ML17296B212

to Final Deficiency Rept Re Mechanical Interlock Device on 48/125 Volt Dc Battery Charger Cabinet Supplied by Power Conservation Products,Initially Reported on 801023. Design Change Packages Issued to Implement Design Fix

ML17296B212
Person / Time
Site:	Palo Verde
Issue date:	02/06/1981
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-17245-BSK, NUDOCS 8102180454
Download: ML17296B212 (8)

Text

R EGULATORY lNFORMATION DISTRIBUTION SYS I M (RIDS) v ~

ACCESSION NBRe810218005 l DOC ~ DATE 81/02/06 flOTARIZED NO DOCKET FAC IL: 50-528 Palo Verde Nuclear Stat i on i Unit 1 i Ar'i zona Public 050005?8 AUTH INANE AUTHOR AFFILIATION VAN BRUNT<K,ED Arizona Public Service Co, RECIP ~ NAME'ECIPIENT AFFILIATION SPENCERiG,S, Region 5~ San Franciscoi Reactor Construction L Engineer SUBJECT; Revision l to final d efq ciency rept re mechanical fnterloca dy/

device on 48/1?5 vol t dc batter y char ger cabinet suppl ied by Power Conservation Productsiinitially reported on 801023, Design change packages issued to ipplement design fix.

DISTRIBUTION CODE: 8019S COPIES RECEXVED:LTR TITLE: Construction Deficiency Report (10CFR50.55E)

~ENCL ~ SIZE:

NOTES:Standardized Plant. 05000528 RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAMEt LTTR ENCL ID CODE/NAME LTTR ENCL ACTION: A/D LICENSNG 04 1 1 MIRAGLIArF ~ 05 1 1 LEEiJ. 06 1 1 KERRIGAA p J, 07 1 1-INTERNAL: AD/RC I/IE 17 1 1 ASLBP/J ~ HARD 1 1 D/DIR HUM FAC15 1 1 DIRgDIV OF LIC 1 1 EDO L STAFF 19 1 1 EQUIP QUAL 8R 1 1 1 HYD/GEO BR 22 1 1 ILE 09 1 1 LIC QUAL BR 12 1 MPA 20 1 1 NRC PDR 02 1 1 OELD 21 1 1 14 '

REV 13 1 QA BR 1 G F ILK 01 1 1 RUTHERFORD p N, IE 1 1 DS DEV 21 1 EXTERNAL: ACRS 16 16 16 LPDR 03 1 1 NSIC 08 1 1

~ I gpss y9 'i~A TOTAL NUMBER OF COPIES REQUIRED: LTTR, 39 ENCL 39

4 y ~

ra '

Il I

K ~

q-Ai-~-.

CMaKC6M: 'FUIZM83 IKSIÃPMIEI CKeEQ35!2IW P. O. BOX 2I666 ~ PHOENIX, ARIZONA 85036 February 6, 1981 ANPP-17245-BSK/JAR U. S. Nuclear Regulatory Commission Region V

.Walnut Creek Plaza Suite 202 1990 North California Boulevard FFDxV/M)~ '-~

Walnut Creek, California 94596 Attention: Mr. G. S. Spencer, Chief Reactor Construction and Engineering Support Branch.

Subject:

Final Report A 50.55(e), Reportable Condition Relating to the Mechanical Interlock Device on the 48/125 Volt DC Battery Charger Cabinet Supplied by Power Conversation Products File: 81-019-026; D.4.33.2

Reference:

(1) Telephone Conversation between J. Eckhardt and J. E. Cook on October 23, 1980 (DER 80-31)

(2) Final Report, Letter ANPP-16692-BSK/JAR, dated November 5, 1980

Dear Sir:

Attached, is Revision 1 of the final written report of the reportable deficiency, under 10CFR50.55('e), referenced above. Revision 1 incor-porates the second battery-charger cabinet which was inadvertently overlooked during preparation of the original final report. Therefore, Revision 1 replaces the original final report transmitted by Reference (2).

Very truly yours,

~g E. E. Van Brunt, Jr.

APS Vice President Nuclear Projects ANPP Project Director EEVBJr/BSK;skc Attachment

va

'I

't 4

I

U. S. Nuclear Regulat ry Commission Attention: Mr. G. S. Spencer, Chief ANPP-17245-BSK/JAR February 6, 1981 Page 2 CC'Victor Stello, Jr , .Director . 3 Of fice-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 R. L. Patterson R. W. Welcher D. R. Hawkinson

vt~

~ ~

FINAL REPORT, REVISION 1 REPORTABLE DEFICIENCY 50.55(e)

ARIZONA PUBLIC SERVICE COMPANY (APS)

PVNGS UNIT /tl I. Descri tion of Deficienc It is possible to inadvertently defeat the mechanical interlock device on the Battery Charger Cabinet, Tag Nos. 1-E-PKA-H15 and I-E-PKB-H15, and close both breakers at the same time. This condition is due to lack of ri'gidity of the interlock device.

The deficiency was discovered during a routine review of jobsite conditions'y Bechtel Management.

The Specification (13-EM-051) for the safety-related battery chargers requires that the output circuit breakers in the battery charger be mechanically interlocked to prevent both breakers from being closed simultaneously. The breakers shall offer the possi-bility to be either both open or one closed and one open at any time.

II. Anal sis of Safet Im lications This condition is considered reportable based on the following considerations:

o If both circuit breakers are closed, the system is reduced to single mode failure in violation of IEEE and licensing requirements.

o The supplier, Power Conversation Products, recognized the condition and has provided an improved design for the Units //2 and i/3 battery chargers. This design increases the rigidity of the mechanical interlock device so that both breakers cannot be inadvertently closed.

III. Corrective Action The necessary action to implement the supplier provided design fix will be incorporated in Unit 81 following established field change procedures prior to system start-up. Design Change Packages (DCP's)

ICE-PK-012 and ICE-PK-013. has been issued for this purpose.

The Power Conversation Products representative has indicated that this condition is isolated to the above identified battery chargars.

0