IR 05000362/1982006
| ML20053C654 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 05/07/1982 |
| From: | Canter H, Dangelo A, Eckhardt J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | |
| Shared Package | |
| ML20053C648 | List: |
| References | |
| 50-362-82-06, 50-362-82-6, NUDOCS 8206020431 | |
| Download: ML20053C654 (5) | |
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U. S. NUCLEAR REGULATORY COMMISSION
REGION V
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Report fic. 50-362/82-6'
Docket No. 5d-3'62
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License No. CPPR-98 Safeguards Group
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Licensee:. Southern California Edison Company
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'2244 Wal~ut Grove Avenue n
Rosemead, California' 91770 Facility Name:
San Onofre Unit 3 l
Inspection at: Construction Siter San Diego County, California Inspection conducted: March 31 to April 5,1982 Inspectors: [deze/['
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__[ 7 /8 A. D' Angel, React'or gspector Dhte/ Signed f
dLOAnd A
sAAz H. Canter,feniorRpdentIngectot, Rancho Seco dat6 Signad Approvedbyh
5/7//]E H. Eckhardt, Acting Chief, Reactor Projects D(te Signed Section,1 Summary:
Inspection during the period of March 31 to Aoril 5,1982 (Report No. 50-362/82-06)
Areas Inspected: Routine, announced inspection of activities relating to preoperational Containmant Integrated Leak Rate Test (CILRT). The inspection included procedure review, interviews with personnel, witnessing portions of the Structural Integrity Test (SIT) and CILRT, and inspection of the containment.
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The inspection consisted of 63 inspector hours onsite by two NRC inspectors.
Results: There were no items of noncompliance or deviations identified.
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DETAILS 1.
Persons Contacted a.
Southern California Edison Company (SCE)
- D. Breig, Startup Unit Supervisor
- G. A. Chavey, Project Startup Manager
- K. E. O'Connor, NSSS Test Operations Supervisor
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- C. R. Horton, Startup Quality Assurance Supervisor
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- J. J. Pantaleo, Startuo Quality Assurance Engineer
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- D. B. Schone, Project Quality Assurance Supervisor
- J. Simpon, Startup Engineer
- L. Wright, Startup Engineer b.
BechtelPowerCorporation(BP".1
- L. K. Fonum, Project Startup Engineer
- H. T. Hill, Engineering Specialist
- J. T. Kelly, Senior Startup Engineer In addition, the Senior Resident Inspector, A. E. Chaffee attended.
the exit meeting of April 5, 1982.
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- Denotes those attending exit meeting of April 5,il982-.
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2.
Containment Integrated Leak Rate Test Witness
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The inspectors observed the licensee's-performance 4of-the preoperational'
Containment Integrated Leak Rate Test (CILRT)1between April 2 and "-
April 3,1982. This was performed in accordance with BN-TOP-1, Testing Criteria for Integrated Leakage Rate' Testing of-Primary _*
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Containment Structures for Nuclear Power Plants and test procedure-number 3PE-101-01, Primary Reactor Containment Leakage Rate Test'-
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The preliminary results indicated that a successful test was accomplished using the eight hour ' Total-Time" absolute method described in the referenced topical report.
In addition, " Mass Point" technique results indicated that a successful test was run after eight hours of data taking without any manipulations of containment isolation valves for repair or adjust-ments.
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The verification test, a superimposed leak rate technique, followed the short duration CILRT which met its acceptance criteria.
The licensee's preliminary results are as follows:
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Start Time - 1:30 PM on April 2,1982 End Time - 9:30 PM on April 2,1982 Maximum Allowable Leak Rate
- 0.100 w/o/ day *
Acceptance Criteria
- 0.075 w/o/ day Ma*;s Point Calculated Leak Rate
- 0.016 w/o/ day **
Total Time Calculated Leak Rate
- 0.018 w/o/ day **
Notes:
- w/o/ day weight percent per day.
- These results mus^ M Corrected for penetration test penalties prior finMitstion, 3.
bMAeccrds A r'ev,ew was made of licensee's records pertaining to calibration OY aH sensing equipinent used to conduct CILRT for compliance with FSAR (omreitments. Table 6.2-37 of the FSAR lists the accuracy and sensitivity of equipment used tg conduct the CILRT and specifies a Dew Cell system accuracy of +0.54 F, however, the actual system
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accurgcy used by the licensee, as evidenced by calibration records, is
+1.04 F.
The differqite in system accuracy dtes not appear to create a technical problem for the CILRT validity, however, the inspector requested and the licensee has committed to update the FSAR to reflect
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the actual CILRT system parameters used by the licensee.
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This will be verified during a future _ inspection (50-362/82-06/01).
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Review of Equipment Performance During the CILRT the inspector observed the initial pressurization i
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of the containment including the_ pressure hold at each plateau as
- specified in the Structural Integrity Test (SIT) procedure number 3PE-101-03 and the CILRT procedure number 3PE-101-01.
The-following observations were presented to the licensee:
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Water in Mass Flow Meter At the start of the superimposed verification leak test, residual water in the sensing line entered the in line filter c
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and could have entered the mass flow devices. These two devices are Kurz Mass Flow Meters, model number 500-9. The inspector
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requested to see a copy of the technical manual for these meters and also asked what effect the water had on the accuracy of the
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" instruments. This information was not available at the time of the exit meeting, and therefore will remain open and examined during a future inspection (50-362/82-06/02).
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Potential Comouter Program Problem BN-TOP-1 (Bechtel topical report on CILRT) uses a two-tailed statistical. test equation for generating the Student-T distribution. The Bechtel CILRT computer program should use this equation to calculate the 95% upper confidence level.
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The insnectors' review of the' computer program indicated that the ANSI /ANS 56.8-1981 equation was used. This equation is a one-tail statistical equation which will give lower results than
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the two-tailed equation referenced in BN-TOP-l. The licensee was requested to verify that BN-TOP-1 method was used for the computer program calculations. The insnector also requested a cony of the computer program listing used for this test. The licensee could not provide this information at the time of the exit meeting, and therefore this item will be examined during a future inspection (50-362/82-06/03).
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Tour of Containment Followina Depressurization An inspection was conducted of all levels in the containment-to identify if large volumes of water were present within the containment during the CILRT.
Small amounts of water were found in one containment sump; all remaining areas were dry. No pressure sources were found within containment which could affect the CILRT.
Fourteen penetrations were ' examined for artificial leakage barriers; none were found.
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Conclusions The inspectors concluded through observations, records review, and independent calculations and plotting that the testing was conducted in accordance with approved procedures; that the preliminary test results were within acceptance criteria; and that the personnel involved in test performance appeared knowledgeable and competent.
The final results of this test are due to be reported in July,1982 in accordance with Appendix J to 10 CFR 50.
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Exit Interview I
On April 5,1982, the inspectors met with the licensee representatives identified in Paragraph 1 and discussed the scope and findings of the
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inspection.
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The inspectors discussed with the licensee the general merits of short duration tests compared to twenty-four hour plus tests.
This test was run exactly as described in BN-TOP-1 and the NRC..
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approved this technique ten years ago. The data obtained from this test acted as the classical BN-TCP-1 test predicts. All instru-mentation used during this test was in accordance with BN-TOP-1 requirements. Because the data contained so little scatter and the inspectors' independent assessment and analysis disclosed no significant abnormalities, the inspectors informed the licensee that the CILRT performed for SONG 3 appeared to be in compliance with 10 CFR 50 Appendix J and BN-TOP-1.
No items of noncompliance or deviations were identified.
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