IR 05000328/1981005
| ML19341D617 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 03/04/1981 |
| From: | Burnett P, Whitener H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML19341D616 | List: |
| References | |
| 50-328-81-05, 50-328-81-5, NUDOCS 8104080018 | |
| Download: ML19341D617 (3) | |
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UNITED STATES o
NUCLEAR REGULATORY COMMISSION
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101 MARIETTA ST N.W., SUITE 3100 ATLANTA, GEORGIA 30303
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Report No. 50-328/81-05 Licensee: Tennessee Valley Authority 500A Chestnut Street Chattanooga, TN 37401 Facility Name: Sequoyah Docket No. 50-328 License No. CPPR-73 Inspection at Sequoyah Plant near Chattanooga, TN Inspector:
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H. L. #hiterfliF, Test Program Section Date Signed Engineering Ins ection Branch
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3 -f[M Approved by:
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~ PET. BurnHt, Acting Chief, Test Program Section Date Signed
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Engineering Inspection Branch SUMMARY Inspection on February 12-15, 1981 Areas Inspected i
This routine,. announced inspection involved 28 inspector-hours on site in the areas of integrated leak rate test procedure review, test witnessing and results review.
Also, an additional ten inspector-hours on site were utilized in assisting in a followup inspection of a reportable event (inadvertent operation of the containment spray in Unit 1).
Results
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l Of the three areas inspected concerning the integrated leak rate test, no items of noncompliance or deviations were identified.
The findings of the followup inspection of the reportable event are detailed in IE Report 50-327/81-07.
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DETAILS
1.
Persons Contacted Licensee Employees J. Ballentine, Plant Superintendent W. Cottle, Assistant Plant Superintendent
- K. Clark, Supervisor, Containment Test Section L. Farmer, Test Supervisor M. Cutlip, Test Director
- C. Miller, Test Director J. Denny, Test Engineer NRC Resident Inspector S. D. Butler
- Attended exit interview.
2.
Exit Interview The inspection scope and findings were summarized on February 15, 1981, with those persons indicated in Paragraph 1 above. The inspector stated that he had not identified any significant problems with either the conduct of the test or preliminary test results.
3. ' Licensee Ac' tion on'Previon's' Inspection Findings Not inspected.
4.
Unresolved Items i
Unresolved items were not identified during this inspection.
5.
Primary Containment Integrated Leak Rate Test The inspectors reviewed test activity to determine that the primary contain-ment integrated leak rate test-(ILRT) was performed.in accordance with appropriate sections of the " Containment Vessel Pre:sure and Leak Test Procedure", TVA-2A; Appendix J to 10 CFR 50; Regulatory Guide 1.68; and ANSI N45.4.
The -inspection was a coordinated effort involving the Resident Inspecto.r and a Region II specialist. Selected sampling of the licensee's activities which wer'e inspected included (1) review of TVA-2A to verify that
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the' procedure was approved andJconformed to NRC requirements; (2) observa-tion of test performance to determine that test prerequisites were com-pleted, special equipment installed, appropriate. data were recorded and analyzed; and (3). preliminary evaluation of leakage rate test results to
. verify that_ leak rate limits were met. Pertinent aspects of the. test are
. discussed in the following paragraphs.
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6.
General Observations The inspectors witnessed and/or reviewed portions of the test preparation, containment pressurization, temperature stabilization and data processing in the period of February 12-15, 1981. The following items were inspected:
I a.
The test was conducted in accordance with an approved procedure maintained at the test control center. Changes to the procedure were documented.
b.
Selected test prerequisites were verified.
c.
Plant systems required to maintain test control were in operation.
d.
Venting and draining of systems were verified, e.
Data required for performance of the containment leak rate calculations were recorded at 10-minute intervals.
f.
Problems encountered during the test were described in the test ever.t log.
g.
Valve alignments for a random selection of penetrations were verified.
No items of noncompliance or deviations were identified.
7.
Test Sequence The containment vess'el' was' press'u'rized io 27.2 PSIA'and allowed to stabalize
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for about five hours. The integrated leak rate 24-hour measurement began at 5:00 a.m. on February -15.
At about 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> into.the test the leak rate stabilizr4 in the range of 0.139 to 0.141 percent per day using a least-
. squares fit analysis of the mass data. The inspector performed an indepen-dent calculation on a data sample which yielded a leak rate of 0.138 percent per day. The inspector concluded that the measured leak rate was within the allowable leakage limit of 0.75 La equal 0.1875 percent per day.
The inspector did not witness the supplemental test but the licensee reported that agreement was about -8". which is well within the allowable 25%. These data will be reviewed when the test report is received.
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