ML20202F420

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Proposed Tech Specs Revising SR 3.6.4.1.2 & Associated Bases to Reflect Changes in Requirements for Secondary Containment Doors
ML20202F420
Person / Time
Site: Peach Bottom  Constellation icon.png
Issue date: 02/04/1998
From:
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
Shared Package
ML20202F419 List:
References
NUDOCS 9802190197
Download: ML20202F420 (5)
v • d • e


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ATTACHMENT 2 PEACH BOTTOM ATOMIC POWER STATION UNITS 2 AND 3 Docket Nos,50 277 50-278 License Nos. DPR-44 DPR-56 TECHNICAL SPECIFICATIONS CHANGES List of Attached Pages Units 2 and 3 TS Page 3.6-35 BASES Page 3.6-76 DNKO!Obbb7 P

PDR i

Secondary Containment 3.6.4.1 1

i 5

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ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME t

C.

(continued)

C.2 Suspend CORE 1mmediately ALTERATIONS.

g AEl l

C.3 Initiate action to Immediately 3

suspend OPDRVs.

i i

SURVE!LLANCE REQUIREMENTS SURVEILLANCE FREQUENCY l

31 days

[

SR 3.6.4.1.1 Verify all secondary containment

- equipment hatches are closed and sealed.

I l

m~

i Qtdcit4 SR 3.6.4.1.2 Veri lyeack.tecondaryr.ontainmentaccess 31 days

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do th M ckfAO in -

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M cu kk,

-den-*:I-lee +::: d::7 :h:". 5: c h::d.

i 4

-SR 3.6.4.1.3 Verify each standby gas treatment (SGT) 24 months on a subsystem will draw down the secondary STAGGERED TEST containment to k 0.25 inch of vacuum BASIS water gauge in s 120 seconds.

t SR 3.6.4.1.4 Verify each SGT subsystem can maintain 24 months on a m 0.25 inch of vacuum water gauge in the STAGGERED TEST secondary containment for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> at a BASIS flow rate s 10,500 cfm.

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PBAPS UNIT 2 3.6-35 Amendment No. 210

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Secondary Containment j

B 3.6.4.1 BASES (continued) i SURVEILLANCE SR 3.s.4.1.1 and Sk 3.6.4.1.2 1

REQUIREMENTS i

1erifying that secondary containment equipment hatches and

_=== != mare closed ensures that the infiltration of b.j g, I g g ; #

outside air of such a magnitude as to prevent maintaining i

the desired. negative priassure does not occur. Verifying l

j or DIlOld k d0r5 that all such openings are closed provides adequate i

y Q ojc Ad assurance that exfiltration from the secondary containment will not occur.

In this application, the term ' sealed" has i

noconn0141191 of leak tightness. Maintaining secondary l

containment O'F.RABILITY requires verifyin6d f=r it the

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+bd &lfhtFdl, weees :;=ig h ch=d,==;t d= Se=== :;=ig h l

g 0g 4 Mnv 3eed fer ad trea;i;;t ;;try =d-twit (t= :t L -h=t =: f=r :=t inia ch=d).

The 31 day Frequency dOO6 in mlh t

for these SRs has been shown to be adequate, based on g; y. g y d w f'l o>erating experience, and is considered adequate in view of tte other indications of door and hatch status that are available to the operator.

5 SR 3.6.4.1.3 and SR 3.6.4.1.4 i

r

]

The SGT System exhausts the secondary containment atmosphere to the environment through appropriate treatment equipment.

To ensure that fission products are treated, SR 3.6.4.1.3 verifies that the SGT System will rapidly establish and maintain a pressure in the secondary containment that is less than the pressure external to the secondary containment boundary. This is confirmed by demonstrating that one SGT subsystem will draw down the secondary containment to I

k 0.25 inches of vacuum water gauge in s 120 seconds. This cannot be accomplished if the secondary containment boundary is not intact.

SR 3.6.4.1.4 demonstrates that one SGT subsystem can maintain m 0.25 inches of vacuum water gauge for I hour at-a flow rate s 10,500 cfs. The 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> test period allows l

secondary containment to be in themal equilibrium at steady state conditions. Therefore, these two tests are used to ensure secondary containment boundt. y integrity.

Since l

these SRs are secondary containment tests, they need not be l

performed with each SGT subsystem. The SGT subsystems are tested on a STAGGERED TEST BASIS, however, to ensure that in i

addition to the requirements of LCO 3.6.4.3, either SGT (continued) e i

T l

PBAPS UNIT 2 B 3.6-76 Revision No. 0 l

m.m.

,-__m

..,..,., ~. -,

,. ~,.,

Secondary Containment 3.6.4.1 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME C.

(continued)

C.2 Suspend CORE 1mmediately ALTERATIONS.

AliQ C.3 Initiate action to Immediately suspend OPDRVs.

SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.6.4.1.1 Verify all secondary containment 31 days equipment hatches are closed and sealed.

=n

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SR 3.6.4.1.2 Verifyeeeksecondarycontainmentaccess 31 days d

are clonb in Moors is-eleted, :::::;t d.:: tho-ascess.

,9 _4,_ g 4,,_,,,4 f; 7 ;7,; 7j ;7,3 ; g OA de laK

.twn-et-least ::: d:: &P. 5 cless SR 3.6.4.1.3 Verifyeachstandbygastreatment(SGT) 24 months on a subsystem will draw down the secondary STAGGEREC TEST con'tainment to k 0.25 inch of vacuum BASIS water gauge in s 120 seconds.

SR 3.6.4.1.4 Verify each SGT subsystem can maintain 24 months on a m 0.25 inch of vacuum water gauge in the STAGGERED TEST secondary containment for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> at a BASIS flow rate s 10,500 cfm.

PBAPS UNIT 3 3.6-35 Amendment No. 214

Secondary Containment 8 3.6.4.1 BASES (continued)

SURVEILLANCE SR 3.6.4.1.1 and SR 3.6.4.1.2 REQUIREMENTS Verifyty=thatsecondarycontainmentequipment-hatchesand aseese _ yre closed ensures that the infiltration of

==

1 OffhedOh w oumae air of such a magnitude as to prevent maintaining the desired negative pressure does not occur.

Verifying l

of'dl g# g){

thatallsuchopentNrationfromtesecondarycontainment s are closed rovides adequate i

r fy) (ynh cle 10(

assurance that exfi l

will not occur.

In this application, the torn " sealed

  • has I

no connelAt19n of leak tightness. Maint ining secondary

+ceess :;a:.bg-4*-elete.d, quires verffyi(

containment OPTRABT m T re

.f h f 6 (t h e 0 //

=:;t 'd.r the Sece:S :;r!=g 14-u__...

m___a

.... u..

. u w vu nh. a t

iMI OF0 I 4M-3i.idb5h 5;E5IseI$5jIThe 31 day' Frequency I

~

()@r5 In 60 for these SRs has been shown to be adequate, based on F d4 M M' o>erating experience, and is considered adequate in view of I

/

t m other indications of door and hatch status that are available to the operator.

SR 3.6.4.1.3 and SR 3.6.4.1.4 The SGT System exhausts the secondary containment atmosphere to the environment through appropriate treatment equipment.

To ensure that fission products are treated, SR 3.6.4.1.3 verifies that the SGT System will rapidly establish and maintain a pressure in the secondary containment that is less than the pressure external to the secondary containment boundary. This is confirmed by demonstrating that one SGT subsystem will draw down the secondary containment to

= 0.25 inches of vacuum water gauge in s 120 seconds. This cannot be accomplished if the secondary containment boundary is not intact.

SR 3.6.4.1.4 demonstrates that one SGT subsystem can maintain k 0.25 inches of vacuum water gauge for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> at a flow rate s 10,500 cfs. The I hour test period allows secondary containment to be in thetsal equilibrium at steady state conditions. Therefore, these two tests are used to ensure secondary containment boundary integrity.

Since these SRs are secondary containment tests, they need not be performed with each SGT subsystem. The SGT subsystems are tested on a STAGGERED TEST BASIS, however, to ensure that in addition to the requirements of LCO 3.6.4.3, either SGT fcontinued)

J PBAPS UNIT 3 B 3.6-76 Revision No. 0

-. - -

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