ML20080F925

Proposed Changes to Tech Specs Incorporating Changes to Meet Containment Integrated Leak Testing Requirements of 10CFR50, App J

ML20080F925
Person / Time
Site:	Point Beach
Issue date:	02/07/1984
From:	WISCONSIN ELECTRIC POWER CO.
To:
Shared Package
ML20080F887	List: ML20080F878 ML20080F925
References
TAC-52665, TAC-52666, NUDOCS 8402130187
Download: ML20080F925 (5)

Text

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be made as necessary. Description of valve closure malfunction or valve leakage that requires corrective action before the test shall be included in the Test Report.

4. Leak repairs, if required during the integrated leakage test, shall be preceded and followed by local leakage rate measurements. A description of the repaire and the ~

leakage rates measured prior to and after the repairs shall be included in the Test Report. .

5. The test duration shall not be less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> unless the criteria listed in "a" or "b" below are met.

a. For the Absolute Method, Mass Point technique, the test duration may be shortened to less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> provided the following EPRI Project 1393-5 acceptance criteria for short duration testing are met:

1) Use the absolute method, mass point technique.

2) The containment must be adequately modeled by at least one of the following conditions:

1. The containment temperature must be modeled with a minimum of 18 resistance temperature detectors (RTD's).

ii. Accurate and validated temperature weighting factors must be utilized.

iii. The average temperature change must be less than 0.5'F during the duration of the ILRT.

3) The 95 percent upper confidence level leakage rate must be zero or a positive value.

4) The calculated LSF leakage must be less than

.75 of the plant's allowable leakage rate criteria at test pressure as specified in 15.4.4.I.B.

5) The calculated 95% confidence level must be less than .75 of the plant's allowable leakage rate criteria at test pressure as specified in 15.4.4.I.B.

8402130187 840207 PDR ADOCK 05000266 15.4.4-2 i . . _ _ . _ .

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6) The calculated LSF leakage rate as a function of time shall have stabilized with a negligible positive or negative slope, as demonstrated by the following:

(L,-L,_g) x 100 10 (t,-t _g) (L c-LM Where L = Final tcst point LSF leakage rate Lg = Leakage rate for data points taken within previous hour t = Time in hours of the last data point t _g= Time in hours for the data point used for L 9_g

. L = Test leakage criteria (75% of allowable test pressure

7) The calculated 95% upper confidence level leakage rate shall be converging with the LSF Icakage rate, defined as follows:

Define: D =L 95.1 - LSF,1 Require: - Dg_7 D for all i during the last test hour

b. For the Absolute liethod, Total Time technique, the test duration may be shortened to less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> provided the following Bechtel Corporation Topical Report (BN-TOP-1) acceptance criteria for short duration testing are met:

1) For the containment atmosphere stabilization:

Once the containment is at test preseure the containment atmosphere shall be allowed to be stabilize for about four hours. The atmosphere is considered stabilized when:

15.4.4-2 ca.

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1. The rate of change of average temperature is less than 1.0*F/ hour averaged over the last two hours, or ii. The rate of change of temperature changes less than 0.5'F/ hour / hour averaged over the last two hours.

2) For the data recording and analysis, using the absolute method, Total Time technique:

1. The Trend Report based on Total Time calcu-lations shall indicate that the magnitude of the calculated leak rate is tending to stabi-lize at a value less than the maximum alllowable leak rate (L,). (Note:

The magnitude of the calculated leak rate may be increasing slightly as it tends to stabilize.

In this case, the average rate shall be deter-mined from the accumulated data over the last five hours or last twenty data points, which-ever provides the most points. Using this average rate, the calculated leak rate can then be linearly extrapolated to the 24th hour data point. If this extrapolated value of the calculated leak rate exceeds 75% of the maximum allowable leak rate (L,) then the leak rate test is continued.)

and

11. The end of test upper 95% confidence limit for the calculated leak rate based on Total Time calculations shall be less then the maximum allowable leak rate.

and iii. The mean of the measured leak rates based on Total Time calculations over the last five hours of test or last twenty data points, whichever provides the most data, shall be less than the maximum allowable leak rate.

15.4.4-2 b

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'iv . Data shall be recorded at approximately equal intervals and in no case at intervals greater than one hour.

and

v. At least twenty data points shall be pro-vided for proper statistical analysis, and vl. In no case shall the minimum test duration be less than six hours.

B. Acceptance Criteria

1. The governing criteria for acceptance of peak pressure tests is that the maximum allowable leakage (L,) shall

. not exceed 0.40 weight percent per day of containment atmosphere at 60 psig (P,) which is the design pressure.

2. The allowable in-service leakage rate (L ) at the t

reduced test pressure (P t s all not exceed L,(Ltm! am '

except if Lg ,/L,,is greater than 0.7, L tshall be equal to L,(P /P,)1/2. Where: L, is the maximum allowable leakage rate at pressure P, for the preoperational tests: the subscript a refers to values of the leakage i

measured during initial preoperational tests; and the subscripts a and t refer to tests at accident pressure and reduced test pressure, respectively.

3. The measured leakage rate (L ,) for in-service test shall not exceed 0.75 L , as determined under B-1 above.

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! 3. Local leakage shall be measured for containment isolation valves that:

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a. Provide a direct connection between the inside and outside atmospheres of the primary reactor, containment under normal operation,

b. Are required to close automatically upon receipt of a containment isolation signal.

c. Are required to operate intermittently under post-accident conditions.

i Acceptance Criterion B.

The total leakage from items II.A.5 and III.A.3 shall not exceed 0.6 L .

1 1

C. Corrective Action

1. If at any time it is determined that 0.6 L, is exceeded, repairs shall be initiated immediately. After repair, a retest to confirm conformance to the acceptance criterion of III.B is required.

i 2. If repairs are not completed and conformance to the accept-ance criterion of III.B is not demonstrated within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />, the reactor shall be taken to cold shutdown conditions until repairs are effected and the local leakage meets this acceptance criterion.

D. Test Frequency

1. The above tests of the isolation valves shall be conducted during each shutdown for major fuel reloading but in no case at intervals greater than two years.

15.4.4-6a