ML19343B082

AO 50-29/75-07:on 750807,auxiliary Operator Noted Crack in Charging Pump Relief Valve Nozzle Above Flange Connection to Discharge Piping.Caused by Vibration of Positive Displacement Charging Pumps

ML19343B082
Person / Time
Site:	Yankee Rowe
Issue date:	08/15/1975
From:	Autio H, Janet Staub YANKEE ATOMIC ELECTRIC CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
AO-50-29-75-07, AO-50-29-75-7, NUDOCS 8012020708
Download: ML19343B082 (3)

Text

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.J YAllHEE ATOMIC ELECTRIC COMPAllY

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-r Rowe,Mossachusetts 01367 t

ha SlKEE August 15, 1975

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~,a Mr. J. P. O'Reilly, Director Office of Inspection and Enforcement Region 1 U. S. Nuclear Regulatory Cortission 631 Park Avenue King of Prussia, Pennsylvania 19406

Subject:

Abnomal Occurrence 50 29/75-07, Weld Crack in No. 3 Charging Pump Relief Valve Noz.le

Dear Mr. O'Reilly:

In accordance with Technical fpecifications, Section E.2.a, the attached Licensee Event Report is hereb/ submitted.

Very truly yours MM/

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\\ eb Ns Herbert A. Autio

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Plant Superintendent j y7 lb

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Enclosure

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(40) Director of Regulatory Operations

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U. S. Nuclear Regulatory Cc=tission E s.', - 1 Washington, D.C.

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[PLEASE P; TNT ALL CEEUIZEO INFCRMATION)

CONTROL BLOCK:l j

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NAuE LCENSE NUMBER YE Q lM l Al Yl Kl Rl 1l l0 l0 l-l 0l 0l 0l 0l 0l-l 0 l 0 l l 4l 1 l1l 1l 1l l 0l IJ 7 89 14 15 25 26 30 31 11 CATECCAY T

SU DOCKET NUMBER EVENT DATE REPO17 CATE

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l015l0l-l01012l91 1018 l 0 l 7 l 71 Sl l 0l 81 Il 517 l 5 l 7 8 57 53 59 60 61 68 69 74 75 e5 EVENT CESCA:PTION gl During nomal operation the Auxiliary Operator noted a slight weep in the No. 3 l

7 89 eg c: kharging numn relief valve no::le just above the flange connection to the discharge j

7 89 80

@ hininc.

This was a violation of Technical Snecifications, Section E.4.d. (Yankee Rowe l 7 89 60 Ots Bbnomal Occurrence No. 75-07).

Charging was transfered to No.1 charging pump.

The l

7 89 E

g l flanged relief valve was replaced and the No. 3 charging pump was returned to service.O 7 89 FmE 80 SYSTEu CAUSE COMDONENT CCVFONENT CCCE CCCE COVDONENT CODE SUNUER MANUFACTUREA VCKATON l pl Cl [E_]

l Vl A l Ll \\1 E I X l lAl l Cl 7l1 l0 l lY l 07 7 89 10 11 12 17 43 44 47 48 CAuSd DESCRIPTION lThe no::le to flange weld crack on the relief valve was attributed to vibration caused l 5

7 89 80 a3 [by the positive displacement charging pumps. An investigation has been initiated to l

7 8S 80 g l remedy the vibration problem associated wtih the charging pumps.

l pac:ury METHOD OF S?ATuS

% POWEA OTHEA STATUS O!SCOVEAY D!SCOVERY DESCAPTON lE l l0 l9 l 8 l l

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[a_j l Routine Operator Tour l

11 7 8

'9 10 12 13 44 45 46 80 FC PM CF A CTrv:T v C 5. TENT FILEASED CF AELE ASE AMOUNT OF ACTIVITY LOCATCN OF PELEASF 5

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7 8 9

10 11 44 45 80 FEASONNEL EXPOSUAES NUYSEA iTCE CESCA PTON 13 l0l0l0l y l XA l

7 85 11 12 13 80 FEASONNEL INJUR:ES MYEEA CESCPT CN l0l0l0l l XA l

1A 7 85 11 12 80 CFFSITE CONSECUENCES i

15 l XA l

7 ES 80 LCSS DA DAMAGE To FACILITY TvFE CESCA PTCN 1 ~

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7 89 10 80 PUBLtCITY l K4 l

17 7 89 80 ACCmCNAL FACTORS 1:2 !

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7 89 80 J. L. Staub 413-625-6140 NAvz:

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NRP DISTRIBUTION FOR PART 50 DOC"9T MATERIAL tg..

(TEMPORARY I ORM) V CONTROL NO: N '7 '7 O FILE: II: CIDE!TT REPORT FI&

FROM: Yankee Atomic Elcetric DATE OF DOC DATE REC'D LTR TWX RPT OTHER Rowe, Mass 8-15-75 8-18-75 EX TO:

ORIG CC OTHER SENT AEC PDR E

Mr 0"Reilly none signedd SENT LOCAL PDR H

CLASS UNCLASS PROPINFO INPUT NO CYS REC'D-DOCKET NO:

roococ 1

50-29 DESCRIPTION:

ENCLOSURES:

Ltr trans the following:

Abnormal Occurrence #75-07 on 8-7-75 cencerniri failure.of the 93 charging ~ pump relief valve nozzle....

ACgy0"7MDGED DO N0m pm.10VE 1

PLANT NAME:

Yahkee Rove FOR ACTION /INFORMATION 8-18-75 chf BUTLER (L)

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