ML20086Q380

Responds to AEC Requesting Determination Re Use of Bergen-Patterson Hydraulic Shock Suppressors & Restraints in Safety Sys.W/Exception of Lateral Restraints,All Supports Spring Loaded or Rigid

ML20086Q380
Person / Time
Site:	Peach Bottom
Issue date:	08/03/1973
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Giambusso A US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20086Q359	List: ML20086Q356 ML20086Q373 ML20086Q380
References
NUDOCS 8402270530
Download: ML20086Q380 (1)

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.',' ... PHILADELPHIA ELECTRIC COMPANY 50-277

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, 2301 MARKET STREET 8 s,

h[N PHILADELPHI A. PA,19101

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, /,) ,12151 841 4oo0 Qx g August 3, 1973

<// g Q Mr. A. Giambusso Deputy Director f or Reactor Projects Directorate of Licensing U.S. Atomic Energy Comnission Washington, D. C. 20545

Dear Mr. Giambusse:

This is in response to Mr. James P. O'Reilly's letter of July 27, 1973 requesting Philadelphia Electric Company make determinations relating to the util-ifation of Bergen-Patterson hydraulic shock suppressors and restraints in safety systems within the facility. The telephone report requested in .the letter was made by the writer to Mr. Donald Caphton of the Region I Office on July 30, 1973 We have reviewed the type of pipe and vessel supports used on all safety related sys tents, including the primary heliun system, auxiliary helium system, feedwater and steam system, emergency cooling systems, and critical service water system. With the exception of the lateral restraints on the steam generators, all supports are either spring loaded or rigid supports. Both steam generator vessels are equipped with four hydraulic type lateral restraints (two 6" diameter x 1 1/2 stroke, and two 8" diameter x 2" stroke) supplied by the Bergen Pipe Support Company . The hydraulic cylinder was manuf actured by the Ledeen Corporation. ,

The fluid systems on all the hydraulic restraints mentioned above are dynamic, in that, a supply of fluid is availabic to both sides of the piston from a head tank. Leakage from the shaft seals is collected, drained to a collection,

tank and automatically returned to a head tank that maintains a constant supply of fluid. Low 1cvel alarms are provided on the head tank to ensure an adequate supply of hydeaulic fluid. The operability of this alarm and the hydrau1ic supply system is verified approximately once per shift. In view of these design and monitoring features, we believe loss of fluid is precluded and operability of the steam generator restraints is assured.

Sincerely,

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3402270530 740314 M ~

PDR ADOCK 05000 H.[.Cooney 8 Ass't. General Superintendent , /j Generating Division }q-

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-cc: J. P. O'Reilly, Directorate of Regulatory Operations, Region I )

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