IR 05000250/1982014
| ML20054D989 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 04/02/1982 |
| From: | Brooks E, Jape F NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML20054D985 | List: |
| References | |
| 50-250-82-14, 50-251-82-18, NUDOCS 8204230571 | |
| Download: ML20054D989 (3) | |
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NUCLEAR REGULATORY COMMISSION
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E REGION 11 o,
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101 MARIETTA ST., N.W., SUITE 3100 f
ATLANTA, GEORGIA 30303 o
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Report Nos. 50-250/92-14 and 50-251/82-18 Licensee:
Florida Power and Light Company 9250 West Flagler Street Miami, FL 33101 Facility Name: Turkey Point Unit 3 Docket Nos. 50-250 and 50-251 License No. DPR-31 and DPR-41 Inspection at Turkey Point site near Florida City, Florida b
Inspec or:
A 6:,gt Brookt
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Dhte Signed Accompanying Personne :
J. Agl s, Re ident Inspector Approved by:
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F. JTpe,~ Chief, Test P o am/5ection
[ Tate ' Signed Division of Engineeri and Technical Programs SUf41ARY Inspection on March 27-29, 1982 Areas Inspected This routine, announced inspection involved 23 inspector-hours on site in the areas of containment integrated leakage rate testing.
Resul ts Within the scope of this inspection, no violations or deviations were identified.
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E DETAILS
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1.
Persons Contacted Licensee Employees
- J. Hays, Plant Manager B. Abrishami, Plant Engineer R. Gouldy, Plant Engineer Other Organizations Stone and Webster K. Kuechler R. Parry H. Kunkel J. Busa N. Desmond R. Samson NRC Resident Inspector
- R. Vogt-Lowell J. Agles
- Attended exit interview 2.
Exit Interview The inspection scope and findings were summarized on fiarch 29, 1982, with those persons indicated in paragraph 1 above. The method and procedure for perfonning the CILRT is the same for Units 3 and 4.
Licensee Management acknowledged the inspection findings without significant comment.
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Licensee Action on Previous Inspection Findings Not inspected.
Unresolved Items Unresolved items were not identified during this inspection.
Containment Integrated Leakage Rate Tetting (CILRT)
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During the period from March p-29, the inspector witnessed performance of
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the CILTRT for Unit 3 of the.urkey Point fluclear Plant.
Containment
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pressurization was initiated of 2130 hours0.0247 days <br />0.592 hours <br />0.00352 weeks <br />8.10465e-4 months <br /> on March 27, 1982.
During containment pressurization leakage via the personnel inner airlock resulted in pressure buildup in the airlock. Pressure in the airiock was recorded at 2 psig while the containnent pressure was at 12 psig.
Entry into the i
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airlock was made in an attempt to locate and seal the leak. Leakage was
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discovered occurring through a shaft seal on the airlock inner door. Grease was injected into the seal in an attempt to stop leakage. The repair was ineffective and leakage continued. A test rig was connected to the airlock and the leakage was pennitted to flow from the airlock through the test rig in order to measure the leakabe rate, which was determined to be approxi-mately 8000 SCCit.
Contair. ment pressurization continued until 045 hours5.208333e-4 days <br />0.0125 hours <br />7.440476e-5 weeks <br />1.71225e-5 months <br /> on fiarch 28, 1982 at which time the pressure was 68.6 psia and the compressors were stopped, isolated from the containment and vented to atmosphere.
The integrated leakage rate test including a stabilization period was initiated at 0700 hours0.0081 days <br />0.194 hours <br />0.00116 weeks <br />2.6635e-4 months <br /> on march 28, 1982 and continued until 0730 hours0.00845 days <br />0.203 hours <br />0.00121 weeks <br />2.77765e-4 months <br /> on March 29,1982.
Following are the test results based on the absolute test method mass paint analysis:
Calculated leak rate 0.099315%/ day Upper 95% confidence level 0.106977%/ day
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Maximum allowable leakage rate 0.25
%/ day 75% of maximum allowable leakage rate 0.1875 %/ day
The acceptance criteria for the CILRT requires that the upper bound of the leakage rate calculated at 95% confidence level plus any required local
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leakage rate additions shall be less than 75% of maximum allowable leakabe
rate.
Subsequent to completion of the test described above the licensee agreed to conduct a local leakage rate test of the personnel airlock prior to depres-surizing the containment and to add any measured leakage to the upper 95%
confidence level. The need for this additional test occurred as a result of the attempted repair of the inner door leak, and to confirm that the outer
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door which subsequently became the containment boundary could withstand peak containment pressure with leakage also than that which would have caused the containment integrated leak rate to exceed 0.1875 %/ day. The results of the airlock leak test indicated total airlock leakage to the atmosphere to be 0.010436%/ day. By adding this leakage to the upper 95% confidence level, i.e, 0.106977 + 0.010436 equals 0.117413 and does not exceed 0.75%/ day and is therefore acceptable. The result of the CILRT including the adjustment
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