ML20067A175

Proposed Tech Spec Page 3/4 6-3 Re Surveillance Interval for Local Leak Rate Test of Containment Isolation Valve CVC-515

ML20067A175
Person / Time
Site:	Calvert Cliffs
Issue date:	01/18/1991
From:	BALTIMORE GAS & ELECTRIC CO.
To:
Shared Package
ML20067A174	List: ML20067A170 ML20067A175
References
NUDOCS 9101240280
Download: ML20067A175 (2)

Text

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ATTACHMENT 1 O

s CONTAINNIENT SYSTENTS SURVEILL ANCLREOUIRE A1EN'TS fContinued)

b. If any periodic Type A test fails to meet either .75 La (259,'s0 SCCM) or .75 Lt (46,200 SCCM), 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 either .75 La (259,500 SCCM) or .75 Lt (46,200 SCCM), a Type A test shall be performed at least every 18 months until two consecutive Type A tests meet either .75 La (259,500 SCCM) or .75 Lt (46,200 SCCM) 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 Type A test by verifying that the '

difference between supplemental and Type A test data is within 0.25 La (86,500 SCCM) or 0.25 Lt (15,400 SCCM).

2. Has a duration sufficient to establish accurately the change in leak-age between the Type A test and 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 Pa (50 psig) or P (25 psig).

d. Type B and C tests shall be conducted with gas at Pa (50 psig) at intervah no greater than 24 months except for tests involving air locks,g

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 converted to absolute values. Error analyses shall be performed to select a bal-anced integrated leakage measurement system,

s. Containment purge isolation valves shall be demonstrated OPERABLE any time upon entering MODE 5 from power operation modes, unless the last surveillance test has been perforrned within the past 6 months or any time after being opened and prior to entering MODE 4 from shutdown modes by verifying that 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 to the previ-ously measured leakage rate to detect excessive valve degradation,

h. The containment purge isolation valve seals shall be replaced with new seals at a frequency to ensure no individual seal remains in service greater than 2 consecutive fuel reload cycles.

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