IR 05000255/1981026
| ML20082H098 | |
| Person / Time | |
|---|---|
| Site: | 05000000, Palisades |
| Issue date: | 12/01/1981 |
| From: | James Heller, Jackiw I, Jorgensen B, Jorgenson B, Robinsen D, Robinson D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML20082H066 | List: |
| References | |
| FOIA-83-384 50-255-81-26, NUDOCS 8312010026 | |
| Download: ML20082H098 (4) | |
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U.S. NUCLEAR REGULATORY COMMISSION
REGION III
a Report No. 50-255/81-26 Docket No. 50-255 License No. DPR-20 Licensee:
Consumers Power Company 212 West Michigan Avenue Jackson, MI 49201 Facility Name:
Palisades Nuclear Generating Plant
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Inspection At:
Palisades Site, Covert, MI Inspection Cg, ducted:
November 13 and 16-18, 1981
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Inspectors:
D L.
obinson 11 \\ 30 \\ S I
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B. L. Jorgenson
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L J. N. Heller
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Approved By:
Test, Program Section Inspection Summary
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Inspection on November 13 and 16-18, 1981 (Report No. 50-255/81-26)
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Areas Inspected: Routine, announced inspection of the containment integr-ated leak rate test. The inspection involved a total of 24 inspector-hours t
onsite by three NRC inspectors including 0 inspector-hours during off-shifts.
Results: No items of noncompliance or deviations were identified.
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8312010026 830825 PDR FOIA PDR GOGOLB3-384 5@-155
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DETAILS
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1.
Persons Contacted a
- J. J. Rang, Operations and Maintenance Superintendent
- ll. J. Palmer, Technical Superintendent
- R. E. McCaleb, QA Superintendent
- T. C. Saarela, Lead Test Engineer
- L. F. Monshor, Test Engineer
- G. F. Pratt, Test Engineer
- J. M. Knoll, Test Engineer
- J. Kutylowski, Test Engineer
- P. Gire, QA Engineer
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- R. R. Baird, ISC Technician
- C. L. Harter, I6C Technician
- Denotes those present at exit interview.
2.
Palisades Containment Integrated Leak Rate Test a.
Procedure Review
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The inspector reviewed Surveillance Procedure No. RT-36, Re-vision 6, " Containment Integrated Leak Rate Test," and verified that the procedure was technically adequate and consistent with regulatory requirements.
b.
Instrumenta' ion The inspector reviewed the calibration data associated with per-forming the CILRT.
All the instruments used in the CILRT had been calibrated as required.
The instrument calibration coefficients, RTD weighting factors, and volume weighting factors were placed into the ILRT Computer Program as required.
The following instrumentation was used in the CILRT:
Type Quantity RTD's
Flowmeter
Pressure Gauge
Dewcells
During pressurization one of the RTD's was declared inoperable.
The inspector verified that the weighing factors were properly adjusted to account for the loss of the sensor.
c.
Witness of Test The inspector witnessed portions of the CILRT on November 16-18, 1981, and noted that:
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Appropriate revisions of the procedure were in use by test personnel.
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Test prerequisites were met.
Proper plant systems were in service.
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Valve Lineups The inspector verified that the valve lineups were conducted and i
documented in accordance with the approved test procedure.
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addition, the resident inspectors verified, by direct observation, _
proper valve lineups in accessible areas.
J Blowdown and Containment Inspection c.
The resident inspectors verified that blowdown was within l
technical specification radioactivity release limits, analysis and calculations were completed before the release started, and
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i that required environmental monitoring equipment was functional before the release began.
The resident inspectors also conducted
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i an independent post CILRT containment inspection for equipment degradation after blowdown and did not identify any problems.
f.
CILRT Data Evaluation
The 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> reduced pressure CILRT was started on November 16, 1981.
The inspector independently monitored and evaluated leak rate data to verify the licensee's calculation of the leak rate.
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There was acceptable agreement between the inspector's and
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licensee's leak rate calculations as indicated in the following summary (units are in weight percent per day):
Measurement Licensee Inspector Leakage rate measured (Ltm)
0.0328 0.0319 l
during CILRT I
Ltm at 95% cor.fidence level 0.0349 0.0354 Appendix J Acceptance Criteria at 95% confidence level = 0.75 Lt
= 0.75 (.0558%/ day) - 0.0419%/ day.
As indicated above, the ad-justed Ltm at the 95% confidence level was less than the maximum allowable by 10 CFR Part 50, Appendix J.
i The above evaluation pertains to the last 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of a 39.5 hour5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> data collection period.
Containment pressurization was completed at 0654 hours0.00757 days <br />0.182 hours <br />0.00108 weeks <br />2.48847e-4 months <br /> on November 16, 1981.
At 0930 hours0.0108 days <br />0.258 hours <br />0.00154 weeks <br />3.53865e-4 months <br /> one of the four i
containment ventilation fans was lost. At 1054 hours0.0122 days <br />0.293 hours <br />0.00174 weeks <br />4.01047e-4 months <br />, exactly four
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hours after pressurization, the licensee determined that all stabil-
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ization criteria had been satisfied and started taking data for the
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Type 'A'
test. About eight and a half hours later, the licensee's
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calculated leak rate was determined to be in excess of the maximum
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allowable leak rate Lt and the test engineers considered terminat-
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ing the test, but decided to continue taking data.
By 2224 hours0.0257 days <br />0.618 hours <br />0.00368 weeks <br />8.46232e-4 months <br /> the calculated leak rate had dropped to an acceptable fevel and
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the test was continued until 2224 hours0.0257 days <br />0.618 hours <br />0.00368 weeks <br />8.46232e-4 months <br /> on November 17, 1981. The
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licensee determined that inclusion of the first 11.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> of the data into the leak rate calculation would produce an unacceptable leak rate of 0.044%/ day.
Therefore, the licensee elected to use only the last 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of data.
The inspector noted that this was acceptable provided the excessive leakage indicated during the in-itial period of the test was due to unstable containment conditions as the licensee maintained.
The licensee stated that justification for extending the stabilization period 11.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> would be incor-porated into the final CILRT report submitted to the NRC.
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Supplemental Test Data Evaluation Af ter the satisfactory completion of the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> test on November 17, 1981, a known leakage of 1.850 SCFM or 0.0517 weight percent per day was induced. The inspector independently monitored and evaluated leek rate data to verify the licensee's calculation of-the supplemental leak rate.
There was acceptable agreement between the inspector's and the licensee's leak rate calculations as indie-
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ated in the following summary (units are in weight percent per day):
Measurement Licensee Inspector Measured leakage (Lc) rate 0.083 0.083 during supplemental test Induced leakage rate (Lo) =
1.850 ccfm (0.0517%/ day)
Appendix J Acceptance Criti+ia:
Lo + Ltm - 0.25 Lt Le Lo + Ltm +
0.25 Lt.
As indicated above, the supplemental test results satis-fied the requirements of 10 CFR Part 50, Appendix J.
f No items of noncompliance or deviations were identified.
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Exit Interview The inspectors met with licensee representatives (denoted in Paragraph 1)
on November 18, 1981. The inspectors summarized the purpose, scope and findings of the inspection.
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