ML20082V238

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As-Found Type B & C Local Leak Rate Test Results for Unit 1 During Last Three Refueling Outages
ML20082V238
Person / Time
Site: Quad Cities Constellation icon.png
Issue date: 12/13/1983
From:
COMMONWEALTH EDISON CO.
To:
Shared Package
ML20082V184 List:
References
ID-ADMIN-6A, NUDOCS 8312200034
Download: ML20082V238 (15)
v • d • e


Text

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APPENDIX A "AS FOUND" TYPE B AND C LLRT RESULTS FOR UNIT ONE DURING THE LAST THREE REFUELING OUTAGES t

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ID/ ADMIN-6A 8312200034 831213 PDR ADOCK 05000254 P

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QUAD-CITIES UNIT ONE "AS FOUND" LOCAL LEAK RATE TEST RFC'JLTS "AS FOUND" '

WORST CASE DESCRIPTION LLRT (SCFH)

DATE LEAKAGE PATH (SCFH)

COMMENT I

1)

"A" MAIN STEAM 174.9/115.7 01-19-79 115.7 Nota 1 LINE (MSL) 4.48/169.36 09-01-80 4.48 Note 1 10.37(C) 09-06-82 5.19 Note 2 2)

"B" MAIN STEAM 285.3/130.7 01-19-79 130.7 Note 1 LINE (MSL) 23.77/27.65 09-01-80 23.77 Note 1 19.58(C) 09-06-82 9.79 Note 2 3)

"C" MAIN STEAM 631.2/81.5 01-19-79 81.5 Note 1 LINE (MSL) 1.73(C) 08-31-80 0.87 Note 2 43.78(C) 09-06-82 5.76 Note 3 4)

"D" MAIN STEAM 104.5/10.5 01-19-79 10.5 Note.1 LINE (MSL) 14.97/226.97 09-01-80 14.97 Note 1 8.06(C) 09-06-82 4.03 Note 2

5) MSL DRAIN 43.8(C) 01-18-79 5. 2'5 Note 3 5.97(C) 11-25-80 2.99 Note'2 U.D.(C) 09-07-82 5.01 Note 3,4
6) PRIMARY SAMPLE O

02-15-79 0

Note 1 0

11-24-80 0

Note 1 0

09-30-82 0

Note 1 7)

"A" FEEDWATER 2.6/17.0 02-01-79 2.6 Note 1 INLET 0.9/6.66 9/19,29/80 0.9 Note 1 U.D./194.6 10-08-82 194.6 Note 1,5

8) "B".FEEDWATER 4.4/2558.0 01-20-79 4.4 Note 1 INLET 5.39/17.76 9/4,10/14/30 5.39 Note 1 U.D./104.5 09-08-82 104.5 Note 1,5
9) RHRS TO RADWASTE O

02-07-79 0

Note 1 0

10-08-80 0

Note 1 0

12-11-82 0

Note 1

10) RHRS "A"

3.4(C) 01-23-79 1.7 Note 2 DW SPRAY 2.08(C) 09-30-80 1.04 Note 2 18.24(C) 10-10-82 9.12 Note 2

.11).RHRS "A"

0 01-23-79 0

RETURN LOOP 1.51 09-30-80 1.51 12.06 10-17-82 12.06

12) RHRS "A" TORUS 0

01-23-79 0

Note 2

13) SPRAY & COOLING 0.76(C) 09-30-80 0.38 Note 2 60.48(C) 10-24-82 4.54 Note 3 _ _ _ _ _ _ _ _ _ _ - - -

QUAD-CITIES UNIT ONE "AS FOUND" LOCAL LEAK RATE TEST RESULTS (CONTINUED)

"AS FOUND" WORST CASE DESCRIPTION LLRT (SCFH)

DATE LEAKAGE PATH (SCFH)_

COMMENT 25)

"A" TORUS VENT 14.30(C) 01-24-79 7.15 Note 2 5.69(C) 09-04-80 2.85 Note 2 10.58(C) 10-17-82 5.29 Note 2 26)

"B" TORUS VENT 147.7(C) 01-24-79 73.9 Note 2 2.51(C) 09-04-80 1.26 Note 2 0.02(C) 09-09-82 0.01 Note 2

27) DW & TORUS 2.20(C) 01-20-79 1.10 Note 2 SUPPLY PURGE AIR 1.25(C) 09-03-80 1.13 Note 2 1.90(C) 10-20-82 1.45 Ncte 2
28) DW & TORUS 45.0(C) 02-16-79 14.2 Note 3 EXHAUST PURGE AIR 9.0(C) 11-02-80 4.5 Note 2 9.0(C) 10-17-82 4.5 Note 2
29) DW FLOOR 26.0(C) 01-30-79 1.85 Note 3 DRAIN SUMP 0.65(C) 09-23-80 0.33 Note 2 1.1C(C) 10 - 2 0 - 8.'-

0.55 Note 2

30) DW EQUIPMENT 2.85(C) 02-02-79 1.43 Note 2 DRAIN SUMP 4.75(C) 09-23-80 2.38 Note 2 0.90(C) 10-20-82 0.45 Note 2
31) HPCI STEAM O(C) 01-19-79 0

SUPPLY 5.19(C) 08-31-80 2.60 Note 2 3.46(C) 09-06-82 1.73 Note 2

32) HPCI DRAIN POT 1.90 01-19-79 1.90 EXHAUST CHECK 4.50 08-31-80 4.50 0

09-09-82 0

33) HPCI STEAM 190.3 01-19-79 190.3 EXHAUST CHECK 4.02 08-31-80 4.02 U.D.

09-07-82 U.D.

Note 6,8 34)

D.W. PNEUMATIC 0.05/0.7 02-02-79 0.05 Note 1 35) 0/0 09-03-80 0

Note 1 13.0/14.0 09-27-82 13.0 Note 1 36) 0, ANALYZER 0/0 02-03-79 0

Note 1

37) SUCTION 0.2/0.6 09-09-80 0.2 Note 1 0/0.2 09-13-82 0

Note 1 QUAD-CITIES UNIT ONE "AS FOUND" LOCAL LEAK RATE TEST RESULTS (CONTINUED)

"AS FOUND" WORST CASE DESCRIPTION LLRT (SCFH)

'DATE LEAKAGE PATH (SCFH)

COMMENT

14) RHRS "B"

0.2(C) 01-26-79 0.1 Note 2 DW SPRAY 0

09-30-80 0

Note 2 1.13(C) 10-25-82 0.57 Note 2

15) RHRS "B"

0 01-25-79 0

RETURN LOOP 6.18 09-30-80 6.18 0

10-25-82 0

16) RHRS "B"

TORUS 3.6(C) 01-25-79 1.8 Note 2

17) SPRAY & COOLING 4.21(C) 09-29-80 2.11 Note 2 4.91(C) 10-24-82 2.96 Note 2
18) SHUTDOWN COOLING 3.1(C) 02-16-79 1.6 Note 2 SUCTION 0(C) 10-01-80 0

Note 2 15.58(C) 10-04-82 7.79 Note 2 l

19) READ SPRAY O(C) 01-29-79 0

Note 2 0.38(C) 10-01-80 0.19 Note 2 0.19(C) 10-24-82 0.10 Note 2 20)

C-U SUCTION O(C) 02-01-79 0

Note 2 5.75 (C) 10-31-80 2.88 Note 2 14.87(C) 09-30-82 7.44 Note 2

21) RCIC STEAM 0.17(C) 01-18-79 0.09 Note 2 SUPPLY 0.24(C) 08-31-80 0.12 Note 2 0.38(C) 09-06-82 0.19 Note 2
22) RCIC CONDENSATE 1.20 01-19-79 1.20 DRAIN 1.90 08-31-80 1.90 2.50 09-09-82 2.50
23) RCIC TURBINE O

01-27-79 0

EXHAUST 1.20 08-31-80 1.20 1584.0 09-07-82 1584.0 Note 6

24) DW & TORUS 58.3(C) 01-22-79 4.14 Note 3 PURGE 1.05(C) 11-18-80 0.53 Note 2 258.0(C) 09-09-82 0

Note 3,7 -

QUAD-CITIES UNIT ONE "AS FOUND" LOCAL LEAK RATE TEST RESULTS (CONTINUED)

"AS FOUND" WORST CASE DESCRIPTION LLRT (SCFH)

DATE LEAKAGE PATH (SCFH)

COMMENT

38) 0 ANALYZER 0.5/0 02-03-79 0

Note 1

39) SbCTION 0.2/0.3 09-09-80 0.2 Note 1 4.2/0 09-13-82 0

Note 1

40) 0 ANALYZER 0/0-02-03-79 0

Note 1

41) SbCTION 0/0 09-09-80 0

Note 1 4.2/3.9 09-13-82 3.9 Note 1 42) 0, ANALYZER 0.10/0.15 02-03-79 0.1C Note 1

43) SUCTION 0.40/1.10 09-09-80 0.40 Note 1 0.20/0.20 09-13-80 0.20 Note 1
44) 0 ANALYZER 11.5/1.50 01-30-79 1.50 Note 1
45) RbTURN 7.5/1.80 09-18-80 1.80 Note 1 8.0/2.70 09-17-82 2.70 Note 1
46) AUTO TIP 5.1 01-31-79 5.1 BALL VALVE O

09-15-80 0

4.5 09-21-82 4.5

47) AUTO TIP O

01-31-79 0

BALL VALVE 0.2 09-15-80 0.2 0.2 09-21-82 0.2

48) AUTO TIP 1.85 01-31-79 1.85 BALL VALVE O

09-15-89 0

0 09-21-82 0

49) AUTO TIP O

01-31-79 0

BALL VALVE O

09-15-80 0

1.0 09-21-82 1.0

50) AUTO TIP 0.25 01-31-79 0.25 BALL VALVE 0.10 09-15-80 0.10 0

09-21-82 0

51) TIP PURGE 2.70 01-31-79 2.70 CEECK VALVE 6.00 09-15-80 6.00 11.70 09-21-82 11.70 REPAIRED
52) CAM-DW 0

09-30-80 0

Note 2 0

09-16-82 0

Note 2 l

QUAD-CITIES UNIT ONE "AS FOUND" LOCAL LEAK RATE TEST RESULTS (CONTINUED)

"AS FOUND" WORST CASE DESCRIPTION LLRT (SCFH)

DATE LEAKAGE PATH (SCFIQ COMMENT

53) CAM-TORUS 0

09-30-80 0

Note 2 0

09-16-82 0

Note 2

54) CAM-DW 0.60 09-30-80 0.30 Note 2 0

09-16-82 0

Note 2

55) CAM-TORUS 7.0 09-30-80 3.5 Note 2 0

09-16-82 0

Note 2

56) ACAD-DW 0

09-30-80 0

Note 2 0

09-17-82 0

Note 2

57) ACAD-TORUS 0

09-30-80 0

Note 2 0

09-16-82 0

Note 2

58) ACAD-DW 0.3 09-30-80 0.15 Note 2 1.20 09-17-82 0.60 Note 2
59) ACAD-TORUS 1.20 09-30-80 0.60 Note 2 0

09-16-82 0

Note 2

60) ACAD-SBGTS 0

09-30-80 0

Note 2 0

09-15-82 0

Note 2

61) ACAD-SBGTS 1.10 09-30-80 0.55 Note 2 2.10 09-15-82 1.05 Note 2 NOTE:

"C" denotes that the "AS-FOUND LLRT result was for the " Combined" isolation valves that bound the test volume.

QUAD-CITIES UNIT ONE "AS FOUND" LOCAL LEAK RATE TEST RESULTS

.(CONTINUED)

LLRT RESULT LLRT RESULT DESCRIPTION JAN., 1979 Sept., 1983 COMMENT X-1 0.0 0.0 X-2 10.1 0.0 X-6 0.0 0.0 X-4 0.7 0.0 X-35A 0.0 0.0 X-35B 0.0 0.0 X-35C 0.0 0.0 X-35D 0.0 0.0

~X-35E 0.0 0.0 X-35F 0.0 0.0 X-35G 0.0 0.0 X-200A 0.0 0.0 X-200B 0.0 0.0 l

CORRECTIVE DW HEAD U.D.

U.D.

ACTION REQ'D.

SL-1 0.0 0.0 SL-2 0.0 1.5 SL-3 O.0 0.5 SL-4 0.0 0.0 SL-5 0.0 0.0 SL-6 0.0 0.0 SL-7 0.0 0.0 SL 0.0 5.5 X-7A 0.0 0.0 X-7B 0.65 0.70 X-7C 0.0 0.0 X-7D 0.0 0.0 X-8,

0.0 0.0 X-9A-0.0 0.0 X-9B 0.0 0.0 X-10 0.0 0.0 X-11 0.0 0.0 X-12 2.50 4.30 X-13A 0.0 0.0 X-13B 0.0 0.0 X-14 0.0 0.0 X-23 0.3 0.0 X-24 0.0 0.0 X-25 0.05 0.0 X-26 0.05 0.0 X-36 0.05 0.0 X-47 0.0 0.0 X-17

0. 0 0.0 X-16A 0.7 0.0 X-16B 0.15 5.10 _ _ _ _ _ _ - _

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QUAD-CITIES UNIT ONE "AS FOUND" LOCAL LEAK RATE TEST RESULTS (CONTINUED)

LLRT RESULT LLRT RESULT DESCRIPTION JAN., 1979 Sept., 1983 COMMENT X-100A 0.0 0.0 X-100B 0.0 0.0 X-100C 0.0 0.0 X-100D 0.0 0.0 X-100E 0.0 0.0 X-100F 0.0 0.0 X-100G 0.0 0.0 X-101A 0.0 0.0 X-101B 0.0 0.0 X-101D 0.0 0.0 X-102A 0.1$

0.0 X-103

  • 0.0 0.0 X-104B 0.0 0.0 X-104C 0.0 0.0 X-104F 0.0 0.0 X-105A 0.0 0.0 X-105B 0.0 0.0 X-105C 0.0 0.0 X-105D 0.0 0.0 X-107A 0.0 0.0 X-227A 0.0 0.0 X-227B 0.0 0.35 i

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NOTES

1) Valves were tested individually. The " worst case" leakage from containment is given by the minimum value of the leakages for the two valves in series.
2) The two valves were tested together. The LLRT result is the total leakage through both valves.

Since the volume tested is between isolation valves, the " worst case" leakage would be when both valves leak equally (i.e., one-half the LLRT result).

3) 'Only one of the two isolation valves was repaired. Therefore, the "as left" LLRT result also represents a " worst case" leakage for the unrepaired isolation valve.
4) The MSL drain valve, 1-220-1, caused the LLRT failure in 1979 and 1982. The plug in the globe type valve was replaced with an "over sized" component in 1982.
5) Corrective action required. Note that the " worst case" leakage through this flow path from the containment was not a problem in 1979 and 1980, but was unsatisfactory in 1982. For this reason, preventative maintenance should be the most important feature of the corrective action plan.
6) Corrective action required. This isolation consists of an untested stop check valve and a single, tested check valve. This LLRT of a single check valve on a steam line warrants an engineering change to increase reliability. Note that the LLRT results in 1979 and 1980 gave no warning of the impending failure in 1982.
7) The LLRT results in 1979 and 1982 required repairs to the 1-1601-55 valve. Because of multiple isolation features, this single valve failure would not have resulted in excessive containment leakage.

If failures of this valve continue, future corrective action will be required.

8) This valve was replaced in 1982 with a different valve design in an attempt to improve reliability.

e.-

APPENDIX B

SUMMARY

OF LLRT RESULTS INCLUDING A LISTING OF FLOW PATHS WITH POTENTIAL LEAKAGES IN EXCESS OF 30 SCFH AT 48 PSIG

I QUAD-CITIES UNIT ONE "AS FOUND" LLRT

SUMMARY

TOTAL FOR MAIN STEAM LINES (TESTED AT 25 PSIG)

JAN., 1979 SEPT., 1980 SEPT., 1982 WORST CASE LEAKAGE PATH (SCFH) 338.4 44.09 24.77 LISTING OF ALL TYPE B & C TESTS WITH " WORST CASE" LEAKAGE FROM CONTAINMENT GREATER THAN 30 SCFH AT 48 PSIG JAN., 1979 SEPT., 1980 SEPT., 1982 "A" MSL "B

MSL "A" FW INLET "B" MSL "B" FW INLET "C" MSL RCIC TURBINE EXHAUST "B" TORUS VENT HPCI TURBINE EXHAUST HPCI TURBINE EXHAUST DW HEAD DW HEAD ALL OTHER TYPE B & C TESTS (" WORST CASE" LEAKAGE IN SCFH)

JAN., 1979 SEPT., 1980 SEPT., 1982 TYPE B 15.40 17.45 TYPE C 62.06 64.89 105.11 "AS FOUND" VALUES NOT REQUIRED ON HATCHES OR DOUBLE-GASKETED SEALS, WHEN TYPE A TEST IS NOT PERFORMED.

T APPENDIX C CORRECTIVE ACTION PLAN FOR QUAD-CITIES UNIT ONE O

e

r CORRECTIVE ACTION PLAN BASED ON FALL, 1982 TYPE B AND C TESTING ON UNIT ONE

1) FEEDWAL.R INLET VALVES a) During the upcoming refuel outage, all four isolation valves will be dis-assembled to install additional hold down clamps on the valve seat rings.

b) During the above modification work, all pin bearing surfaces, seats, and seals will be inspected and repairs made, as necessary.

c) A preventative maintenance program on these isolation valves will be initiated.

(1) One (1) isolation valve will be overhauled in each feedwater line (with new seals, seats repaired as necessary, and all moveable parts repaired as necessary) each refueling outage regardless of LLRT result.

(2) In no case will FW inlet valves, regardless of LLRT result, go more than two complete cycles without the above repairs.

2) DRYWELL HEAD SEAL

)

a) Initiate a preventative maintenance program.

(1) Maintenance procedure written to:

(a) Prohibit re'-use of seal when drywell head is installed.

(b) Implement recommendations of NRC I.E.Bulletin 78-09, (b) Increase testing frequency.

(1) Presently, an "as found" LLRT is only performed when a Type A test is to be performed during the same refuel outage. An LLRT will be performed on the drywell head prior to its removal

("as found") every refueling outage.

(2) For cycles 8 and 9 on Unit One, the drywell head will additionally be LLRT once at approximately the midpoint in the power cycle (i.e., a test frequency of 9 months t 3 months). The duration of more-frequent testing will be extended if any failures are found during cycles 8 and 9.

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3) HPCI AND RCIC TURBINE EXHAUST CHECK VALVE NOTE: These isolations are multiple isolations in that each har a check valve and a stop-check valve. The stop-check valve is only tested in conjunction with the check in its mode as a stop valve, and not as a check valve. Because the LLRT of a single check valve causes a technical failure of the "as found" Type A test, an engineering change will be pursued.

Option A: (Preferred)

(1) Add a second check valve to each flow path.

Two check valves, individually testable, will allow an added measure of redundancy and reduce the likelihood of a flow path from the containment causing an "as found" failure of the Type A test.

Option B:

(1) Replace the existing check valve with a new valve to increase reliability.

(2) Verify improved reliability by more frequent LLRT's.

Perform LLRT during cycles 8 and 9 on a 9 months 3 months frequency.

The duration of more frequent testing will be extended if subsequent failures are found.

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APPENDIX D PROPOSED DRAFT COPY OF REQUEST FOR EXEMPTION FROM REQUIREMENT TO PERFORM TYPE A TESTS ON QUAD-CITIES UNIT ONE DURING CONSECUTIVE REFUEL OUTAGES

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