IR 05000280/1981034
| ML18139B715 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 01/06/1982 |
| From: | Brooks E, Jape F NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML18139B713 | List: |
| References | |
| 50-280-81-34, 50-281-81-34, NUDOCS 8202050322 | |
| Download: ML18139B715 (3) | |
Text
e UNITED STATES e
NUCLEAR REGULATORY COMMISSION
REGION II
101 MARIETTA ST., N.W., SUITE 3100 ATLANTA, GEORGIA 30303 Report No. 50-280/81-34 and 50-281/81-34 Licensee:
Virginia Electric and Power Company P. 0. Box 26666 Richmond, VA 23262 Facility Name:
Surry 1 and 2 Docket Nos. 50-280 and 50-281 License Nos. DPR-32 and DPR-37 Inspection at Surry s1t~ear W~lliamsburg, VA Inspector: ~~~~
E. H. Brooks Approvedby: ~£ ~
F. Jape, Section Chief;;:
Engineering and Techn~-c'al Inspection Division SUMMARY Inspection on December 10-19, 1981 Areas Inspected Date Signed *
l/f,/J>2-Da'te Signed.
This routine, unannounced inspection involved 63 inspector-hours on site in the areas of containment integrated leakage rate testin Results Within the scope of this inspection no violations or deviations were identified.
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REPORT DETAILS. Persons Contacted Licensee Employees
- J. Wilson, Plant Mana~er
- R. Saunders, Assistant Plant Manager R. Blount, Test Director Other Organizations Stone and Webster H. Kunke 1 M. O'Rourke NRC Resident Inspector
- 0. Burke
- M. Davis
- Attended exit interview
- Exit Interview The inspection scope and findings were summarized on December 23, 1981 with those persons indicated in paragraph 1 abov.
Licensee Action on Previous Inspection Findings Not inspecte.
Unreso 1 ved Items Unresolved items were not ideptified during this inspectio.
Containment Integrated Leakage Rate Testing (CILRT)
During the period from December 10-23, the inspector and resident NRC inspectors witnessed preparations for and performance of the CILRT for Unit 2 of the Surry Nuclear Plan Due to delays prior to initiation of containment pressurization, performance of the CILRT was observed by the resident inspectors while transmitting the details of the test to the Region II office.
Containment pressurization was initiated at 2350 hours0.0272 days <br />0.653 hours <br />0.00389 weeks <br />8.94175e-4 months <br /> on 12-15-81. During pressurization, 1 eakage was noted past vent * system va 1 ve MOV-VS-2008..
Pressurization was secured and va 1 ve MOV-VS-2008 was determined to be partially open as a result of personnel opening the breaker before the valve was fully shut. The valve breaker was then closed and the valve stroked to a fully closed position resulting in elimination of the leakag Pressur-ization was restarted and continued to 61.58 psia test pressure. Leakage to atmosphere at electrical penetration A-18 was discovered and several other electrical penetrations were found to be pressurized indicating leakage into the penetrations from the containmen Leakage from penetration A-18 was of sufficient magnitude such that containment maximum allowable leakage rate was exceede Efforts were made to stop the leakage such as application of an air-block applied to penetration A~18 without success. Subsequently, a loose collar bushing was found on the electrical connector on penetration A-18 and was tightened thereby reducing the leakage to an acceptable leve The integrated leak rate test was for record purposes considered a failur In accordance with Appendix J to 10CFR50 Surry Unit 2 will be subjected to addi ti ona 1 *integrated 1 eakage rate tests at each p 1 ant shutdown for refueling or approximately every 18 months whichever occurs first until two consecutive tests meet the acceptance criteri Without depressurizing the containment a new CILRT was initiate Data taking continued for approximately 16 hour1.851852e-4 days <br />0.00444 hours <br />2.645503e-5 weeks <br />6.088e-6 months <br /> Fo 11 owing are test results based on the absolute test method mass point analysis, and the test acceptance criteria:
Calculated leakage rate Upper 95% confidence level Maximum allowable leakage rate 75% of maximum allowable leakge rate 0.037%/day 0.038%/day 0.1%/day 0.075%/day The acceptance criteria for the CILRT requires that the upper bound of the 1 eakage rate calculated at 95% confidence 1 eve 1 p 1 us any required 1 oca 1 leakage rate additions shall be less than 75% of maximum allowable leakag~
rat Subsequent to the comp 1 et ion of the tests described above, the licensee agreed to repeat local leak rate tests on all electrical penetra-tions at full pressure (Pa). The total local leakage (containment penetra-tions and isolation valves) to be added to the containment calculated integrated 1 eakage rate is O. 00129%/day or 3. 87 SCF Accardi ngly, 0. 038%/day +O. 00129%/day * does not exceed O. 075%/day and is therefore acceptabl The results of the CILRT including the adjustments for local leakage rate testing will be submitted in a test report to the Commission.