IR 05000416/1981063
| ML20040G909 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 01/21/1982 |
| From: | Davenport K, Jape F, Andrea Johnson, Whitener H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML20040G902 | List: |
| References | |
| 50-416-81-63, NUDOCS 8202160606 | |
| Download: ML20040G909 (5) | |
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UNITED STATES
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8" 7
"f, NUCLEAR REGULATORY COMMISSION
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E REGION ll
o, 101 MARlETTA ST., N.W SUITE 3100 o
ATLANTA. GEORGIA 30303
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Report No. 50-416/81-63 Licensee:
Mississippi Power and Light Company Jackson, MS 39205 Facility Name:
Grand Gulf Docket No. 50-416 License No. CPPR-118 Inspection at Grand Gulf site near Port Gibson, Mississippi
//2 /kl Inspectors
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H. Jotins6ri
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Dite Signed l
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H. L. Whit 6 er
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D' ate Signed e4 W/# t K. E. Divsnport Date Signed
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Appro d by:
F. J/pe, Section C6ief //
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Dite Signed Engineering InspectionMranch Engineering and Technical Inspection Division SUMMARY Inspection on December 29-31, 1981 and January 3-6, 1982 Areas Inspected
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This routine, unannounced inspection involved 82 inspector-hours on site in the
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area of primary containment integrated leak rate test (CILRT) including review of procedures, observation of test performance and examination of certain administrative controls.
Results Of the three areas inspected, no violations or deviations were identified.
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8202160606 920121
PDR ADOCK 05000416 O
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A REPORT-DETAILS -
1.
-Persons Contacted:
Licensee. Employees
- G.' B. Rogers, Site Manager
- C. R. Hutchinson, Startup Manager
- J. C~. Roberts, Startup Supervisor
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- J. W.'Yelverton, QA Supervisor
- S. F. Tanner,-QA Coordinator
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- M. A.. Lacey, QA Representative
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Other licensee employees contacted included startup engineers, technicians and operators.
NRC Inspector
- J. J. Lenahan'
- Attended exit interview 2.
Exit Interview The inspection scope and. findings were summarized on December 31, 1981, and'
January 6,1982, with those persons indicated in paragraph 1 above. The
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licensee had no. questions concerning this report period.
3.
Licensee Action on Previous Inspectio..tindings Not inspected.
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Unresolved Items Unresolved items were not identified during this inspection.
5.
Primary Containment Integrated Leak Rate Test The inspectors reviewed licensee surveillance activity to determine that the Primary Containment Integrated Leak Rate Test (CILRT) was performed in accordance with the requirements of 10 CFR 50, Appendix J; ANSI N45.4; Bechtel Topical Report BN-TOP-1; appropriate sectfens of proposed technical specification; and the CILRT test procedure.
Selected sampling of the licensee's activities which were inspected included:
(1) review of CILRT.
test procedure,1-MIO-ST-1, to verify that-the procedure was approved and conformed to regulatory requirements; (2) observation of test performance to determine that test prerequisites were completed (sample), special equipment installed and calibrated, appropriate data were recorded and analyzed; and
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(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.
a.
General Observations The inspectors witnessed and reviewed portions of the test preparation, containment pressurization, temperature stabilization, and data processing in the period December 29-31, 1981, and January 3-6, 1982.
The following items were noted:
(1) The test was conducted in accordance with an approved procedure maintained at the test control center.
(2) Test prerequisites were reviewed and found to be complete.
(3) Plant systems required to maintain test control were reviewed and found to be in service.
(4) Penetration valve alignments were observed and found to be tagged and aligned per procedure.
(5) Special test instrumentation was reviewed and found to be installed and calibrated. Instrument checks were performed prior to the test.
(6) Data required for the performance of the containment leak rate calculation were recorded at 15-minute intervals.
Data were assembled and retained for final analysis and evaluation.
(7) Problems encountered during the test were described in the test event log.
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Final analysis of the leak rate data will be performed by the licensee's consultant, Bechtel Corporation, and will be reported in the test report to the Office of Nuclear Reactor Regulation (NRR).
6.
System Alignments for Structural Integrity (SIT) Test and CILRT Test a.
Valve alignment for 12 selected systems was reviewed with operation personnel. These systems were as follows:
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Instrument air System 2.
Condensate and Refueling Water Storage and Transfer System 3.
Control Rod Drive Hydraulic System 4.
Reactor Core Isolation Cooling System
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Floor Equipment Drains System 6.
Suppression Pool Makeup and Cleanup Systems 7.
Fuel Pool Cleaning System 8.
HPCS System 9.
Low Pressure Core Spray System 10.
Residual Heat Removal System 11.
Component Cooling Water System 12.
Reactor Recirculation System During the inspection the inspectors toured inside and outside the containment and verified the proper position and tagging for a randomly selected sample of valves. No problems were idantified.
b.
Open Item 416/81-63-01 - The licensee and NRR are in the process of resolving the question of the containment overall leakage rate of 0.35's per day versus the 0.437?; per day.
The inspector observed the conflicting leak rate percentages in the FSAR, SER and proposed technical specifications and raised the question of what is the true leak rate percent. This item will be carried as an open item until final resolution.
c.
The inspector discussed the 24-hour containment integrated leak rate test (CILRT) versus the 8-hour Bechtel test as approved by Bechtel Topical Report BN-TOP-1, because of the possible deletion of the 8-hour test with the issue of the "new" Appendix
"J", which will be dependent on the NRR 1982 correlation study between the 24-hour and the 8-hour duration test.
The Office of Nuclear Reactor Regulation (NRR) will study the licensees final analysis of the leak rate data, including test duration, upon receipt of the licensee CILRT report.
d.
Inspector Followup Item - (Closed) Open Item 416/81-49-01 - The control rod drive accumulators inside containment were depressurized and vented for the CILRT test. This item is closed.
e.
Test Sequence and Results The licensee started pressurization for the ILRT at 10:30 a.m.,
January 3,1982, at 4 psi /hr.
Stabilization of the containment air mass was observed from 3:30 p.m.
to 8:30 p.m.
The integrated test measurement was officially conducted from 8:30 p.m., January 3 to 4:30 a.m., January 4, 1982 (8-hour test performed per the requirements of BN-TOP-1). A leakage of 7.67 SCFM was imposed on the containment air mass and a 5-hour verification test performe _ _ _ _ _ _ _ _ _ _ _
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Test results were calculated from data obtained at 15-minute intervals as follows:
CILRT wt. $/ day Maximum Allowable leakage (La)
0.437/0.35*
75% La 0.328/0.26*
Mass-Point Analysis Calculated Leak Rate 0.072 95% Upper Confidence Limit 0.079 Total-Time Analysis Calculated Leak Rate 0.68 95% Upper Confidence Limit 0.139
- See open item on allowable leak rate discussed in subparagraph (b)
above.
The inspector concluded that the leakage from the Grand Gulf containment is within the allowable leakage.
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