ML20113G818

Proposed Tech Specs Re Containment Air Lock Door Operability Requirements for Containment Integrity

ML20113G818
Person / Time
Site:	Davis Besse
Issue date:	05/01/1992
From:	CENTERIOR ENERGY
To:
Shared Package
ML20113G815	List: ML20113G814 ML20113G817 ML20113G818
References
NUDOCS 9205120260
Download: ML20113G818 (7)

Text

. _ - - _ .

Docket Number 50-T'e6 License Nunber NPF-3 .

. Serial Number 1971 ,

Attachment Page 9

'OtttN! TION 5 i

REPORTABLE EVENT I 1 1.7 A REPORTABLE EVENT snal) be any of those conditions specified in Sect 1or '

50.73 of 1C CFR Part 50.

CONTAINMENT INTEGRITY _

1.8 CONTAllgENT INTEGRITY shall exist wnent

a. All penetrations required to be closed during accident conditions are  :

eithert

1. Capable of being closed by the Safety Features Actuation Systas.

or

2. Closed by manual valves blind flanges or deactivated automatie valves secured in their closed positions. L. cept tnose approved to be open unser assinistrative controls.

b. All equipmen a_tches are cl_osed and__ sealed t_

aka w;6. % n.gu, M iefso Q_

c. p. - ;mg^. t:) specification 3.6.1.3.

Each airlock ino+N'l ,

d. The containment leakage rates are within the lini'n of 5pecification 3.5.1.2. and ,

e. The sealing mechanism associated with each penet.*ation (e.g., welds, bellows or 0-rings) is OPERABLE.

CHANNEL CALIBRATION 1.9 A CHAluEL CALISRATION shall be the adjustment. As necessary, of the channel output such that it responds with necessary range and accuracy to kasun values of tne parameter wnich the channe) monitors. - The CHAlstEL CAL 18 TAT 10R thall encompass the entire channel including the sensor and alars and/or trip -

functtons, and shall include the CHAlfEL F151CTIORAL TEIT. CHAlelEL CAL 18AAT!0N may se performed by any series of sessential, omriapping or total channel steps suca tast the entire channel is calibrated.

CHANNEL CHECK 1.10 A CHAlpin. CHECK shall be the qualitative assessment of channe) behavior during operation by observation. This determination shall include, unere possible, comparison of the channel indication and/or status with other im:stions and/or status derived from independent in?trument channels measuring tr.'

. Same parameter.

9205120260 920501

_{DR ADOCK 05000346 DAVI5 BEEEE. Un[i% 1-2 Amenenent No. 93.135.147

Docket Nunber 50-346

'icen'se

- Number NPT-3 serial Number 1971

)

Attachment Page 10 .

2/4.6 **!!TAINMENT SYSTE*5 3/a.6.1 :ttMaRY CONTAINMENT CONTAINMENT INTEGRITY j I

l LIMIT!!G CONDITION FOR OPERATION 1,

'!3.6.1.1 Primary CONTAINMENT INTEGRITY sna11 be maintained.

! APPt.!CABILITY: MODES 1. 2. 3 and 4 il '

ACTION:

Nithout crimary CONTAINMENT INTEGRITY. restore CONTAINMENT IMEGRITY within one nour 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 /> ano in COLD SHUTDOWN within tne following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

I .

i SURVEILLANCE REQUIREMENTS 1 4.6.1.1 Primary CONTAINMENT INTEGRITY shall be demonstrated:

I j a. At least once per 31 days by verifying that:

4

1. All penetrations

• not capable of being closed by OPERABLE containment automatic isolation valves and reoutree to be I closed during accident conditions are closed by valves, blind flanges, or deactivated automatic valves secured in

' their positions, except those valves that may be opened under assinistrative controls per Specification 3.6.3.1, and

2. All equipment hatches are closed and sealed.

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'Except valves, blindl langes,4deactlvated automatic valves which

, are located inside th ::Sta.and are locked. sealed. or otherwise l

secured in the closed pos ion. These penetrations shall be verified closed during each CDLD-5HUTDOWN except that verification of these penetrations being closed need not be performed more often than once per 92 days. ,

l.

l Amenament No. t47 L__ ;DAV!$-BESSE. UNIT 1--

- --3/4 6 . _ _- - - - . _ - - _ - - --

1 Docket Number 50-346 Licenas Number NPF-3 5hrial Number 1971 Attachment Page 11 CONTAINMENT SYSTEMS

, CONTAINMENT LEAXAGE D ON1 ON3 l

4 LlHITING CONDITION FOR OPERATION 3.6.1.2 Containment leakage rates shall be limited to:

a. An overall integrated leakage rate of 1 L weight of the containment air per 24 shour , O'.50 at P,, percent by 38 psig.

b. A combined leakage rate of 1 0.60 La , for all penetrations and valves subject to Type B and C tests, when pressurized to P a*

c. A combinM leakage rate of 1 0.03 L for all penetrations that are secondary containment bypals leakage paths, when pressurized to P,.

~

d. A single penetration leakage rate of 1 0.15 La for the contain-f ment purge and exhaust isolacion valve special test.

APPLICABILITY: MODES 1, 2, 3 and 4.

ACTIOJ:

a. With either (a) the measured overall integrated containment leakage rate exceeding 0.75 L, (b) with the measured combined leakage rate for all penetrations and valves subjact to Type 8 and C tests exceeding 0.60 La, or (c) with the combined byp&ss leakage rate exceeding 0.03 La, restore the leakage rate (s) to j within the limit (s) prior to increasing the Reactor Coolant System temperature above 200'F.

b. With a single containment purge and exhaust isolation valve penetration having leakage rate exceeding 0.15 L,; restore the leakage rate to within limits in 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT l

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 SHUTDOWN within the l following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

SURVEILLANCE REOUIREMENTS

(

i 4.6.1.2 The containment leakage rates shall be demonstrated at the following test schedule and shall be detennined in confonnance with the criteria specified in Appendix J of 10 CFR 50 using the methods and provisions of ANSI N45.4 - 1972:

I a. Three Type A tests (Overall Integrated Contairnent Leakage Rate) l shall be conducted at 40 4 10 month intervals during shutdown at P , 38 psig, during each To year service period.

3

._RMM3E. EM5L5L . . _ . . __ 3/ 4._6- 2 Amend %n% N9eE_)lJk160 _

l Docket Number 50-346 License Number NPF-3 Serial Number 1971 l Attachment ]

.Page '12 '

1:

' CONTAINMENT SYSTEMS g SURVEILLANEE REOUIREMENTS (Continued)

Il

b. If aay periodic Type A test fails to meet 0.75 L the test schedule for subsequent Type A tests shall be reviewed an$, approved by the Cornission. If two consecutive Type A tests fail to meet 0.75 L Type A test shall be perfomed at least every 18 months until tw$, a 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. Confims the accuracy of the Type A test by verifying that the difference between supplemental and Type A test data is within 0.25 L3.

l 2. Has a duration sufficient to establish accurately the change in f' leakage between the Type A test and the supplemental test.

3. Requires that the rate at which gas is injected into the contair. ment or bled from the containment-during the supplemental test is ot: ween 0.75 L, and 1.25 L,.

d. Type B and C tests shall be conducted with gas at P 38 psig, as intervalsnogreaterthan24monthsexceptfortest$ involving air locks.

, e. The combined bypass leakage rate shall be determined to be < 0.03 L a

1' by applicable Type B and C tests at least once every 24 months except for penetrations which are not individually testable; penetrations not individually testable shall be determined to have no detectable leakage when tested with soap bubbles while the contain-ment is pressurized to Pa , 38 psig, during each Type A test, w

' - h:kE :h:b be-4e+ted ind &enstrated OPEP1SLE per surUeh4M' -

%cuire ent t.S.:.3. ( pe,le,{ @

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% ___%~ v DAVIS-BESSE. UNIT 1 3/4 6-3 Amendment No. PD.J20,160

Docket Number 50-346

. License Number NPT-3 '

Serial Number 1971 Attac,hment Page 13 i

NMA"0N ON Y -

CONTAINMENT SYSTEMS I SURVE1LI ANCE REQUIREMENTS (Continued)

I

g. Each time the containment purse and exhaust isolation valves are l opened, a special test shall be performed within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> af ter valve closure or prior to entering MODE 4 from MODE 5. whichever j

is later. The special test is conducted by pressurizing the piping section including one valve inside and one valve outside the containment to a pressure greater or equal to 20 psig. The leakage l

rate per penetration shall not exceed 0.15 L,.

h. The special . test as defined in Surveillance Requirement 4.6.1.2.g <

shall be performed for the contairnent purge and isolation valves j when the plant has been in any combination of MODES 3. 4, 5 or 6 for more than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> provided that the test requiredLby Surveil- .

lance Requirement 4.6.1.2.g has not been perfornied in the previous 6 months.

i. All test leakage rates shall be calculated using observed data l converted to absolute values. Error analyses shall be performed to select a balanced integrated leakage measurement system. ,

J. The provisions of Specification 4.0.2 are not applicable.

I m i e

,.' DAVIS-BESSE. UNIT 1 1 ., , 3/16_4. _

Amendment N@._ & 1160. _ _. _ _ __ __

~

1 Docket dumber 50-346 1.icense Number NPF-3 Serial Number 1971 Attachment.

re a N.ORMA p&0(s_Y TABLE 3.6-1 DELETED l

l DAVIS-BESSL UNIT 1 3/4 6-5 Amencnent No.160

Docket Number 50 346 Liccaos Numb 3r NPF-3 54 rial Number 1971 i Attaennent Page 15 i

l::NTAINMENTSYSTEMS ,

CONTAINMENT AIR LOCKS LIMITING CONDITION FOR OPERATION 3.6.1.3 Each containment air lock shall be OPERABLE with:

8 i

a. Both doors closed except when the air lock is being used for normal transit entry and exit through the containment, then at least one air lock door shall be closed, and

b. An overall air lock leakage rate of ,< 0.002 L, at P,, 38 psig.

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

} ., -- - - -m

% TION, l .

~~ p,See. Att a d M.** a- W 10:k 40:erab!:, enter

• th 01- 100k to-OPEAASL-E 'A P #S i

-un" 2! 5 gr: er be i+.et-4e+54-40T ST*NDeY within-the-aent 5 Murd ,

iT COLO SHUTOOWN withir, tM f0110xing 30 h0 erb

~

"RVE!LLANCE REQUIREMENTS

.5.1.3 -Each containmenLair lock shall be gmontt,~ rated OPERABLE:-

s ~ ~ ~T W M -it. T ~ui;. D T+ <o-

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k *Mttfhach opening e::::t Mr th: 21" !::h i bei- ~;;d .*: r QTultip!: :_ntrR:. tyt 1-Qtm; r ?? Mer+,(by 7e'FTTying either no dbfiitit$51e seal leakage when t*e voluire1etween the

door seals is pressurized to 10 psig, or oy verifying a seal leakage rate of < 0.0015 L seals is pressurTred to P , when the volume between the door holddowns-are installed, ,,-38 psig, and the air lock door

b. MjAt least once per 6 nonths by conducting an overall air. lock f D 1 -

leakage test at P 38 psig, and by verifying that the overall Vl L

-air lock leakage fa,te is within its limit, and

c. At least once per 6 months hv verifying that only one door in

. eAch air lock can be ope'v6 i

• a time, i

a e n e,;, ". s e n u <m a , n. p u m u a . ,e n m m 7 g to per[orybef resu .e H4ri,,Y,.a Q *fles d n:e f:c %

K. pg ,,,4,

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W = x it , + . o #1 uoLF tLwe %t w du r,.; J g ;+(p.,,,,

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Docket Nueber 50-346 License Number MPF-3 Serial Number 1971 Attachment

. Page 16 Nov 3.6.1.3 Action

• • a. Vith one air lock door inoperable in one or more containment air locks, or with the containment air lock interlock mechanism inoperable in one or more containment air locks:

1. Verify an OPERABLE door in each affected air lock is closed within one hour, and

2. Lock an OPERABLE door-closed in each affected air lock vithin 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, and

3. Operation may then continue provided that an OPERABLE door in each affected air lock is maintained closed and is verified to be locked closed at least once per 31 days, and provided that the containment air lock passes each scheduled perforniance of SR 4.6.1.3b.

4. Otherwise, be in 110T STANDBY vithin the next 6 hoors and in COLD S!!UTDOVN vithin the folloving 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

• • b. Vith one or more c.-tainment air lotks inoperabic for reasons other than above:

1. Verify at least one door in each affected air lo:k is closed within one hour, and

2. Restore air lock (s) to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />,

3. U nervin.e, be in ll0T STANDBY vithin the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in i COLD SHUTDOVN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

I

Docktt Number 50-346 License Number SPF-3

@ rial Number 1971 A t t ac nmeqt. '

Face.17

[ 3/4.6 (,P]iAINMENT SYSTEMS l

BASES 3/4.6.1 PDIMRY CONTAINMENT .

3/4.6.1.1 CONTAINMENT INTEGRITY Primary CONTAINMENT INTEGRITY ensures that the release of radioactive i materials from the containment atmosphere will be restricted to those leakage paths and associated leak rates assumed in the safety analyses.

This restriction, in conjunction with the leakage rate limitationTwill 3 limit the site boundary radiation doses to within the limits of 10 CFR 100 during accident conditions. / a

& lock door ee-

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' " "'~~~ ~ y-v ee m is p -~

3/4.6.1.2 CONTAINMEN1 LEAXAGE l The. limitations on containment leakage rates ensure that the total containment leakage volume will not exceed the valt assumed in the safety analyses at the peak accident pressure of 38 psig, Pa . As an added conservatism, the measured overall integrated leakage rate is furtner limited to 1 0.75 La, during perfon.1ance of the periodic tests to account for possible degradation of the containment leakage barriers between leakage tests.

The surveillance testing for measuring leakage rates are consistent with the requirements of 10 CFR Part 50, Appenoix J with the following 2xemption. The third test of each Type A testing set need not be conducted wnen tne piant is shutcown for the 10-year plant inservice inspections.

The operational readiness of the vessel is considerec proven by the ILRT, ano in accordance with license requirements, wnen completed per the 40 t 10 months frequency.

The special test for the containment purge and exhaust isolation valves is intenced to detect gross degradation of seals on the valve seats. The special test is perfomed in addition to the Appendix J reouirements.

USAR 6.2.4 identifies all penetrations that are secondary containment bypass leakage paths.

3/4.6.1.3 CONTAINMENT AIR LOCKS The limitations on closure and leak rate for the contairnent air locks are required to meet the restrictions on CONTAINMENT INTEGRITY and containment leak rate. Surveillance testing of the air lock seals provide assurance that the overall air lock leakage will not become excessive due to seal damage during the intervals between air lock leakage tests.

IAVIS-BESSE, UNIT 1 B 3/4 6-1 Amendment No. H.H6,160