated at extreme test conditions. The systems were being operated with the panel outlet valves shut and the pump relief valves set at at least 100 psig. One motor shaft broke after four hours of these extreme operating conditions.

Normally, with the pump relief valves set properly and the system outlet valve shut,'he'umps see no more than 8S psig.

In any case, in this condition the low sample flow alarms will sound and normally within an hour an operator will shut the motor off.

As indicated in the attached report, the motor shaft has been redesigned to increase the safety factor. Even though the failure occurred under extreme conditions, it is desirable to update the equipment to allow for such eventualities.

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1 August 6, 1980 Page 2 Comsip will provide motor-pump units with improved safety factor with installation'nstructions and fittings to all customers at a cost of $ 3,640.00. However, Comsip will refund $ 2,890.00 for every motor pump combination returned to our factory.

These units will be available October 1980.

If required, a Comsip Field Service person will be avail-able for supervising installation of these units. The rate for this service is $ 425.00 per day plus living and travel expenses.

If you have any questions hesitate'o or comments, please do not contact, me.

Yours very truly, T. J. Belke Product Manager TJB/jr

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