ML19343B100

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AO 50-29/75-4:on 750311,small Boron Deposit Discovered on Section of Shutdown Cooling Flow Sensing Line.Caused by Pinhole Leak at Weld in Sensing Line
ML19343B100
Person / Time
Site: Yankee Rowe
Issue date: 03/12/1975
From: Autio H
YANKEE ATOMIC ELECTRIC CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19343B099 List:
References
AO-50-29-75-4, NUDOCS 8012040269
Download: ML19343B100 (2)


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March 12, 1975 T

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United States Ato:nic Energy Connission Directorate of Regulatory Operation b

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631 Park Avenue Eing of Prussia, Pennsylvania 19406 g

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Attentiord Reactor Operations Branch a..

Refcicaco:

License No. DPP.-3 (Docket No. 50-29)

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W N rruant to the requirements of Technical Specifications, tt Appendix A, Section E.4.e., an cbnor::tal degradation of one of i

4 the several boundaries designed 'o contain the radioactive natcrials resulting frcu the fu : kn process is reported as

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%y Abnorr:a1 Occurrence 50-29/75-4.

./.t :le'a un 3/11/7; uhila a technician was working on tne shutdown cooling flow instrunentation sensing line, the

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Instrunentation and Control Supervisor noted a s=211 boron a"

deposit resulting from a pinhole leak on a different section of the same lino.

The leak was aircady isolated due to the work

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being done on that lino.

The pinhole leck occurred at a weld in

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the 1/2"-dic;.eter etninless rubing sensing line.

Tht: icah was mall such that nu visible dripping was

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observed cnd it could only be identified by a minor boron buildup.

Therc was no dcncer to either plsnt personnel or hazard to the f

Lcalth and safety of the public.

l Very truly yours, 1

Ycntee-Atatic Electric Company N

12 H. A. Autio Picnt Superintendent

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/*._RIBUTION_FO_R PART 50 DOCKE( ATERI AL NRCDs

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(TEMPOR ARY FORM)

CONTROL NO:

3117 FILE: II:CIDENT REPC?.T FII]

FROM: Yankee Atomic Elec. Co.

DATE OF DOC DATE REC'D LTR TWX RPT OTHER Iutio 3-21-75 3-24-75 XX r

ORIG CC l OTHER SENT AEC PDR XXX TO J.P. O'Reilly None XXX SENT LOCAL PDR CLASS UNCLASS PROPINFO INPUT NO CYS REC'D-DOCKET NO:

XX 37 50-29 DESCRIPTION:

ENCLOSURES:

Ltr. reporting abnormal occurr. # 50-29/75-4 Shutdown cooling Flow Indicator Sensing Linc trans the following...

Leak...

lidI4Ul'R.hidd/E 4 p r s... -.....

ED I I I b1 LItJ.t..O..

PLANT NAME: Yankee Rowe FOR ACTION /INFORMATION VOR 3-24-75 BUTLER (L)

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