ML17321A181

Summary of Type B & C Leak Rates, for 1984

ML17321A181
Person / Time
Site:	Cook
Issue date:	12/31/1984
From:	INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
Shared Package
ML17321A180	List: ML17321A179 ML17321A181 ML17321A182
References
NUDOCS 8410290030
Download: ML17321A181 (14)

Text

REPORT OF TYPE B AND C LEAK RATES D. C. COOK PLANT UNIT 2 1984 MDTRO INNEf M NPY.

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TABLE OF CONTENTS SECTION TITLE PAGE 1.1

SUMMARY

OF RESULTS 2.0 TABLES 2.1 TABLE 1 2-3 2.2 TABLE 2 2.3 TABLE 3

1..0

SUMMARY

OF RESULTS As indicated in the accommanying ILRT report, Type A leakage test results do not indicate a failure to meet the containment overall leakage acceptance criteria. Guideline Type B&C leakages were exceeded, however, as detailed in the following.

Types B & C Leak Rate Testing (**12 THP'4030 STP.203) was performed on Unit 2 between March 12, 1984 and June 29, 1984. Table Ol shows the valves that exceeded their respective guideline leakages. Table 52 gives a brief summary of the repairs made to leaking valves. Table e3 shows a brief history of these valves as tested during previous surveillances.

While testing Zone 4 piping pentrations, several penetrations were found to be leaking. These penetrations were CPN-4, CPN-23, CPN-40, & CPN-44. CPN-4 was repaired by

,welding a hole in the bellows. CPN-23, CPN-40, & CPN-44 also had holes in the bellows but. were not repaired per AEPSC review of the plant FSAR determining that bellows on containment, penetrations are not needed to maintain the leak-tight integrity of containment. Zone 4 was tested after isolating the above penetrations.

PAGE 1

TABLE 1 Volume Guideline As Found As Left Description Valve (sccm) (sccm) (sccm)

Upper Vent.

Supply VCR-105 8 VCR-205 3600 20019 80 Air Part. Rad.

Mon. SM-1 60 623 109 Nitrogen to PRT N-159 8 N-285 45 565 40 Charging to Regen. Hx CS<<321 180 23818 744 RCDT Vent Header DCR-203 8 DCR-207 120 297 20 RCT Vent Header N-160 8 DCR-201 120 1639 258 CLVGCUV Drain Header ,.DCR-620 6 DCR-621 120 2407 RHR Recirc ICM-305 1080 5910

'E'ower Cont.

Monitor ECR-33 8 ECR-35 60 2495 1907 Air Particl Rad. Mon ECR-31 6 ECR-32 120 1300 1243 Boron Injection ICM-251 240 703 40 Boron Injection ICM-250~ 240 1854 51 CPN Coils 384 CCW CCW-243-72 60 3229 120 Glycol Return Expan. R-157 60 7947 J

Post Accident Sample Sup ECR-416 15 250 Post Accident Sample Sup ECR-417 15 299

W L

Volume Guideline As Found As Left Description Valve (sccm) (sccm) (sccm)

Control Air To Cont. XCR-102&XCR-103 120 532 532 CPN Coils 285 CCW CCW-243-'25,> 60 109 109 CPN Coils 384 CCW CCW-244-72 60 271 271 CPN Coils 285 CCW CCR-440 60 188 188 Plant Air to Cont. check Valves PA"342 120 3974 3974 Personnel Airlock Cover Flange N/A 55 121 121 Zone 4 Piping Pene. N/A 1173 19853 802

TABLE 2 During the B&C leak rate testing the following penetrations"'ere found to have excessive leak rates and required repairs:

Volume Descri tion Valve $j R~eaiea Upper Vent, Supply VCR-105&VCR-205 VCR-105: Xnspected seal & seat, found no damage VCR-205: Manufacturer replaced seal, repaired seat, replaced dowel pin Air Part. Rad. Mon. SM-1 Replaced Valve Nitrogen to PRT N-159&N-285 N-159: Lapped seat, replaced

.plug, spring, & gasket N-285: Replaced wedge & gasket Charging to Regn. Hx CS"321 Replaced disc & gasket RCDT Vent Header DCR-203&DCR-207 DCR-203: No repair necessary DCR-207: Replaced diaphragm RCDT Vent Header N-160 & DCR-201 N-160: Cleaned valve disc & seat DCR-201: No repair necessary CLV&CUV Drain Header DCR-620&CR-621 DCR-620: Cleaned seat DCR-621: Cleaned seat, replaced packing 10K Recirc. 'E'CM-305 Lapped disc.

Lower Cont. Monitor ECR-33 & ECR-35 ECR-33: Cleaned & lapped seat ECR-35: Machined seats & repacked valve Air Particle Rad. Mon ECR-31 & ECR-32 ECR-31: Iapped plug & seat, replaced gaskets ECR-32: No repairs req'uired Boron Injection ICM-251 Iapped seat Boron Injection XCM-250 Lapped Seat CPN Coils 3&4 CCW CCW-243-72 Replaced valve Glycol Return Expan. R-157 Cleaned seat Post Accident Sample .. .ECR-416 a Lapped & machined seat & plug, Sup. a replaced gasket PAGE 4

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TABLE TWO (con't.)

Volume Descri tion Valve 8 R~eeire Post Accident Sample ECR-417 Lapped seat 6 plug, Sup. replaced gasket Zone 4 Piping N/A Welded hole in bellows Penetrations of CPN-4. CPN-23, CPN-40 and CPN-44 were isolated from the containment penetration and weld channel pressurization system PAGE 5

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TABLE 3

.Guide-Valve ~

1 ine Mar84-Jun84 Nov82- an8 ar sccm found eft found e t sccm SCCm Scc sccm Scc VCR-205&

VCR-205 3600 20019 80 124 12 SM-I 60 623 109 120 120 2 40 2 40 N-159 & '0 N-285 45 565 501 501 CS-321 180 23818 744 16977 06 61 DCR-203&

DCR-207 120 297 20 50 25 N-160 &

DCR-201 16 258 I 2 I 10 I 8 120'20 DCR-620&

DCR-621 2407 12 ICM-305 1080 5910 02 02 I 0 I 0 ECR-33&

EC R-35 60 24 5 I 07 421 421 40 14 I ECR-31&

ECR-32 120 I 00 124 22 0 I I ICM-25I 240 70 4'0 6 7 ICM-250 240 I 4 CCW-243-72 60 22 120 I 6 2 R-157 60 794 0 ECR-416 15 250 ECR-417 15 XCR-102&

XCR-103 120 532 532 41 419 CCM-243-25 60 109 109 1010 0 CCW-244-72 60'71 271 170 4 4 65 1802 CCR-440 60 188 188 21325 0 PA-342 120 974 3974 N A N Airlock Cover Flan. 121 121 49.6 4 .6 N Zone 4 Pip ~

Pe etration 117 802 Page 6

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