IR 05000295/1981030
| ML20040D795 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 01/20/1982 |
| From: | Jackiw I, Robinson D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML20040D708 | List: |
| References | |
| 50-295-81-30, 50-304-81-28, NUDOCS 8202020261 | |
| Download: ML20040D795 (3) | |
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U.S. NUCLEAR REGULATORY COMMISSION
REGION III
Report. No. 50-295/81-30; 50-304/81-28 Docket No. 50-295; 50-304 License No. DPR-39; DPR-48 Licensee: Commonwealth Edison Company P. O. Box 767
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Chicago, IL 60690 Facility Name: Zion Nuclear Power Station, Units 1 and 2 Inspection At:
Zion, IL
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Inspection Conducted: December 28, 1981 and January 6, 1982 Inspector: D
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Approved By:
I>N j iiI, iiief b 20 ' J'L Test P gram Section.
Inspection Summary Inspection on December 28, 1981 and January 6, 1982 (Report No. 50-205/81-30; 50-304/18-28)
Areas Inspected: Routine, announced inspection of Reactor Coolant System (RCS) leak rate determination. The inspection involved a total of six inspector-hours onsite by one NRC inspector including 0 inspector-hours during offshifts.
Results: No items of noncompliance or deviations were identified.
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. DETAILS'
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Persons Contacted
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' K. Graesser, Station Superintendent
- G. Plim1,1 Administrative Assistant Superintendent T. Miosi, Technical Staff Supervisor.
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Pruett, Assistant Technical Staff-Supervisor-
- A. Ockert, Primary Group Leader
- A. Panagos, Technical Staff Engineer
- P.. Hull, Quality Assurance Staff J. Waters, NRC Resident Inspector 2.
Zion - Units 1 and 2 RCS Leak Rate Determination a.
Procedure Review
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The inspector reviewed Performance Test Procedure No. PT-21,
" Reactor Coolant System Leakage Surveillance," and' verified that" the procedure was technically adequate and. consistent with regulatory requirements. The inspector noted that the manual calculation should be based on a two to four hour period and-that the tables on the RCDT and PRT should be revised. The licensee stated that worksheet #1 and both tables would be amended.
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Surveillance Requirements Technical Specifications require that Reactor Coolant System (RCS) leakage shall be limited to 10 gpm' identified leakage and 1 gpm unidentified leakage and that a RCS water inventory balance be performed at least once per 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> during steady
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state operation when in Modes 1, 2,.3, or 4.
The inspector noted that the licensee determines RCS lcakage daily.
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c.
RCS Leak Rate Evaluation I
Four hour RCS water inventory balance were conducted on December 30, 1981 and January-13,~1982 for Units 1 and 2, respectively. The inspector independently monitored and-evaluated leak rate data to verify the licensee's calculation of the leak rate._ There was good agreement between the inspector's and licensee's leak rate calculations as indicated in the_following summary (units are in gpm):
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- Unit 1 Measurement Licensee Inspector
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Gross leak rate 0.81 0.79 Identified leak rate 0.19 0.20 Unidentified leak rate 0.62 0.59 Unit 2 Measurement Licensee Inspector Gross leak rate 0.40 0.40 Identified leak rate 0.14 0.14 Unidentified leak rate 0.26 0.26 The inspector noted that the temperature indication for the PRT was inaccurate, and resulted in a nonconservative determination of PRT inleakage. The licensee stated that until the sensor was repaired, the PRT inleakage would be manually calculated. The inspector also noted that the BA flow integrators were not working properly. The licensee stated that the problem had been traced to a faulty trans-mitter and it was to be replaced. The licensee further stated that an increased calibration frequency would be considered to deal with instrument drift over the cycle. The flow integrators are used for the manual calculation of the RCS leak rate, but do not affect the computer calculation.
No items of noncompliance or deviations were identified.
4.
Exit Interview The inspector met with licensee representatives (denoted in Paragraph 1) at the conclusion of the inspection on January 6, 1982. The inspector summarized the purpose, scope and findings of the inspection.
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