ML20238E835

Corrected Tech Spec Page 4-47c to Proposed Amend 151 to License DPR-54,adding ...Will Be Exceeded Prior to Next Scheduled Snubber Svc Life... to Last Paragraph of Tech Spec 4.14f

ML20238E835
Person / Time
Site:	Rancho Seco
Issue date:	09/08/1987
From:	SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:
Shared Package
ML20238E818	List: ML20238E816 ML20238E835
References
NUDOCS 8709150238
Download: ML20238E835 (2)

Text

__ _

RANCHO SECO UNIT 1 e TECHNICAL SPECIFICATIONS f' / Surveillance Standards 151> . Concurrent with the first inservice visual inspection and at least once per refueling interval thereaf ter, the installation and maintenance records for each snubber shall be reviewed to '

verify that the indicated ~ service life has not been exceeded or '

will not be exceeded prior to the next scheduled snubber service life review. If the indicated service life will be exceeded prior to the next scheduled snubber service life review, the ,

snubber service life shall be,re-evaluated or the snubber shall be replaced or reconditioned so as to extend its service life beyond the.date of the next scheduled service life review. Thi s re-evaluation, replacement or reconditioning shall be indicated

< in the records.

Bases All snubbers are required OPERABLE to ensure that the structural integrity of the reactor coolant system and all other safety related systems is maintained during and following a seismic or other event initiating dynamic loads.

Snubbers _ excluded from this inspection program are those installed on nonsafety-related systems and then only if their failure or failure of the system on which they are installed, would have no adverse effect on any safety-related system.

The visual inspection frequency is based upon maintaining a constant level of snubber protection t.o systems. Therefore, the required inspection interval varies inversely with the observed snubber failures and'is determined by the number of inoperable snubbers found during an inspection. Inspections i performed before that interval has elapsed may be used as a new reference point to determine the next inspection. However, the results of such early inspections performed before the original required time interval has elapsed (nominal time less 25 ) may not be used to lengthen the required inspection i nterval . Any inspection whose results require a shorter inspection interval  ;

will override the previous schedule.

When the cause of the rejection of a snubber is clearly established and remedied for that snubber and for any other snubbers that may be generically susceptible, and verified by inservice functional testing, that snubber may be exempted from being counted as inoperable. Generically susceptible snubbers are those which are of a specific make or model and have the same design features directly related to rejection of the snubber by visual inspection, or are similarly located or exposed to the same environmental conditions such as temperature, radiation, and vibration.

1 When a snubber is found inoperable, an engineering evaluation is performed, in addition to the determination of the snubber mode of failure, in order to oetermine if any safety-related component or system has been adversely 1 affected by the inoperability of the snubber. The engineering evaluation  !

shall determine whether or not the snubber mode of failure has imparted a )

significant effect or degradation on the supported component or system.

! Proposed Amendment No. 151 I

4-47c l

1 8709150238 870908 PDR ADOCK 05000312 P PDR 3

l b

PLANT SYSTEMSL i' . SURVEILLANCE REQUIREMENTS (Continued) (

f. Snubber Service Life Monitoring  ;

A record of the' service' life of each snubber, the date at which the designated service life commences and the installation and mainte-nance records on which the designated service life is based shall be

-maintained as required by Specification 6.10.2.1.  !

Concurrent with the first inservice visual inspection and at least once per 18 months thereafter, the installation and maintenancerecords e. for each sn reviewed to verify that the indicated service life has not been exceeded or will not be exceeded prior to the next scheduled snubbir'.'1 service life review. Iftheindicatedservicelifewillbeexceeded_)  !

prior to the next scheduled snubber service life _ review, the snubb'er.

• service life shall be reevaluated or the snubber shall be replaced ;

or reconditioned so as to extend its service life beyond the dati'of, '

the next scheduled service life review. This reevaluation, replacementorreconditioningshall.beindicatedintherecordsh't T H E. @60VE- u@ER S Co reb WORb5 tVERE

's orY\t TTED l'd 0u4

(

ACGtDENTALLT Prob 5Eh M& /hMENT" 04 0. LS\.

y B&W-STS 3/4 7-24 SEP 171980

{

L-_- _

r - - , - , - - , - - , - - - _ , - - _ _ _ . _ _ _ _ _ _ _ _ ..

e l.

h. .

l l

[

l i g$

Q ~~ A 6

O@

M "

en

'O N

i J