ML20141F308

Proposed Tech Specs,Changing TS for ECCS Venting

ML20141F308
Person / Time
Site:	Byron, Braidwood
Issue date:	06/24/1997
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20141F306	List: ML20141F304 ML20141F308
References
NUDOCS 9707020230
Download: ML20141F308 (9)

Text

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ATTACHMENT B-1 9707020230 970624 PDR ADOCK 05000455 P

PDR (P:\97byltrs\970152. doc)

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SURVEILLANCE REQUIREMENTS 4.5.2 Each ECCS subsystem shall be demonstrated OPERABLE:

'a. At least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> by verifying that the following valves are in the indicated positions with power to the valve operators  !

removed: l Valve Number Valve Function Valve Position MOV SI8806 Suction to the SI Open 1 Pumps MOV SI8835 SI Pump Discharge Open*

To RCS Cold Legs MOV SI8813 SI' Pump Recirculation Open To The RWST MOV SI8809A RHR Pump Discharge to Open*

RCS Cold Legs MOV SI88098 RHR Pump Discharge to Open*

RCS Cold Legs MOV SIB 840 RHR Pump Discharge to Closed RCS Hot Legs MOV SI8802A SI Pump Discharge to Closed RCS Hot Legs MOV SI8802B SI Pump Discharge to Closed RCS Hot Legs g -

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b. At least once per 31 days by:

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1) Venting the ECCS pump asingshnd-ds p g g pointjf vent outside of containmen and yafve3

2) Verifying that each valve (manual, power-operated, or d

automatic) in the flow path that is not locked, sealed, or otherwisesecuredinposition,isinitscorrectpositiog I c. m By a visual inspection which verifies that no loose debris (rags, trash, clothing, etc.) is present in the containment which could be transported to the containment sump and cause restriction of the pump suctions during LOCA conditions. This_ visual inspection .sjia11 be performed: -

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.f3uominve.g;in A es.c+hese ec -+1on of %e we-pg cyis upu sof w * ;

& d' vge. check valvc ne sh nan 3 + pov+ ion o-f 9he_. l Pi pin 3 P #A% of Ae ,J,SIE801 A and '$ at %e asroHI l va\ve, and ne- Pi P I "3 at 4he acvem valvc if +he J3 c V y I pump is latep.p nly. y YRON - UNIT 2 3/4 5-4 b AMENDMENT NO 40--

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, BASES ECCS SUBSYSTEMS (Continued) loads.

During normal operation, this exclusion would apply to the High Head Safety Injection subsystem. During shutdown cooling operation, the exclusion would apply to the single required centrifugal charging pump and operating RH pump, in addition to the ECCS piping in connunication with the operating pumps.

Because the centrifugal charging pumps are not equipped with pump casing vent valves, and the pump design and system piping configuration allow the pumps to be maintained pumps under positive pressure when in standby, manual venting of these is not required.

The surveillance requirement to ultrasonically examine selected portions of piping involves the idle CV pump discharge pi valve on the pump discharge and miniflow lines,and pingthe upstagnant to the first checkof the portion piping upstream of the ISIB801A/B adjacent to the vent valve ISIO45. This will provide added assurance that the piping is water solid.

7 p.

BYRON - UNITS 1 & 2 B 3/4 5-2a AMENDMENT N0.-9tP-

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i INSERT A For Unit 2, Surveillance Requirement 4.5.2.b.1 requires that the RH and Si pump casings and discharge piping high point vent valves be vented on a 31 day frequency. This venting surveillance does not apply to subsystems in communication with operating systems because the flows in these systems are sufficient to provide confidence that water hammer which could occur from voiding would not result in unacceptable dynamic loads. During shutdown cooling l operation, the exclusion would apply to the operating RH pump, in addition to the ECCS piping in communication with the operating pump.

The TS 4.5.2.b.3 surveillance requirement to ultrasonically examine selected portions of piping involves the idle CV pump discharge piping up to the first check valve on the pump discharge and miniflow lines, the stagnant portion of the piping upstream of the 2Sl8801A/B adjacent to the vent valve 2S1045, and the piping at the 2CV206 valve if the 2B CV pump is idle. This examination will provide added assurance that the piping is water solid. 1 o

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ATTACHMENT B2

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i 4 EMERGENCY CORE COOLING SYSTEMS

' SURVEILLANCE REQUIREMENTS i

j 4.5.2 Each ECCS subsystem shall be demonstrated OPERABLE:

a. At least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> by verifying that the following valves 4

are in the indicated positions with power to the valve operators I removed:

i

Valve Number Valve Function y,alve Position M0V SI8806 Suction to the SI Open l

Pumps MOV SI8835 SI Pump Discharge Open*

! To RCS Cold Legs MOV SI8813 SI Pump Recirculation Open To The RWST

MOV SI8809A RHR Pump Discharge to Open*

j RCS Cold Legs j MOV SI8809B RHR Pump Discharge to Open*

RCS Cold Legs i MOV SI8840 RHR Pump Discharge to Closed i RCS Hot Legs MOV SI8802A SI Pump Discharge to Closed

. RCS Hot Legs 4 MOV SI8802B SI Pump Discharge to Cl l RCS Hot Legs CA b

b. At least once per 31 days by:

[4 j i 1) Venting the ECCS pump as ng an discharge piping high point ved j outside of containeen , and Wtiv d

2) Verifying that each valve (manual, power-operated, or automatic) in the flow path that is not locked, sealed, or otherwisesecuredinposition,isinitscorrectpositiog i c. By a' visual inspection which verifies that no loose debris (rags, 7

!' trash, clothing, etc.) is present in the containment which could be transported to the containment sump and cause restriction of the

{ pump suctions during LOCA conditions. This visual in et sh 11 bo performed: gg g, {g f

• va e l e w s , w w S mmosr% e s __.

heyeramm 4(wM h & cN sysh is fu.Il of aA.r- by uHfA5 H U4//

discham e_ por4,on of A talce pups /e:

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C.h e. ckcC.W. valve k s +n 9 h a n + pe)rt u n o f t m g u. Na m of-+k.a_. a Sh8fo / Abd 6 dA i

4 y ID D-l'Ne@pkwe%g Pi aypcim NI 3/4 -4b AMENDMENT NO. 83 l

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. _ . - . EMERGENCY CORE COOLING SYSTEMS 4

BASES

,ECCS. SUBSYSTEMS (Continued) 1 l which could result in unacceptable dynamic loadings will not occur. During normal operation, this exclusion would apply to the High Head Safety Injection subsystem. During shutdown cooling operation, the exclusion would apply to the j

j single required Centrifugal Charging pump and operating RH the ECCS piping in communication with the operating pumps.Becausepump, the in addition to centrifugal charging pumps are not equipped with pump casing vent valves, and the pump design and system piping configuration allow the pumps to be maintained under positive pressure when in standby, manual venting of these j pumps is not required.

3 f The surveillance requirement to ultrasonically examine selected portions of piping involves the idle CV pump discharge piping up to the first check valve on the pump discharge and miniflow lines, and the stagnant portion of the piping upstream of the 1518801 A/B adjacent to the vent valve ISIO45. This-1 will provide added assurance that the piping is water solid.

i i ,h D6 l

BRAIDWOOD - UNITS 1 & 2 B 3/4 5-2 a AMENDMENT NO. 83

INSERT A For Unit 2, F,urveillance Requirement 4.5.2.b.1 requires that the RH and $1 pump casings and discharge piping high point vent valves be vented on a 31 day frequency. This venting surveillance does not apply to subsystems in communication with operating systems because

, the flows in these systems are sufficient to provide confidence that water hammer which could

, occur from voiding would not result in unacceptable dynamic loads. During shutdown cooling i

operation, the exclusion would apply to the operating RH pump, in addition to the ECCS piping i in communication with the operating pump.

)

! The TS 4.5.2.b.3 surveillance requirement to ultrasonically examine selected portions of piping

! involves the idle CV pump discharge piping up to the first check valve on the pump discharge and miniflow lines, the stagnant portion of the piping upstream of the 2S18801 A/B adjacent to 4

the vent valve 2S1045, and the piping at the 2CV206 valve if the 28 CV pump is idle. This examination will provide added assurance that the piping is water solid.

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.- , Offsite Review Report Form 5 pate: . June 24,1997 i To: Station Manager (s)

Fac:htv Onsite Review No. Offsite Review No.

Braidwood 97-130 20-97-163 Byron 97-088 06-97-197 i

Description:

Supplement to Exigent Technical Specification for ECCS Venting (Byron 2 and Braidwood 2)

The reviewed document is acceptable.

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, (29-97 lb. Bowers Date Offsite Review Group RCLL f44/77 Date R. C. Ward I 4'y/17 Date R. C. Lemke Offsite Review Group Director of Offsite Review cc: Vice President Engineering Safety Assessment Manager / SQV Director System Engineermg Supervisor Reg. Assurance Supv.

Licensing Operations Director File i

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