ML19308A502

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Abnormal Occurrence 74-20:on 741030,during Reactor Bldg Insp Hydraulic Shock Suppressor PR-50 Found Empty of Hydraulic Fluid.Caused by Loose Main Cylinder Lock Nut Permitting Cylinder to Rotate & Break.Fitting & Fluid Replaced
ML19308A502
Person / Time
Site: Three Mile Island Constellation icon.png
Issue date: 10/31/1974
From: Herbein J
METROPOLITAN EDISON CO.
To:
References
NUDOCS 7910250713
Download: ML19308A502 (1)


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/ M ETP.OFOLITAN EDISON COMPAMY sus:wanv or cenem recuc ununes conou ncu YJT OFFICE UCX 400 toilDDLETOWN. PENNSYLVANIA 17C67 TELEPHON5717-c44 4rA1 Octch::r 31,1974 D D wo o

i r J.P. O'Reilly, Director qD.

_ [Ig .}k A Directorate Of Regulatory c dli .J_ -Q Region I 531 Park Avance King Of Prussia, Pa. 19 @ 5 Operating License D?R-50 Docket 50-209

Subject:

Abnenml Occurrence fio. f.3 74-20 C-aar !!r. O'Railly:

This telegram is to cenfirm the talecen betucan t.ee Spesscrd (Recica I-AE),

and J.J. Colitz (Tf!I-Unit 1 Superintendent) at 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br />, Octcber 31,1974.

The following report is submitted in accordance with paragrcph 6.7.2.a.4 (page 6-11) of the technical specifications.

During an inspection of the reactor building on October 30, 1974, hydrculic shock suppressor, nucer Pb50, located on the pressurizar electron; tic relief valvo discharge line, et:s found errpty of hydraulic fluid.

The r:ain cylinder le:k nut was loose which parmitted the cylinder to rotste approxirately 900, hit another pipa which caused a connection betucen the reservoir and the lydraulic cylinder to break and drain the hydraulic fluid.

Tne broken fitting t as replaced, the hydraulic fluid was replaced, the suppecs-sor reoriented and the lock nut tightened.

The failed suppressor has a 2V' cylinder with a 5" piston stroke which was ranufactunid by Grinnel.

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.Jery t,ntly ygurs,

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/ } $b  :$ ._

// J.m. terbein f./ Statica Suparintendent Ja,rs 79102507/3 8