ML20203D455
| ML20203D455 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 12/31/1985 |
| From: | OMAHA PUBLIC POWER DISTRICT |
| To: | |
| Shared Package | |
| ML20203D453 | List: |
| References | |
| NUDOCS 8604220113 | |
| Download: ML20203D455 (21) | |
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Page 1 1985 REFUELING OUTAGE TYPE B AND C LOCAL LEAK RATE TEST
SUMMARY
As part of the 1985 refueling outage, local leak rate tests were performed on the reactor containment building penetrations in accordance with the Fort Calhoun Station Technical Specifications (Section 3.5) and 10 CFR 50, Appendix J.
The testing is performed to identify, measure and, if re-quired, initiate maintenance on potential reactor containment leakage paths; and to ensure the total measured leakage does not exceed the Tech-nical Specification limit of 0.6 La, (La - Leakage allowable and.6La -
62,951 standard cubic centimeters per minute). The initial "as found" local leakage which contributes toward the.6 La limit and as measured from all local leakage paths was 42,449 secm.
(The individual lead rates for each penetration are tabulated on attached TABLES I through VI).
The final "after maintenance" leak rate was 7,443 sccm.
The Type B tests were conducted by pressurizing the local containment pene-tration boundaries with air or nitrogen (air for the mechanical penetra-tions - nitrogen for the electrical penetrations) to Pa, 60 psig accident pressure, and measuring the flow rate which is required to maintain the test volume at Pa. This flow rate is assumed to be the local containment leak rate. The leak rate measurement system uses a series of calibrated rotameters to determine the leakage.
The Type B tests are conducted to measure the leakage through the contain-ment mechanical and electrical penetration seals, and containment building resilient sealed penetrations. These tests are conducted as part of the Fort Calhoun Station surveillance test program. All tests by which the fol-lowing leak rate data was cbtained, are filed at the Fort Calhoun Station as Q. A. documents.
The fuel transfer tube leak rate test (ST-CONT-2, F.4) was conducted on 10-05-85 and on 12-23-85. The measured results are tabulated on TABLE I (attached) and do contribute to the.6La leakage limit.
8604220113 860416 PDR ADOCK 05000285 R
Page 2 The equipment hatch leak rate was tested as outlined in surveillance test ST-CONT-2, F.1 (the reduced pressure test);
these daily tests are on file at the Fort Calhoun Station. The personnel air lock (PAL) was also tested four times since the previous refueling outage (once each six months per ST-CONT-2,F.2).
Leakage is tabulated in TABLE III and does contribute towards the.6La leakage limit.
The personnel air lock was leak checked on 1-24-86 per the Technical Speci-fication requirement 3.5(2). The "as found" leakage rate of 29,453 sccm was a large contributing factor in the total "as found" leakage rate of 43,449 sccm.
Using snoop, excessive leakage was detected around the packing rings.
M.0.
860008 was generated to repack the inner and outer PAL door packing rings.
On 1-29-86 the PAL door was retested and left at 1,000 sccm.
The "as found" leakage condition of the PAL doors was used during the Type "A" integrated leak rate test. The "as left" leakage of the PAL doors would decrease the actual 1985 operating cycle leak rate.
The electrical penetrations were leak tested per ST-CONT-2, F.5.
The measured results of the electrical penetrations are tabulated on TABLE IV (attached) and these do contribute to the.6La leakage limit.
The mechanical penetration sleeving was leak tested in accordance with ST-CONT-2, F.2.
M-49 and M-95 were both found to have bad test connectors.
M.0. 853426 was generated to replace fittings.
Both M-49 and M-95 were retested and found at "0" leakage. The test fitting leakage would not have affected the containment Type "A" test.
Results are tabulated on TABLE V l
(attached) and these do contribute to the.6La maximum allowable leakage limit.
Type C tests were performed to measure the leakage of containment isolation
Page 3 valves.
(Refer to surveillance tests ST-CONT-3, F.1, F.2, F.3, and F.4.)
These tests are conducted using air as the test medium; with the exception of penetrations M-9, M-12, M-16, M-91, M-93, M-94, M-95, M-96, and M-97, which use water as the test medium. Results of leak rates performed are tabulated on TABLE VI (attached).
Leak rates which do not contribute toward the.6La leakage limit are also outlined in TABLE VI.
The containment isolation valves which required significant maintenance are as follows:
M-45, M-87 and M-88.
The work completed on each of the pene-trations is described below.
M-45 (Reactor Coolant System Sample Line):
Initial leak rate measured through this penetration on 10-04-85 was found to be 3,7000 sccm. Crud under the valve seat was suspected as the leading contributor, so HCV-2504A and 2504B were cycled several times and the sample line flushed. A retest on 1-7-86 determined a leak rate of 500 sccm.
M-87 (Containment Purge Inlet):
Initial leak rate measure through this penetration on 9-26-85 was determined to be 3,100 secm.
M.0. 858161 was written to adjust seating surfaces to reduce leakage through PCV-742A and PCV-7428. M-87 was retested on 12-31-85 and a leak rate of 650 sccm determined.
M-88 (Containment Purge Inlet): The initial test on penetration M-88 was 1050 sccm.
M.0. 854115 was generated to replace the valve seat on PCV-742C and PCV-7420. The penetration was retested and a leak rate of 1350 sccm determined.
The Fort Calhoun Station Unit No. I reactor containment building was sub-jected to a fourth integrated leak rate test (Type A) during the period 10-7-85 to 10-10-85. The purpose of this test was to demonstrated the acceptability of the containment building leakage rate at a design basis accident internal pressure of 60.0 psig. Testing was performed in i
Page 4 conformance with the requirements of 10 CFR Part 50, Appendix J, and Fort Calhoun Station Unit No.1 Technical Specifications.
In addition, the rec-ommendation of ANSI 56.8-1981 and ANSI N45.4-1972 were considered, where appropriate. The results of the Type A test were forwarded to the NRC on 3-6-86 in letter LIC-86-056.
Leakage rate testing was accomplished at the pressure level of 60.0 prig for a period of 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br />. The 10 hour1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> period was followed by a 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> supplemental test for a verification of test instrumentation. The Type A integrated test results - 0.0445/ day (acceptance limit - 0.0755/ day).
l l
Page 5 TABLE I TYPE B TEST Fuel Transfer Tube Leak Rate Test - (ST-CONT-2, F.4) 2 secm As found leakage measured 10-05-85 As found leakage measure 12-PL85 2 sccm
4 Page 6 TABLE II TYPE B TEST Equipment Hatch "0" Seal Test - (ST-CONT-2, F.3)
As Found As Left 10-03 O sccm 0 sccm 12-27 O sccm 0 sccm
l Page 7 TABLE III TYPE B TEST Personnel Air Lock Leak Rate Test - (ST-CONT-2, F.2)
Date Test Leakage Measured 01-23-85 3560 sccm 06-06-85 3600 sccm 01-24-86 29,453 sccm (1.04 scfm) 01-29-86 1,000 sccm 4
i
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Page 8 TABLE IV
. TYPE B TEST Electrical Penetrations - (ST-CONT-2, F.5)
As Found (sccm)
As Left (sccm)
A-1 0
0 A-2 0
0 A-4 0
0 A-5 0
0 A-6 0
0 A-7' 0
0 A-8 0
0 A-9 0
0 A-10 0
0 A-11 0
0 B-1 0
0 B-2 0
0 B-4 0
0 B-5 0
0 B-6 0
0 B-7 0
0 B-8 0
0 B-9 0
0 B-10 0
0 B-11 0
0
i Page 9 j.
i i
TABLE IV (Continued)
TYPE B TEST Electrical Penetrations - (ST-CONT-2, F.5)
Penetration As Found (sccm)
As Left (sccm)
C-1 0
0 I
.C-2 0
0 l
C-4 0
0
-C-5 0
0 I'
C-6 0
0 1
i C-7 0
0 C-8 0
0 C 0 0
C-10 8
0 C-11 0
0 1
-D-1 0
0 i
D-2 0
0 i
i D-4 0
0 D-5 0
0 D-6 0
0 i.
D-7 0
0 1
D-8 0
0 D-9 0
0 D-10 0
0 I
D-11 0
0 l
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Page 10 TABLE IV (Continued)
' TYPE B TEST Electrical Penetrations - (ST-CONT-2, F.5)
Penetration As Found (sccm)
As left (sccm)
E-1 0
0 E-2 0
0 E-4 0
0 E-5 0
0 E-6 0
0 E-/
0 0
E-8 0
0 E-9 0
0 E-10 0
0 E-11 0
0 F-1 0
0 F-2 0
0 F-4 0
0 F-5 0
0 F-6 0
0 F-7 0
0 F-8 0
0 F-9 0
0 F-10 0
0 F-11 0
0 G-1 0
0 G-2 0
0 G-3 0
0 G-4 0
0
Page 11 TABLE IV (Continued)
TYPE B TEST Electrical Penetrations - (ST-CONT-2, F.5)
Penetration As Found (sccm)
As left (sccm)
H-1 0
0 H-2 0
0 H-3 0
0 H-4 0
0 E-HCV-383-3A 0
0 E-HCV-383-3B-1 0
E-HCV-383-4A 1
0 E-HCV-383-4B 213 0
TOTALS =
223 0
Page 12 TABLE V TYPE B TEST Mechanical Sleeve Leak Rate (ST-CONT-2, F.6)
Penetration As Found (sccm)
As Left (sccm)
M-1 0
0 M-2 0
0 M-3 0
0 M-4 0
0 M-5 0
0 M-6 0
0 M-7 0
0 M-8 0
0 M-9 0
0 M-10 0
0 M-11 0
-0 M-12 0
0 M-13 0
0 M-14 0
0 M-15 0
0 M-16 0
0 M-17 0
0 M-18 0
0 M-19 0
0 M-20 0
0 M-21 0
0 M-22 0
0
r--
Page 13 TABLE V (Continued)
TYPE B TEST Mechanical Sleeve Leak Rate (ST-CONT-2, F.6)
Penetration As Found (sccm)
As left (sccm)
M-23 0
0 M-24 0
0 M-25 0
0 M-26 0
0 M-27 0
0 M-28 0
0 M-29 0
0 M-30 0
0 M-31 0
0 M-32 0
0 M-33 0
0 M-34 0
0 M-35 0
0 M-36 0
0 M-37 0
0 M-38 0
0 M-39 0
0 M-40 0
0 M-41 0
0 M-42 0
0 M-43 0
0 M-44 0
0
Pa9e 14 TABLE V (Continued)
TYPE B TEST Mechanical Sleeve Leak Rate (ST-CONT-2, F.6)
Penetration As Found (sccm)
As left (sccm)
M-45 0
0 M-46 0
0 M-47 0
0 M-48 7
7 M-49 0
0 M-50 0
0 M-51 0
0 M-52 9
9 M-53 0
0 M-54 0
0 M-55 0
0 M-56 0
0 M-57 0
0 M-58 0
0 M-59 0
0 M-60 0
0 O
M-61 o
M-62 0
0 M-63 0
0 M-64 0
0 M-6c 0
0 M-66 0
0
Page 15 TABLE V (Continued)
TYPE B TEST Mechanical Sleeve Leak Rate (ST-CONT-2, F.6)
Penetration As Found (sccm)
As Left (sccm)
M-67 0
0 M-68 0
0 M-69 0
0 M-70 0
0 M-71 0
0 M-72 0
0 M-73 0
0 M-74 0
0 M-75 0
0 M-76 0
0 M-78 0
0 M-79 0
0 M-80 0
0 M-81 0
0 M-82 0
0 M-83 0
0 M-84 0
0 M-85 2
2 M-86 0
0 M-87 0
0 M-88 0
0
Page'16 I
i TABLE V.(Continued)
TYPE B TEST I
Mechanical Sleeve Leak Rate (ST-CONT-2, F.6)
Penetration As Found (sccm)
As left (sccm)
M-89 0
0 M-90 0
0 M-91 0
0 M-92 0
0 M-93 0
0 M-94 0
0 M-95 70 0
M-96 0
0 M-97 0
0 M-98 0
0 M-99 0
0 M-383-3 0
0
-M-383-4 900 0
TOTALS =
988 18
F Page 17 TABLE VI TYPE C TEST Piping As Left/
Penetration As Found (sccm)
After Maintenance (sccm)
M-2 0
0 M-7 0
0 M-8 0
0
- M-9 1
1
- M-10 220 220 M-11 0
0
- M-12 0
0
- M-13 23 23 M-14 5
5 M-15 19 19 M-16 23 23 M-18 0
0 M-19 0
0 M-20 0
0 M-22 0
0 M-24 0
0 M-25 2
2 M-30 0
0 M-31-1 0
0 M-31-2 0
0 M-38-1 0
0 M-38-2 0
0 M-39 11 11 M-40-1 2
2 M-40-2 0
0 M-42 0
0
- Penetration leak rates referenced to this mark do not contribute toward the.6La maximum allowable leakage.
Pags 18 TABLE VI (Continued)
TYPE C TEST Piping As left/
Penetration As Found (sccm)
After Maintenance (sccm)
M-43 0
0 M-45 3700 500 M-46-1 2
2 t
M-46-2 0
0 M-47-1 0
0 M-47-2 2
2 M-48-1 0
0 M-48-2 0
0
- M-49 0
0 M-50-1 0
0 M-50-2 9
9 M-51-1 0
0 M-51-2 13 13 M-52-1 0
0 M-52-2 330 330 M-53 0
0
-M-57-1 6
6 M-57-2 0
0 M-58-1 1
1 M-58-2 0
0
- M-63 132 132 M-69 0
0 M-72 0
0 M-73 0
0 M-74 0
0 M-79 0
0
- Penetration leak rates referenced to this mark do not contribute toward the.6La maximum allowable leakage.
~
Page 19 TABLE VI (Continued)
TYPE C TEST Piping As Left/
Penetration As Found (sccm)-
After Maintenance (sccm)
M-80 0
0 M-86 3500 3500 M-87 3100 650 M-88 1050 1350 M-89 0
0
- M-91 67 67
- M-93 10 10
- M-94 4930 4930
- M-95
.400(SCFM)
.400(SCFM)
- M-96 0
0
- M-97 30 30 HCV-383-3 0
0 HCV-383-4 0
0 TOTALS =
11,773 6,423
- Penetration leak rates referenced to this mark do not contribute toward the.6La maximum allowable leakage.
NOTE: The totals listed above only include those leakages contributing toward the.6La leakage limit.
~
Page 20 AS FOUND Fuel Transfer Tube Leak Rate Test 2 SCCM Equipment Hatch 0 SCCM PAL 29,453 SCCM Electrical Pen.
223 SCCM Mechanical Sleeve 988 SCCM Penetration 11,773 SCCM 1
TOTAL AS FOUND 42,439 SCCM-1 i
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t Page 21 AS LEFT Fuel Transfer Tube Leak Rate Test 2 SCCM Equipment Hatch 0 SCCM PAL 1,000 SCCM Electrical Pen.
O SCCM Mechanical Sleeve 18 SCCM Penetration 6,423 SCCM TOTAL AS LEFT 7,443 SCCM j