ML20085N049

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Proposed Tech Specs 3/4.6.1.7 & 4.6.1.2f Re Action Statements & Surveillance Requirements for Containment Ventilation Sys
ML20085N049
Person / Time
Site: Vogtle  Southern Nuclear icon.png
Issue date: 11/07/1991
From:
GEORGIA POWER CO.
To:
Shared Package
ML20085N046 List:
References
NUDOCS 9111140027
Download: ML20085N049 (7)
v • d • e


Text

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. *l ENCLOSURE 2 (CONTINUED)

V0GTLE ELECTRIC GENERATING PLANT REQUEST TO REVISE TECHNICAL SPECIFICATIONS 3/4.6.1.7 AND 4.6.1.2f 10 CFR 50.92 EVALUATION Based on the preceding analysis, GPC has determined that the proposed change to the Technical Specifications will not significantly increase the probability or consequences of an accident previously evaluated, create the possibility of a new or different kind of accident from any accident previously evaluated, or involve a significant reduction in a margin of safety. GPC therefore concludes that the proposed change meets the requirements of 10 CFR 50.92 (c) and does not involve a significant hazards consideration.

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ENCLOSURE 3 V0GTLE ELECTRIC GENERATING PLANT REQUEST TO REVISE TECHNICAL SPECIFICATIONS 3/4.6.i,7 AND 4.6.1.2f INSTRUCTIONS FOR INCORPORATION The proposed change to the Vogtle Unit 1 and Unit 2 Technical Specifications would be incorporated as follows:

Remove Paae Insert Paog i 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 'I 3/4 6-12 B 3/4 0-3 8 3/4 6 B 3/4 6-4* B 3/4 6-4*

  • 0verleaf page. No change.

E3-1

CONTAINMENT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

P b.

If any periodic Type A test-fails to meet 0.75 L, the test schedule for subsequent Type A tests shall be reviewed and approved by the Commission. If two consecutive Type A tests fail to meet 0.75 L,, a Type A test shall be performed at least every 18 nonths until two -

consecutive Type A tests meet 0.75 L, at which time the above test schedule may be resumed;

c. The accuracy of each Type A test shall be verified by a supplemental test which:
1) Confirms the accuracy of the test by verifying that the absolute value of the supplemental test result, L g, minus the sum of-the Type A and the superimposed leak,o l , is equal to or less than 0.25 L,;
2) Has a duration sufficient to establish accurately the change in leakage rate between the Type A test and the supplemental test; and
3) Requires-that the rate at which gas is injected into the contain-ment or bled from the containment during the supplemental test is between 0.75 La and 1.25 L,.
d. Type _B and C tests shall be conducted with gas at a pressure not less than Pa , 45 psig, at intervals no greater than 24 months except for tests involving:
1) Air locks and
2) Purgesuppfyandexhaustisolationvalveswithresilientmaterial seals,
c. Air locks shall be tested and demonstrated OPERABLE by the require-ments of Specification 4.6.1.3;
f. Purge supply and exhaust isolation valves with resilient material seals shall be tested and demonstrated OPFRA LE by tha requirements of Specification 4.6.1.7. 'AND 4. 6. l 7. 3 ;
g. The provisions of Specification 4.0.2 are not applicable.

V0GTL: UNIT 5 - 1 & Z 3/4 6-3

CONTAINMENT SYSTEMS CONTAINMENT VENTILATION SYSTEM 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 containment purge supply and exhaust' isolation valve shall be closed and sealed closed, and I
b. The 14-inch containment purge supply and exhaust isolation valve (s) shall be closed to the maximum extent practicable but may be open for purge system operation for pressure control, for ALARA and respirable air quality considerations for personnel entry and for surveillance tests that require the valve (s) to be open.

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

a. With a 24-inch containment purge supply an1/or exhaust isolation valve open or not sealed closed, close an's seal that valve or isolate the penetration (s) within 4 hourt, sti,erw'se be in at least HOT STAND 8Y within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> 4na in COLD SHUTDOWN 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 sepply and/or exhaust isolation valve (s) open for reasons other than given in Specification 3.6.1.7b above, close the open 14-inch valve (s) 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 STAND 8Y 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 SHUTDOWN within the following-30 hours.
c. u. m. . . .wiis....... , . . , . . , , , , , , . . ~ , . . . ,, . . . . . ..z.. . a. .J. . , . ...y w . . . r .a, he-ing e sessured leskege rete in excese of the limits of Speeffi eetien 4.0.1.7.2, restere the ineperable velve(s) tc OPERAOLE statue IN888T l within 2' heur;, etherwi;; be in et least "0T STAN00Y w;th' the next (

C heur;, end in COLO 5""T00hH within the fe11 ewing 20 heur;. --

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^w SURVEILLANCE REQUIREMENTS 4.6.1.7.1 Each 24-inch containment purge supply and exhaust isolation valve (HV-2626A, HV-2627A, HV-2628A, HV-2629A) shall be verified to be sealed closed at least once per 31 days,

'/0GTLE UNITS -1 & 2 3/4 6-11 7 . . - . . _.

,- f,:

Insert 1

c. With a Type C leakage test on the containment purge supply and/or exhaust penetrations exceeding 0.06 La,-but the combined leakage 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:

1.. Restoring the affected valve (s) to OPERABLE status, or

2. Isolating each affected penetration by deactivating both of the inner or outer OPERABLE isolation valves as applicable, or
3. - Isolating each affected penetration by insertion of at least one-blind flange outside of containment.

Otherwise, be in at least HOT STANOBY 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' SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

d. With a containment purge supply and/or exhaust isolation _ valve (s) having a measured leakage rate by either the Type C test or the between valve test such that the combined leakage rate.

for all penetrations and valves subject to Type B and C.-tests is greater than or equal,to 0.60 La, restore CONTAINMENT INTEGRITY within-I hour by isolating the affected penetration using both the

-inner or both the outer OPERABLE isolation valves as applicable.

Within the next 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />, deactivate the OPERABLE isolation valves.

Otherwise, be in at least hs 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 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

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__ , _ _ _ _ . _ _ _ _ .. - _ . . _ ~ . _ _ _ _ _ . _ _ . _ _ .

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. . . . CONTAINMENT SYSTEMS t SURVEILLANCE REQUIREMENTS (Continued) m

.6.1.7hAtleastonceper3monthsthecontainmentpurgevalveswith-resilient material seals in each sealed closed containment purge supply and exhaust penetration

?:::ur:d p:n;tr;tica leak:g: shall be demonstrated rat OPERABLE by,(:rifying th;t th;-

i: 1 ::

th:r 0.05 y, t:r. pre::grized t; .",.

4.6.1.7. Each 14-inch containment purge supply and exhaust isolation valve (HV-262 , HV-26278, HV-26288,- HV-26298) shall be verified to be closed or open  ;

in accordance with Specification 3.6.1.7b at least once per 31 days.

l pressurizing between the valves to Pa (45 psig).

If a containment purge penetration exceeds its leakage limit, a Type C penetration leakage test

/ shall be performed within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> provided the total combined leakage rate remains less than 0.60 La.

=- = - -- --

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l 4.1.6.7.2 At least once per 24 months each containment purge supply and exhaust penetration shall be Type C tested. Each Type C test shall have a penetration. leakage of less than 0.06 La.

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V0GTLE UNITS - 1 & 2 3/4 6-12  ;

CONTAINMENT SYSTEMS BASES CONTAINHENT VENTILATION SYSTEM (Continued)

The use of the containment purge lines is restricted to the 14-inch purge supply and exhaust isolation valves since, unlike the 24-inch valves, the 14-inch valves are capable of closing during a LOCA or steam line break accident. There-fore, the SITE BOUNDARY dose guideline of 10 CFR Part 100 would not be exceeded in the event of an accident during containment PURGING operation. Only safety-relhted reasons; e.g. , containment pressure control or the reduction of air-borne radioactivity to facilitate personnel access for surveillance and main-tenance activities, should be used to justify the opening of these isolation valves.

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

shall not be exceeded when 1 he leakage fates determined by the leakage integrity tests of these valves are ac ded to the previously determirid total for all valves and penetrations subject to Type B and C tests, gr--

The 5eakage limits for the quarterly 3/4.6.2 DEPRESSURIZATION AND COOLING SYSTEMS c surveillance specified in 4.6.1.7.3 J' are maintained in Section 6.2.6 of the 3/4.6.2.1 CONTAINMENT SPRAY SYSTEM (FSAR ond pro c_ed controlled by pbnt u reA m The OPERABILITY of the Containment Spray System ensures that containment depressurization and cooling capability will be available in the event of a LOCA or steam line break. The pressure reduction and resultant lower containment leakaqe rate are consistent with the assumptions used in the safety analyses.

The Containment Spray System and the Containment Cooling System both provide post-accident cooling 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 restoring an inoperable Spray System to OPERABLE status have been maintained consistent with that assigned otner inoperable ESF equipment.

3/4 6.2.2 SPRAY ADDITIVE SYSTEM The OPERABILITY of the Spray Additive System ensures that sufficient Na0H is added to the containment spray in the event of a LOCA. The limits on NaOH volume and concentration ensure a pH value of between 8.0 and 10.5 for the

.olution recirculated within containment after a LOCA. This pH band minimizes the evolution of iodine and minimizes the effect of chloride and caustic stress corrosion on mechanical systems and components. The solution volume limits (3700-4000 gallons) represent the required solution to be delivered (i.e.. the "eifierea solution volume is that volume above the tank discnarge). These assumptions are consistent with the iodine removal efficiency assumed in the safety analyses.

. 0T'. E ; NITS - 1 & 2 8 3/4 6-3 t

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