ML19308D916

Proposed Tech Spec 15.4.11 Re Snubber Surveillance Program

ML19308D916
Person / Time
Site:	Crystal River
Issue date:	04/04/1974
From:	FLORIDA POWER CORP.
To:
Shared Package
ML19308D914	List: ML19308D913 ML19308D916
References
NUDOCS 8003200666
Download: ML19308D916 (1)

Text

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15.4'.11. Hydrculic 6nsck Supprssscra (Snubbara) . Incpsetien , ,

Applicability Applies to. hydraulic shock suppressors (snubbers) in the 'following systems:

, a. Decay Heat Removal j, b. Makeup and Purification  ;

i c. Core Flood

d. Reactor Building Emergency Cooling

-. e. Reactor Building Spray -

f. Main steam up to and ine.luding main str.am isolation valves.

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. g. Reactor Coolant System Objective .

To specify the frequency and type of examination which assures the continued integrity of the hydraulic snubbers.

Specification A. Inspection will be visual. '

l B. Ten percent of the snubbers in each system will be inspected each refueling outage.

C. Any seals found leaking will be replaced.

D. At the end of five years, 50% of the snubbers in each system will have been inspected.

E. At the end of 10 years,100% of the snubbers in each system will have been inspected.

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F. The results of all inspections and any action taken will be

. reported to the AEC Directorate of Licensing.

l Bases-f Inspection of. hydraulic shock suppressors (snubbers) in nuclear power plants has j revealed that a large percentage of the seals were defective and that defects can 4 recur, t

Defects have occurred when a millable gum polyurethane containing plasticizers and additives has been used as a seal in conjunction with silicone based hydraulic

• fluid. -Although these materials are not used in the Crystal River safety-related systems, inspection of all snubbers is required.

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. . References f

AEC letter to Mr. J.T. Rodgers dated December 5,1973.

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