ML20148K390

RO 50-29/75-16:on 751129,during Type C Containment Isolation Test,Leakage Detected from TV-409,vapor Container Sys Return Header Isolation Trip Valve.Caused by Valve Seating Surface Degradation.Valve Refurbished

ML20148K390
Person / Time
Site:	Yankee Rowe
Issue date:	12/12/1975
From:	Autio H, Janet Staub YANKEE ATOMIC ELECTRIC CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
RO-50-29-75-16, NUDOCS 8012040440
Download: ML20148K390 (4)

Text

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CE CC T:;:.x, YAliliEE ATODiC El.ECTRIO domPAllY Rowe, Massachusetts 01367 yq,

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.Decaaber 12, 1975

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Mr. J. P. O'Reilly, Director

'T' U.S. Nuclear Regulatcry Cammission u

Office of Inspection and Enforcement Region I 631 Park Avenue j

King of Prussia, Pennsylvania 19406

Subject:

Reportable Occurrence 50-29/75-16 Excessive Leakage from Vapor Conta ner Trip Valve, TV-409

Dear Mr. O' Reilly:

In accordance with Technical Specifications, Section E.2.a.,

the attached Licensee Event Report is hereby submitted.

Very truly yours,

.Q[Cbry.f L bt' s

Herbert A. Autio Plcnt Superintendent JLSjb Enclosure cc:

(40) Director, Office of Ins,,ection and Enforcement U.S. Nuclear Regulatory Lrenission Washington, D. C. 20555 (3)

Director, Office of Management Information & Program Control U.S. Nuclear Regulatory Commission Washington, D. C. 20555

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• 14 15 25 28 30 31 32 CATEGORY 00Cx(T NUMBER EVENT DATE REPORT DATE o i COmr I I

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7 6 57 58 59 60 61 68-63 74 75 80 EVENT DESCRIPTION 7 89 l-o2 lDurina routine Tvne C Containment Isolatica Valvo Surveillance tnstinn nyeos :iva 80

.foTil lleakaae was detected from isolation valvo Tv-409. vanor containnr woatino system I

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@ l Return Heador Isniatinn Trin Valvo-This constitutes a violation of Technical j-7 89 80

@ ISoecification, Section E.2.a. (3) abnormal dearadation discovered in the primary l

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$ Icontainment and is therefore reported as Reportable Occurrence 50-29/75-16 l

7 89 80 peg SYSTEM CAUSE COMPONENT COMPONENT COCf CODE COMPONENT CODE.

SUPPUER MANUFACTURER VOL.ATON

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44 47 48 CAUSE DESCR!PTION l The 4 inch. ASA150 Mason Neilan falve..siittina surfaco had dearaded ta A nnint tnMyj '

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@ l excessive leakage.

The val.a was refurbished and retested satisfactorily.

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7 89 11 12 80 OFFSITE CONSEQUENCES l

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1 7 89 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPT ON H'

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7 89 10 80 PUDLICiTY l

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l 7 89 80 ADDITIONAL FACTORS E I l

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7 89 00 J. L. Staub pgggg; O L E M NAME:

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Decerrber 1,. 1975 9i e

U. S. Nuclear Regulatory Comission "i

Office of Inspection & Enforcement

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631' Park Avenue King of Prussia Pennsylvania 19406 Attention:

Mr. J. P. O'Reilly

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Dear Mr. O'Reilly:

.j-Pursuant to the requirerents of the Technical Specificatio.ts i

Section E.2.a.(3), abnormal degradation discovered in the primary

. L i j containr.cnt is reported as Reportable Occurrence 50-29/75-16,.

During routine Type C, Containment Isolation Valve Tests, excessive leakage was detected from isolation valve TV-409. Vapor Container Heating System Return Header Isolation Trip Valve.

A 14 day Licensee Event Report will #ollow.

Very truly yours, 4

H. A. Autio Plant Superintendent NNS/.ib cc:

(2) Director, Office of MIPC U.S. Nuclear Regulatory Comission Washington, D. C. 20555 i

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CONTROL NO: 14013j i,

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FILE: IncIDEttr REPOR9 3

l FROM: Yankee Atomic Elec.Co.

DATE OF DOC DATE REC'D LTR TWX RPT OTHERl Rowe, Mass....

h.A. Autio 12-12-75 12-17-75 XXX TO:

OR.lG CC OTHER SENT AEC PDR XYY S NT LOCAL PDR XXX

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~ PROPINFO INPUT NO'CYS REC'D DOCKET NO:

l yyy 49 50-29 D FEC RIPTION'.

ENCLOSURES:

EErter trans the following.......

Licensee Event Repott # 75--16,.on 1.1-29-75 Concerning : cessive Lea.ka'ge:;from Vapor Containeep frip Valve......

40 Cys. Received)"

PLANT NAf4E: Yankee Rowe

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