ML20127A289

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Containment Leak Rate Testing Investigations, Progress Summary for Sept 1982
ML20127A289
Person / Time
Site: Millstone, Calvert Cliffs, Dresden, Browns Ferry, Palisades, Indian Point, Kewaunee, Saint Lucie, Grand Gulf, Cooper, Sequoyah, Arkansas Nuclear, Prairie Island, Brunswick, Surry, Cook, Fort Calhoun, McGuire, 05000000
Issue date: 10/05/1982
From: Naus D
OAK RIDGE NATIONAL LABORATORY
To: Arndt G
Office of Nuclear Reactor Regulation
Shared Package
ML20126E434 List:
References
CON-FIN-B-0489, CON-FIN-B-489, FOIA-85-143 NUDOCS 8210120209
Download: ML20127A289 (3)
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i OAK RIDGE NATIONAL LABORATORY OPERATED SY UNION CARBIDE CORPORATION NUCLEAR DIVISION O

POST OFFICE box Y OAK RIDGE TENNE 5SEE 37830 October 5, 1982 Mr. Gunter Arndt Mechanical / Structural Engineering Branch Division of Engineering Technology NL 238 Office of Nuc ar Regulatory Research U.S. Nuclear Regulatory Commission Washington, DC 20555

Dear Gunter:

This letter summarizes our progress on the Containment Leak Rate Testing Investigations (Fin. B0489) program for the month of September 1982.

Technical Hinblichts After discussions with the NRC technical monitor, a revised list of leak rate test reports to be reviewed has been assembled. The listing, which represents 27 containments, is attached. Also contained in the listing is the type of data contained in each of the reports. The letters "A," "B" and "C" in the report column designate that~ the test was either Type A, Type B or Type C. Designations "2nd" and " SUPPL" in this column indicate that the report contains information for either a secondary containment test, or supplementary information or corrections to previously published test results, respectively.

Of the 65 documents reviewed, there is data from 49 Type A tests, 46 Type B and Type C tests. 5 secondary containment test reports, and 7 supplementary test reports. Of the 49 Type A tests, 4 were conducted using the reference vessel test method, 43 used the absolute test method, and 2 used both. (One of the reference vessel test.3 was as late as 1980, though it was conducted in conjunction with an absolute test method for comparison.) The leak rates were determined using the total time method approximately 80% of the time, with the point to point method being used 35% of the time and the mass plot techniuge being used 48% of the time. These (and subsequent) percentages do not total 100% due to the practice of using more than one data analysis fhlh YO 10 h [ O O O ($

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Mr. Gunter Arndt 2 October 5, 1982 technique for each set of data. Full pressure tests are represented 44 times, and reduced pressure tests are represented 21 times. Of the 21 reduced pressure tests,16 were conducted along with the full pressure tests in order to determine the correlation between the two types of tests. Therefore, reduced pressure tests were used only five times to determine the leak rate. Several utilities were unable to determine a reasonable correlation between the two tests and consequently used full pressure tests. Regarding test duration, 73% of the tests lasted 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or longer, 15% lasted between 12 and 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, and 12%

were completed in under 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

The test data included in the reports are being input into a computer program and analyzed by the three data analysis techniques to allow a comparison of the techniques. The results along with the input data, are plotted to determine any trends in the data and to view the sensitivity of the data measurements.

Arrangements are being made to visit three plant sites to observe integrated leak rate tests and to interview personnel. Tentative plans are to visit St. Luci in October, Sequoy'sh in November, and Browns Ferry in December.

Close contact is being maintained with the NRC Regional Office in Atlanta so as to keep abreast of the changes in scheduled test dates.

Expenditures Expenditures under this program are shown below.

May June July Aug Sept. j Expenditure ($K) 0.1 2.8 0 0.1 4.0*

Cumulative ($K) 0.1 2.9 2.9 3.0 7.0

  • Estimated g Sincerely,

.r OW D. J. Waus DJN:ege

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CONT 21HMENT LEAK RATE TEST REPORTS 2 DOCKET CONTAINNENT NUMBER DATE REPORT 50010 DSESDEN UNIT 1 241 3/19/74 A 50237 DRESDEN UNIT 2 115 12/9/70 ABC 139 t/25/71 2ND 173 5/2S/71 2ND 1092 8/16/76 ABC 50245 MILLSTONE UNIT 1 . 212 4/27/73 2ND i 232 6/12/73 ABC l 934 11/76 A8C 50247 INDIAN PO!HT UNIT 2 811 . 12/1/76 A 8002050528 1/29/80 ABC 50249 DRESDEN UNIT 3 59 2/11/71 ABC 491 9/3/74 ABC 50255 PALISADES 327 7/16/74 ABC 50259 BROWHS FERRY UNIT 1 l'02 8/13/73 ABC i 928 9/15/76 ABC 1100 12/13/77 2HO 110% 7/25/77 $UPPL l 50200 SURRY UNIT 1 517 t/15/76 4BC 623 7/1/76 $UPPL 8111040104 6/01 ABC l

50281 SURRY UNIT 2 126 7/3/73 A l

' 8009170321 $/16/90 ABC 8203240369 12/81 A8C 50282 PRAIRIE ISLAND UNIT 1 166 10h4/73 ABC 249 6/6/74 $UPPL 749 5/15/77 ABC 8101050262 12/22/80 ABC

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50285 FORT CALHOUH UNIT 1 105 6/73 SUPPL 733 75 8C

( 734 12/9/76 A 952 2/16/78 8C .

! 50286 INDIAN P01HT UNIT 3 241 3/19/75 4 252 5/12/75 $UPPL 7811C30111 6/19/78 A l 50298 COOPER 134 3/4/74 A 767 2/10/77 A8C 0009190478 5/23/80 A8C 50305 KEWAUNEE*

  • T 8/24/73 ABC 100 4/10/74 2ND 427 5/20/76 8C l' 633 6/29/77 ABC

. T 8/10/78 BC 50306 PRAIRIE ISLAND UNIT 2 232 ti31/75 ABC T 12/77 ABC 50313 ARK'HSAS A UNIT 1 147 3/8/74 ABC i 176 5/10/74 $UPPL j

50315 D. C. COOK UNIT 1 7 2/26/75 ABC 7811210260 11/14/78 ABC 50316 D. C. COOK UNIT 2 T 6/26/78 ABC 8109150432 $/10/81 A8C 50317 CALVERT CLIFFS UNIT 1 169 3/8/74 ABC 222 6/27/74 SUPPL T 4/24/78 ABC 50324 BRUNSWICK UHtt 2 T 12/10/74 A8C 1268 3/15/78 A8C 50323 BRUNSWICK UNIT 1 505 11/29/76 ABC 8111040306 10/29/81 ABC 50329 SEQUOYAH UNIT 2 8105270060 5/19/81 ABC l

I 50335 ST. LUCIE 216 10/20/75 ABC

. 7908100466 8/7/79 ABC

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50336 MILLSTONE UNIT 2 237 7/16/75 ABC 7908200369 8/10/79 ABC 50368 ARKANSAS UNIT 2 551 12/15/77 ABC 50369 MCCU1RE UNIT t 8001090377 1/3/80 ABC 50416 CRAND CULF 8204160572 4/14/82 ABC o

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