ML20214K698

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Proposed Tech Specs Re Leakage Rates & Surveillance Requirements for Containment Isolation Valves
ML20214K698
Person / Time
Site: Calvert Cliffs  Constellation icon.png
Issue date: 11/24/1986
From:
BALTIMORE GAS & ELECTRIC CO.
To:
Shared Package
ML20214K692 List:
References
NUDOCS 8612020418
Download: ML20214K698 (4)
v • d • e


Text

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CONTAINMENT SYSTEMS CONTAINMENT LEAXAGE . .

LIMITING CONDITION FOR OPERATION

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3.6.1.2 Containment leakage rates shall be limited to:--

a. An overall integrated leakage rate of:

1.

1airL,pe(346,000 r 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />sSCCM),

at P,, 500.20 percent psig, or by weight of the containment

2. <Lt (61,600 SCCM), 0.058 percent by weight of the containment air per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> at a reduced pressure of Pt . 25 psig.
b. A combined leakage rate of 1 0.60 L (207.600 SCCM), for all penetra-tions and valves subject to Type B $nd C tests when pressurized to P,.

APPLICABILITY: MODES 1, 2, 3 and 4.

. ACTION:

With either (a) the measured overall integrated containment leakage rate exceeding 0.75 L (259,500 SCCM) or 0.75 L (46,200 SCCM), as applicable, or (b) with the seasured combined leakage fate for all penetrations and valves subject to Types B and C tests exceeding 0.60 L , restore the leakage rate (s) I to within the limit (s) prior to increasing the Aeactor Coolant System I temperature above 200*F.

t SURVEILLANCE REQUIREMENTS 4.6.1.2 The containment leakage rates shall be demonstrated at the follow-l ing test schedule and shall be determined in conformance with the criteria specified in Appendix J of 10 CFR Part 50 using the methods and provisions l of ANSI N45.4 - 1972:

a. Three Type A tests (ove-all Integrated Containment Leakage Rate) shall be conducted at 40 + 10 month intervals during shutdown at either Pa (50 psig) or at Pt (25 psig) during each 10-year service period.

I 8612O20418 861124 7 DR ADOCK 0500 CALVERT CLIFFS - UNIT 1 3/4 6-2 AmendmentNo.75,SM,112

.' . o CONTAINMENT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

b. If any periodic Type A test fails to meet either .75 L (259.500SCCM)  ;

or .75 Lt (46,200 SCCM), the test schedule for subsequ8nt Type A tests i shall be reviewed and approved by the Commission. If two consecutive Type A tests fail to meet either .75 L 259,500 SCCM) or~.75 L *

(46,200 SCCM), a Type A test shall be her(formed at least every t 18 months until two consecutive Type A tests meet either .75 L (259,500 g SCCM) or .75 Lt (46,200 SCCM) at which time the above test $chedule d) 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 Type A test by verifying that the difference between supplemental and Type A test data is within 0.25 L, (86,500 SCCM) or 0.25 Lt (15,400 SCCM). h
2. Has a duration sufficient to establish accurately the change in leakage between the Type A test and the supplemental test.
3. Requires the quantity of gas injected into the containment or bled from the containment during the supplemental test to be .

' equivalent to at least 25 percent of the total measured leakage rate at P, (50 psig) or Pt (25 psig).

d. Type B and C tests shall be conducted with gas at P 50 psig) at intervals no greater than 24 months except for test $ (involving air * ,

locks.

e. Air locks shall be tested and demonstrated OPERABLE per Surveillance Requirement 4.6.1.3.
f. 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,

g. I e-r b e M 'Rc***" W 4641'I fhhg > N 9 kN CALVERT CLIFFS - UNIT 1 3/4 6-3 Amendment No. h

CONTAINMENT SYSTEMS 3/4.6.4 CONTAINMENT ISOLATION VALVES -

LIMITING CONDITION FOR OPERATION 3.6.4.1 The containment isolation valves specified in Table 3.6-1 shall be OPERABLE with isolation times as shown in Table 3.6-1.

APPLICABILITY: MODES 1, 2, 3 and 4.

ACTION:

With one or more of the isolation valve (s) specified in Table 3.6-1 inoperable, either: .

a. Restore the inoperable valve (s) to OPERABLE status within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, or .

'b . . Isolate each affected penetration within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> by use of at least one deactivated automatic valve secured in the isolation position, or

c. Isolate the affected penetration within 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />s-by use of at

. least one closed manual valve or blind flange; or

d. 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 />.

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SURVEILLANCE REQUIREMENTS 4.6.4.1;l The isolation valves specified in Table 3.6-1 shall be demon-strated OPERABLE prior to returning the valve to service after maintenance, repair or replacement work is performed on the valve or its associated actuator, control or power circuit by performance of a cycling test and verification of isolation time.

CALVERT CLIFFS - UNIT 1 3/4 6-17 A rco A.

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CCNTAINiiENT SYSTEMS -

SURVEILLANCE REOUIREMEi.TS (Continued)

4. 6. 4.1. 2 Each isolation valve specified in Table 3.6-1 shall be demonstrated OPERABLE during the COLD SHUTDOWN or REFUELING MODE at least once per 18 months by:
a. Verifying that on each containment isolation Channei A or Channel B test signal, each required isolation valve actuates to its isolation position,
b. Verifying that en each Containment Radiation-High Test Channel A or Channel B test signal, both required containment purge valves -

actuate to their isolation position,

c. Verifying that on each Saf ety Injection Actuation Channel A or -

Channel B test signal, each required isolation valve actuates to its isola tion position.

4. 6. 4.1. 3 The isolation time of each power operated or automatic valve of Table 3.6-1 shall be determined to be within its limit when tested pursuant to Technical Specification 4.0.5.

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/5.0.0.1.0- Containment purge isolation valves shall be demonstrated OPERABLE s

any time upon entering MODE 5 from power operation modes, unless the last /

l surveillance test has been performed within the past 6 months or any time after

/ being opened and prior to entering liODE 4 from shutdown modes by verifying tha

[ when the measured leakage rate is added to the leakage rates determined pursuant) to Technical Specification 4.6.1.2.d for all other Type B or C penetrations, the(

combined leakage rate is less than or equal to 0.60 La (207,600 SCCM). The leakage rate for the containment purge isolation valves shall also be compared k to the previously measured leakage rate to detect exce,ssive valve degradation. {

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?. 0. .; . i . 5 The containment purge isolation valve seals shall be replaced with new seals at a frequency to ensure co_ individual seal remains in service

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J CALhERTCLIFFS-UNIT 1 3/4 6-18 Amendment No. r/g, //M, i .

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