ML19317G729

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Model Tech Specs 3.6.1 & 4.6.1 Re Limited Condition for Operation & Surveillance Requirements for Hydraulic Snubbers
ML19317G729
Person / Time
Site: Rancho Seco
Issue date: 12/19/1975
From:
NRC COMMISSION (OCM)
To:
Shared Package
ML19317G727 List:
References
NUDOCS 8004010556
Download: ML19317G729 (5)
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Text

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4.6.I Pydraulie Snu'..bers i.6.1 flydraulic Snubbers The follo;;ing surveillance requirements 1.

During all modes of operation apply to all hydraulic. snubbers listed except Cold Shutdown and Refuel, in Tabi c 3.6.1.

all hydraulic snubbers listed in Table 3.6.1 shall be operable except as noted in 3.6.1.2 through 1.

All hydraulic snubbers whose seal material has been dcaunstrated by 3.6. I.4 below.

operating experience, lab testing 2.

From and af ter the tir'c that y analysis t be cetpatibic a hydraulic snubber is deternined w2th the operating environment to be inoperabic, continued shall be visually ins;ected.

1his reactor operation is permissibic inspection shall include, but not only during the succeeding 72 necessarily limited' tc, inspection hours unicss the snubber is sooner of the hydtculic fit.id reservoir, made operabic.

fluid connections, and linkage connecticas to the piping and 3.

If the requirements of 3.6.1.1 anchor to verify snuRer operabilit; in accord ince with the following and 3.6.1.2 cannot be net, an orderly shutdc :n shall be initiated s ch edul e.'

and the reactor shall be in a cold shutdown conditica within Suaber of Snabber,s Next Required 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.

FounJ Inoper:.ble Inspection During In yection Intcrval If a hydraulic snubber is determinc d er buiung Inspectica 4.

to be inopcrabic while the re:.cier I n. crv a l is in the shutdown or refue] tode, 10 canths i 2 5 ',

the snubber shall be cade opert.ble o

12 tenths 4 253 prior to reactor starttra, I

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6 months 1 25%

2 124 d"7S 1 251 Snubbers may be added to safetv 3I 5.

related systers without prior '

5,6,7 62 days

+ 25%

25S Licence Amendncnt t o 'I abl e 3.6.1 31 days 4

ls provided that safet:. cvaluations, documentation and reportin" are The required inspcetion interval provided in c.ccordance with 10 shall not be icngth;ned more than CFR 50.59 and that a revision to one step at a tir.e.

Tabic 3.6.1 is included with..

subsequent License. tend:sent Snubben s r.ay be ent er.orized in "accessibic" or request.

two p.roups, "inacces sible" bast.' en their accessibility for inspection during reactor op.' ation.

be inspectcd These tuo groups.

independently according to the I

O D {uI above schedule.

hydraulic snubbers whose scal' 2.

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materials are 6thc: than ethylene propylene or other t.at erial that I

jv; has been deconstra:ed to be co: pat ib)c with the cperat in:t envilo:r:.ent shall be vi: ually inspect ed for operability every 31 days.

R 0 04 010 SW 1

4.6.1 y' draulle Snubbers (ctnt 'd) 3.

The initial inspection shall bc performed within 6 months frca the date of issuance of thesc specifi-cations. For the purpose of enterig the schedule in Speci.^1 cation 4.6.1.1, it shall be assumed that the facility had been on a 6 month inspection interval.

4.

Once cach refueling cycle, a repre-sentative sar.iple of 10 snubbcrs or approximately 10% of the snubbers, tdiichever is loss, shall be functionally tested Tor operability including verification of proper piston movement, lock up and biced.

For each unit and subsequent unit found inoperable,.n additional 10% or ten snubbers shal.: be so tested unt31 no nore friiurcs are found or all units have been test 9

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BASES::

3.6.I and~4.6.I-Lilydraulic Snubbers (cont'd).

7 compounds, which should give satisfactory perforn.ance under the nost severe condition-r

. expected in reactor. installations.

To further increase the assurance of snubber relinbility, functional tests chould tic perforr.cd onco cach refuelinr. cycle. These. tests will include strokinn of the s nubbers to verify pro;)ct pisten ::.ovement, lock-u;) and biced._ Ten perceht or t en _ snubbers, whichever is Icss, represents an adequat e s...aple for such tests.

Observed failures en these sar..ples should requirc. testing of additional u, nits.

Those snubbers designated in Tabic 3.6.1 ns being in high radiition arcas o'r c specially difficult to re::oce need not be sc1ceted for functional tests previded operability was previously verified.

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_.3 (1). Report ll. R.1;ri~c.~io':i, iterr,en l'at erson to K. II. Coller, i;! C, ~ 0etobdr 7,.1974--

Sub,iect :

Ilydraulie Shoel Sway Arrestors-

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