ML20086Q373

Draft Tech Specs Re Seismic Hydraulic Snubbers on safety-related Sys

ML20086Q373
Person / Time
Site:	Peach Bottom
Issue date:	03/14/1974
From:	PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
Shared Package
ML20086Q359	List: ML20086Q356 ML20086Q373 ML20086Q380
References
NUDOCS 8402270527
Download: ML20086Q373 (3)

Text

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LI!GTD:G CG:DITIC;S FOR OPERATIC! SURVEILLUICE REQUIRE C:TS 3.11.D. Seismic hydraulic dnuecers h.11.D. Scic=le liyaraulic Snubbers On Safoty ilclated systens On Safety Related bystens 1 During reactor pcuor operation, the 1. All hydraulic snubbers installed hydraulic anubbers installed on on safety related systens shall be safety rel'ated piping systens r:ust visually inspected at the follcwing be operabic except as specified in frequency:

Spec. 3.11.D.2. .

a. Whenever the reactor is shut down for 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or longer and the snubbers have not been inspected for 30 days.

b. The maximum inspection interval of accessibic units shall be 6 months.

2. If acccasible hydraulic snubbers on 2. If the results of the inspection safety related systems are observed perfomed at the frequency required to be inoperabic at times other than. by Specification h.11.D indicate the prescribed surveillance, continued reliable snubber operation for one operation is pemissible for a period refueling cycle, the frequency of of seven days. If the defective inspection can be decreased to once snubbers have not been repaired within per refueling cycle.

that period the reactor shall be shut dcun.

3 The reactor shall not be started 3 Once per operating cycle a 2-1/2" up with any safety related snubbers snubber installed in a location known to be inoperable. representative of the worst environmental conditions shall be removed and. disassembled for the purpose of inspection for seal degradation.

8402270527 740314 PDR ADOCK 05000277 PDR _ 1 ,, .

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- ** V O 3.11 Bases D. Seismic Hydraulic Snubbers On Safety Related Systems Hydraulic snubbers are necessary on safety related system piping to restrain seismic motion and yet allow unrestrained thermal growth.

Should a defective hydraulic snubber be discovered during reactor operation seven days is a reasonabic time for repair without af fecting operation. This allowance is justifiabic since the probability of a seismic event during this period is considered low.

4.11 Bases D. Scismic Hydraulic Snubbers On Safety Related Svstems A pariodic inspection is required to establish their reliability and the compatibility of the scal materials with the hydraulic fluid and the operating environment.

It is considered that continued proper operation through one operating cycic and satisfactory findings of periodic inspections is sufficient justification to extend the inspection interval. The interval of once per operating cycle will minimize the effcets on power operation.

, Disassembly of a snubber installed in a location representative of the worst environmental conditions will provide an indication of the degree of hydrualic cylinder seal degradation.

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6.7.2.c Reportine nesults of Inspections of

, Seismic Hycraulic Snuocers

. 1. Notification of significant findings of inspections of hydraulic snubbers shall be made promptly by telephone to the Directorate of Licensing. If defective i snubbers are identified, a written report shall be submitted to the Director, Directorate of Licensing within 10 days following cor.pletion of the inspection.

If no defective snubbers are identified, the written

, report should be submitted within 30 days following the completion. of the inspection.

j 2. The written report should include:

a. As appropriate, a description of the mode of failure, corrective action and tests performed

to detemine the adequacy of the repair.

b. A description of the program for the developr.ent and subsecuent installation of a pomanent nodifi-cation to the hydraulic snubber installation to assure proper operation. 'Ihe description should I

include the technical basis for the conclusion 1

that deficiencies have been resolved.

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