ML20097H207

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Proposed Tech Specs 3/4.6.1.7 & 4.6.1.2f Re Leakage Testing Requirements for Containment Purge Supply & Exhaust Isolation Valves
ML20097H207
Person / Time
Site: Vogtle  Southern Nuclear icon.png
Issue date: 06/17/1992
From:
GEORGIA POWER CO.
To:
Shared Package
ML20097H200 List:
References
NUDOCS 9206240375
Download: ML20097H207 (5)
v • d • e


Text

ENCLOSURE 3 V0 GILE ELEGRIC GENERATING PLANT REQUEST 10 REVISE TECHNICAL SPEClflCATIONS 3/4.6.1.7 AND 4.6.1.2f IldlBEllDMU_0LEOFDRATIDH lhe proposed change to the Vogtle Unit I and Unit 2 Technical Specifications would be incorporated as follows:

Benove Pang insert.P L qe 3/4 6-3 3/4 6-3 3/4 6-4' 3/4 6-4*

3/4 6-11 3/4 6-11 3/4 6 12 3/4 6-12 B 3/4 6 3 8 3/4 6 3 8 3/4 6-4* B 3/4 6-4*

4

  • 0verleaf page. No change.

E3-1 9206240375 920617 PDR ADOCK 0S000424 P PDR t

' CONT /JNMENT SYSTEMS 5URVEILLANCE P J IREMENTS (Continued)

b. any perioaic Type A test fails to meet 0.75 L, the test schedele for subsequent Type A testr, shall be reviewed and approved by the Commission. If two consecutive Type A tests fail to meet 0.75 L,, a A test shall be performed at least every 18 months ntil two
utive Type A tests meet 0.75 L, at which time the ovE test a

may be r?sumed; h, c. 'e 2 1 racy of each Type A test shall be verified by a supplemental

+

ch: -

5

'wifirms the accucacy of the test by verifying that the

  • ,olute value of the supplemental test result, L c, minus the

s a of the Type A and the superimposea leak,gL , is aqual to or less than 0.25 L ;

a

2) Has a duration suf ficient to establish accurately the change in r leakage rate between the Type A test and the supplemental test; and
3) Recoires that the rate at which gac is injected into the contain- ,

ment or bled from the containment during the supplemental test is Letween 0.75 L3 and 1.25 La '

d. Type ' and C tn b y all be conducted with gas at a nressure not less taan Pa , 45 psig, at intervah i.. Creater than 24 months except for tes'- involving:

l

1) Air locks and S Purgesupp[yandexhaustisoiatienvalveswithresilientnaterial ,

seals.

e. Air locks shall be tested and demonstrated OPERABLE by the require-ments of Specification 4.6.1.3; a
f. Purgesupplyandexhaustisol)tionvalveswithresilie, material seals shall be tested anc g &anstratedJPERABLE by the requirements of Specification 4.6.1.7.2 {n F M D .3)
g. The provisions of Specif:'.ation 4.0.2 are not applicable.

t V0GTLE UNIU - 1 & 2 3/4 6-3

CONTAINMENT SYSTEMS CONTAINMENT VENTILATION SYSTEM n

LIMITING CONDITION FOR OPERATION 3.6.1.7 Each containment purge supply and exhaust isolation valve (HV-2626A&B, HV-2627A&B, HV-2628A&B, HV-2629A&B) shall be OPERABLE and:

a. Each 24-inch contair. ment purge supply and exhaust isolation valve shall be closed and sealed closed, anu
b. The 14-inch containment purge supply ar.d exhaust isolation valve (s) shall be closed to the maximum extent practicable but may be open for surge system operation for pressure control, for ALARA and respirrble air quality considerations for personnel entry and for surveillance tests that require the valve (s) to be open, j

/

APPLICABILITY: MODES 1, 2, 3, and 4.

ACTION:

a. With a 24-inch containment purge supply and/or axhaust isolation valve open or not sealed closed, close and seal that valve or isolate the penetration (s) within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, otherwise be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUT 00WN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
b. With the 14-inch containment purge supply and/or exhaust isolation 3

valve (s) open for reasons other than given in Specification 3.6.1.7b o above, close the open 14-inch valve (s) or isolate the penetratior.(s) b within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, ctherwise Le in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and in COLD SHOTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />, _

c. U't', a centcinacnt purg ;upply and/cr ;xhaust i;clatica valvc(;)

-having-e m;;sured leakag; rate in excess of the limits-of-E9ecifi

tion 4.5.1.7.i', restorc the inapeceble valva (s) ta OPEIiAOL status i#"24h"" "h"" ';i""""
  • 27^"* "* * =

fNSERTP*t "C hours, and in COLO $UUTOOWN .ithin the fel's.in; 00 huwcs.

s~ -^

Q _ _

SURVEILLANCE REQUIREMENTS

. 4.6.1.7.1 Each 24-inch containtr.ent purge supply ar.a exhaust isoiation valve (HV-2626A, HV-2627A, hV-2628A, HV-2629A) shall be verified to be sealed closed at least once per 31 days.

a V0GTLE UNITS - 1 & 2 3/4 6-11

INSERT 1

c. With a Type C leakage test on the containment purge sg y and/or exhaust penetrations exceeding 0.06 La, but the combineo ,eakage rate for all-penetrations and valves subject to Type B and C tests less than 0.60 La, reduce the leakage to less than 0.06 La within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> by either re;toring the affected valve (s) to OPERABLE status, or isolating each affected penetration by insertion of at least one blind flange outside of containment. Otherwise be in at least HOT STANDBY within the neit six hours, and in COLD $HJTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
d. Wit'; a containment purge supply and/or exhaust isolation valve (s) having a measured leakage rate by either the Type C test or the between valle test such that the combined leakage rate for all pentrations and valves subject to Type B and C tests is greater than or equal to 0.60 La. restore CONTAINMENT INTEGRITY within I hour or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and COLD SHUTDOWN within the following 3J hours.

t l

l l-

--- - - . _ - - . .~ . - - - - _ _ - . - - - ___- . . - . . - - --

CONTAINMENT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 4.6.1.[ hat least once per 3 months the containment purge valves with resilient material seals in each sealed closed containment purge supply ind ,

exhaust penetration shall be demonstrated OPERABLE by verifying that +.he '

measuredpenetrationleakagerateislessthan0.06Lydcrp::n-f::dtoI,.

4.6.1.7h[)Each14-inchcontainmentpurgesupplyandexhaustisolationvalve (HV-26268, HV-26278, tiV-2628B, HV-2629B) shall be verified to be closed or apen in accordance with Specification 3.6.1.7b at least once per 31 days.

~-~m_ -

ypressuring be}weer1 Me valves to fh. Ira emlatninnf purge penetrafion exceccLs its requiralacfintimit, a Type C P Ica ka.1e com 6;ned leakales f s/n/l bc xtivemad wdhir) 24 /wurs g<wided f/n lofal

, ge rat [e rent ains less Ihari 060 La.

ll. (o..).l.) A tl leaJl 0ACL fer EYP106f$5 e4c}i crnfal4menf p;sege 4ypp j, .;e;c) uhaust peneMifurt sds// de 7)pe C k.cfed. Eech Trpe C /a?.rdsbut '

penc/mfion .j

~ /eatofe ei kss Men 0,OA la._-

V0GTLE UNITS - 1 & 2 3/4 6-12

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f rvgutredacfwa limU fie & nmrkth l CONTAlNMENT SYSTEMS { S ut,rilmct yec Wicc/ in ij. g,f.1, 3 ls 1 main /aMed in Sefien 6 2.C, of M- FSM and cu /vv//ed l,4jpgfp,ecegy,y,

%~~a x

-s, BASES, CONTAINMENT VENTILATION SYSTEM (Continued)

The use of the containrent purge lines is restricted to the 14-incn purge supply and exhaust isolatior valves since, unlike the 24-inch valves, the 14-inch valves 3re capable of closirg during a LOCA ca steam line break accident. There-fore, the SITE BOUNDARY doso guideline of 10 CFR Part 100 would not be exceeded in the event of an accident during containment PURGING operation. Only safety-related reasons; e.g. , conta inment pressure control or t e reduction of air-borne radioactivity to facil itate personnel access for sui eillance and main-tenance activities, should t e used ta justify the opening of these isolation valves.

Leakage integrity tests with a maximum allowable leakage rate for containment purge supply and exhaust sup ply valves will provide early indication of resilient material seal degradation ar d will allow opportunity for repair before gross leak-age failures could develop.U The 0.60 L leakage limit of Specification 3.6.1.2b.

shall not be excteded when the leakage fates determined by the leakage integrity tests of these valves are added to the previously determined total for all valves and penetrations subject to Type B and C tests.

3/4.6.2 DEPRESSURIZATION AND COOLING SYSTEMS i

3/4.6.2.1 CONTAINMENT SPRAY SYSTEM The OPERABILITY of the Containment Spray System ensures that containme;:

depressurization and cooling capability will be available in the event of a LOCA or steam line break. The pressure reduction and resultant lower containment ieakarle rate are consistent with the assumptions used in the safety analyses.

The Containment Spray System and the Contair.mant Cooling System both provide post-accident tooling of the containment atmosphere. However, the Containment Spray System also provides a mechanism for removing iodine from the containment atmosphere and therefore the time requirements for lastoring an inoperable Spray System to OPERABLE status have been naintained consistent with that assigned other inoperable ESF equipment.

2/4 6.2.2 SPRAY ADDITIVE SYSTEM ine OPERABILIT( of the Spray Addi*:ve System ensures that sufficient NaOH is added to the containment spray in tne event of a LOCA. The limits on NaOH volume and concentration ensure a pH value of between S.0 and 10.5 for the c!ution recirculated within containment after a LOCA. This pH Land minimizes the evolution ci iodine and minimizes the ef fect of chloride and clustic stress corrosion on mechanical systems anc components. The solution volaie limits (3700-4000 gallons) represent the required solution to be delivered (i.e., the del' m eu solution volume is that volume above the tanA discharge). Tnese assumptions are consistent with the iodine removal efficiency assumed in the safety analyses.

'GTLE UHTS - 1 & 2 E3 4 c-3 A

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