ML19261F256

Nonroutine 30 Day Rept 75-03,advising That Heated Post Gap Measurements within Acceptable Values.Test Schedule Change Warranted from Weekly to After Each Startup,Once Full Steam Equilibrium Reached & on Monthly Basis Thereafter

ML19261F256
Person / Time
Site:	Three Mile Island
Issue date:	12/14/1976
From:	Arnold R METROPOLITAN EDISON CO.
To:
References
75-03, 75-3, GQL-1437, NUDOCS 7910250691
Download: ML19261F256 (2)

Text

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FitOM: METROPOLITAN EDISON CO. CA rt OF OSCuMP.T yo. MI['RIED i READING, PA. 12-14-76 __

R,C. ARNOLD DATE 3ECEiVE O 12-20-76 iNeur ecru Nuu ne.a or copiss +>tes. s e o

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i cg s t esir TIO N E N OLC SU F< E LTR. RE. THEIR 5-2-75 LTR... nm NONROUTINE 30-DAY REPORT TOR # 76-03, ADVISING DO NOT uar0VE THAT THE GAP MEASUREMENTS HAVE ?EEN WITHIN ACCEPIABLE VALUES..... r g.

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PLANT NAME: THREE MILE ISLAND # 1 ,

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-4 Director Attn: "r.ofRobert Nuclear W. Reactor Regula-Jct;g lO73 > C '

Reid, Chief Operating Peacters Brancl- #L . [, .-

U. S. Nuclear Reculatory Cermissicn gd n e'

Washingten, DC 20555 ,'s Q' {-j ',, .f:

Mr. J. F. O'Feilly, Director Office of Inspection & Enfercement, Reg.1 (,

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U. S. Nuclear Regulatcc Cc=missien 'q.j , --

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King of Prussia, Pennsylvania 19L06 Gentlemen:

"'hree Mile Island Nuclear Staticn, Unit 1 ("!:I.-1)

Operating License No. DFF-50 Occket No. 50-289 Nonreutine 30-Day Report 75-03 In car letter GQL 1021 of May 2, 1975, we ec==itted to a program of weekly inspections to verify that the gaps in the heated post uupports for the rain steam safety valve discharge piping did not exceed specified values.

All gap measurementa since that time have been within acceptable values, with enly one exception on Dece=ter k, 1975 Review of reasuremente taken since then reveal that this gap has not exec-ied the acceptable 0.01561 inches since Dece=ter 26, 1975 It has alv been noted that the greatest =easured gaps occur near the time of plant startup cr shutdevn.

In view of this evidence, Met-Ed intends to take these uasurements after each reacter start-up once full power ecuilibrium steam p' essure and temperature have teen attained, and =cnthly thereafter.

Sincerely, R. C. .rncld Vice ?"esident RCA:JJ'!: eg 1481 a68 2

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