ML18054A701

Proposed Tech Specs Re Airlock Leak Tests

ML18054A701
Person / Time
Site:	Palisades
Issue date:	04/20/1989
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Shared Package
ML18054A699	List: ML18054A698 ML18054A700 ML18054A701
References
NUDOCS 8904260158
Download: ML18054A701 (5)

Text

ATTACHMENT Consumers Power Company Palisades Plant Docket 50-255 PROPOSED TECHNICAL SPECIFICATIONS PAGE CHANGES April 20, 1989 4 Pages

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TSP0489-0115-NL04

4.5 e

CONTAINMENT TESTS (Contd)

(2) If any periodic integrated leak rate test fails to meet

--the acceptance- criteria,- t-he-- -test~ -sahedule -appl-iaab-le- to- - ---

subsequent integrated leak rate tests will be reviewed and approved by the Commission.

e. Report of-Test-Results Each integrated leak rate test will be the subject of a summary technical report which will include summaries of local leak detection tests and leak test of the recirculation heat removal systems.

4.5.2 Local Leak Detection-Tests

a. Test (1) Local leak rate tests shall be performed at a pressure of not less than 55 psig.

(2) Local leak rate tests for checking air lock door seals I within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> of each door opening shall be performed I at a pressure of not less than 10 psig. I (3) Acceptable methods of testing are halogen gas detection, I soap bubble, pressure decay, or equivalent.

(4) The local leak rate shall be measured for each of the I following components:

(a) Containment penetrations that employ resilient seal

- gaskets, sealant compounds, or bellows.

(b) Air lock and equipment door seals.

(c) Fuel transfer tube.

(d) Isolation valves on the testable fluid systems' lines penetrating the containment.

(e) Other containment components which require leak repair in order to meet the acceptance criterion for any integrated leak rate test.

b. Acceptance Criteria (1) The total leakage from all penetrations and isolation I valves shall not exceed 0.60 La.

(2) The leakage for_an air lock door seal test shall not I exceed 0.023 La. I

c. Corrective-Action (1) If at any time it is determined that 0.60 La is exceeded, repairs shall be initiated immediately.

4-27 t~lJ I ti ii t'/J7 '/J, Amendment No.

TSP0489-0115-NL04

4.5 CONTAINMENT TESTS (Continued) I

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-- . 5-.2--- --1ocal-1eak-Det-ect-i0n- -Tests- ~Cont-inued-)- -- -------- -I-If repairs are not completed and conformance to the acceptance criterion of 4.5.2.b(l) is not demonstrated I within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />, the Plant shall be placed in at least I hot shutdown 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_at least I 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 />. I (2) If at any time it is determined that total containment I leakage exceeds La, within one hour action shall be I initiated to bring the Plant to hot shutdown within the I next six (6) hour~ and cold shutdown within the following I thirty (30) hours. I (3) If air lock door seal leakage is greater than 0.023 La, I repairs shall be initiated immediately to restore the I door to less than specification 4.5.2.b(2). In the event I repairs cannot be completed within 7 days, the Plant I shall be brought to a hot shutdown condition within the I next six (6) hours and cold_shutdown within the I following thirty {30) hours. I If air lock door seal leakage results in one (1) door I causing total containment leakage to exceed 0.60 La, the I door shall be declared inoperable and the remaining I operable door shall be immediately locked closed and I tested within four (4) hours. As long as the remaining I door is founq to be operable, the provisions of 4.5.2.c(2) I do not apply. Repairs shall be initiated immediately to I establish conformance with specification 4.5.2.b(l). In I the event conformance to this specification cannot be I established within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> the Plant shall be brought to I a hot shutdown 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 I within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. I

d. Test Frequency (1) Individual penetrations and containment isolation valves shall be leak rate tested at a frequency of at least every six months prior to the first postoperational integrated leak rate test and at a frequency of at least every refueling thereafter, not exceeding a two-year interval, except as specified in (a) and (b) below:

(a) The containment equipment hatch and the fuel transfer tube shall be tested at each refueling shutdown or after each time used, if that be sooner:

4-28 i'-i N9S 7 Amendment No 71,

• TSP0489-0115-NL04

4.5 CONTAINMENT TESTS (Continued) I 4~5.2 Local Leak Detection-Tests (Continued) I (b) A full air lock penetr~tion test shall be performed I at six-month intervals. During the period between I the six-month tests when containment integrity is I required, a reduced pressure test for the door seals I or a full air lock penetration test shall be performed I within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> after either each air lock door I opening or the first of a series of openings. I (2) Each three months the isolation valves must be stroked to the position required to fulfill their safety function unless it is established that such operation is not practical during plant operation. The latter valves shall be full-stroked during each cold shutdown.

4.5.3 Recirculation Heat Removal-Systems

a. Test (1) The portion of the shutdown cooling system that is outside the containment shall be tested either by use in normal operation or hydrostatically tested at*

255 psig at the interval specified in 6.15.

(2) Piping from valves CV-3029 and CV-3030 to the discharge of the safety injection pumps and containment spray pumps shall be hydrostatically tested at no less than 100 psig at the interval specified in 6.15.

4-28a Amendment No. 71, TSP0489-0115-NL04

4.5 CONTAINMENT TESTS (Cont'd)

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-- -- - -- --- ---- an impor-t:-ant pa-rt-of--the- structul"a-1--integr-it-y- -of---the-containment- --- -- - - --- -- - -

is maintained.

The basis for specification of a total leakage rate of 0.60 La from penetrations and isolation valves is specified to provide assurance that the integrated leak rate would remain within the specified limits during the intervals between integrated leak rate tests. This value allows for possible deterioration in the intervals between tests.

The basis for specification of an airlock door seal leakage rate I of 0.023 La is to provide assurance that the failure of a single I airlock door will not result in the total containment leakage I exceeding 0.6 La: The seven (7) day LCO specified for exceeding I the airlock door leakage limit is acceptable since it requires I that the total containment leakage limit is not exceeded. I The limiting leakage rates from the shutdown cooling system are judgment values based primarily on assuring that the components could operate without mechani~al failure for a period on the order of 200 days after a DBA. The test pressure (270 psig) achieved either by normal system operation or* by hydrostatically testing gives an adequate margin over the highest pressure within the system after a DBA. Similarly, the hydrostatic test pressure for the return lines from the containment to the shutdown cooling system (100 psig) gives an adequate margin over the highest pressure within the lines after a DBA. ( 5 )

A shutdown cooling system leakage of 1/5 gpm will limit off-site exposures due to leakage to insignificant levels relative to those calculated for leakage directly from the containment in the DBA.

The engineered safeguards room ventilation system is equipped with isolation valves which close upon a high radiation signal from a local radiation detector. These monitors shall be set at 2.2 x 10 5 cpm, which is well below the expected level, following a loss-of-coolant accident (LOCA), even without clad failure. The 1/5 gpm leak rate is sufficiently high to permit prompt detection and to allow for reasonable leakage through the pump seals and valve packings, and yet small enough to be readily handled by the sumps and radioactive waste system. Leakage to the engineered safeguards room sumps will be returned to the containment clean water.receiver following a LOCA, via the equipment drain tank and

• pumps-. Add-itional makeup water to the containment sump inventory can be readily accommodated via the charging pumps from either the SIRW tank or the concentrated boric acid storage tanks.

4-35 Amendment No. tl, it, 10~,

TSP0489-0115-NL04