ML18139B093

Tech Spec 4.17 for Shock Suppressors (Snubbers)

ML18139B093
Person / Time
Site:	Surry
Issue date:	09/14/1976
From:	VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML18139B092	List: ML18139B091 ML18139B093
References
NUDOCS 8102250562
Download: ML18139B093 (2)

Text

' . ,._

9-14-76 4.17 SHOCK SUPPRESSORS (SNUBBERS)'

Applicability Applies to all hydraulic shock quppressors (snubbers) which are required to protect the reactor coolant system and safety related systems.

Objective To specify the minimum frequency and type of surveillance to be appl~ed to the hydraulic snubbers listed in Table 4.17-1 and 4.17-2.

Specification A. All hydraulic shock suppressors whose seal material has been demonstrated by operating experience, lab testing or analysis to be compatible with the operating environm~ut shal.l be visually inspected.

This inspection shall include but not necessarily be limited to, inspection of the hydraulic-fluid reservoir, fluid connections, and linkage connections to the piping and anchor to verify snubber operability in accordance with the following schedule:

Number of Snubbers Next ~.esuired.

. Found In?perable During Inspection Inspection or During Interval Inspection Interval 0 18 Months + 25%

1 12 Months+ 257.

2 6 Months+ 257.

Amendment No. 25

• e I *~ t.#,, l.?1.

.  :~.* *~

4.17-2

' ,. . :' TS 9-14-76 3, 4 124 Days *+

- 25%

l~ .

\._,. S,6, 7 62 Days +/- 25%

31 Days +/- 25%

-8 the required inspection. interval shall not be lengthened more than one step at a time.

Snubbers may be categorized into two groups, "accessible" or "inaccessible" based on their accessibility for inspection during reactor ope~ation. These two groups may be inspected independently according to the above schedule.

B. All hydraulic snubbers whose seal material are other than ethylene propylene or other material that has been demonstrated to be compatible with the operating environment shall be visually inspected for operability every 31 days. 39 C. . the initial inspection shall be performed. within 6 months from the date of issuance of these specifications. For the purpose of enter~g the schedule into specification 4.17-A, it shall be assumed that the facility had been on a 6 month inspection schedule.

D. Once each refueling cycle, a representative sample of 10 hydraulic snubbers or approximately 10% of the hydraulic snubbers, whichever is less, shall be functionally tested for operability including verification of proper piston movement, lock-up and bleed.

Amendment No. 25