ML19270G852
| ML19270G852 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 04/17/1979 |
| From: | Randy Hall, Rosenberg A, Tapia J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | |
| Shared Package | |
| ML19270G849 | List: |
| References | |
| 50-285-79-06, 50-285-79-6, NUDOCS 7906210018 | |
| Download: ML19270G852 (3) | |
See also: IR 05000285/1979006
Text
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U. S. NUCLEAR REGULATORY COMMISSION
OFFICE OF INSPECTION AND ENFORCEfiEfiT
,
REGION IV
Report No. 50-285/79-06
Docket No. 50-285
License No. DPR-40
Licensee: Omaha Public Power District
1623 Harney Street
Omaha, Nebraska
68102
Facility Name:
Fort Calhoun Station - Unit 1
Inspection at:
Fort Calhoun Station, Blair, flebraska
Inspection conducted:
April 5,1979
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Inspectors:
3
J. I. Tapia; Reactor Inspector, Engineering Support
Date
Section
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f7.B.Rosenberg,ReactorInspector, Engineering
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Support Section
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)D. L. Kelley, Reactor Inspector, Reactor Operatio
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Reviewed:
Date
and fluclear Support Branch
Approved:
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R. E. Hall, Chief, Engineering Support Section
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Reactor Construction and Engineering Support Branch
Inspection Summary:
Inspection on April 5,1979 (Report flo. 50-285/79-06_)
Areas Inspected:
Routine, unannounced inspection of previously identified
inspection findings and Licensee Event Report No. 78-40 (LER 78-40).
The
inspection consisted of sixteen hours on site by two flRC inspectors.
Results:
Of the two areas inspected, no apparent item's of noncompliance
or deviations were identified.
"
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79062100le
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DETAILS
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1.
P_ersons Contacted
- R. L. Andrews, Plant Manager
M. Core, I&C Engineer
- W. G. Gates, Supervisor, Operations
G. R. Peterson, Supervisor, I&C and Electrical Field Maintenance
The IE inspectors also interviewed other licensee employees during
the inspection.
- denotes those attending the exit interview
2.
Licensee Action on Previous Inspection Findings
(Closed) Unresolved Item (.50-285/77-06) (7706-4):
Calculation of
Containment Leak Rate.
During a previous inspection, the IE inspec-
tor could not verify that the calculational technique stated in the
Reactor Containment Integrated Leak Rate Test (CILRT) report, dated
December 29, 1978, was, in fact, the one used.
During this inspection,
the IE inspectors reviewed an Omaha Public Power District letter,
dated July 20, 1977, which transmitted a revised page to the Reactor
CILRT report that specified the mass plot method as the one used in
the CILRT calculations.
The IE inspector verified, from the raw data, that the method used
for calculations was the mass plot method. The 95% confidence level
of the leakage was also verified to be below the maximum allowable
limit (0.075%/ day).
This matter is considered closed.
(Closed) Unresolved Item (.50-285/77-06) (7706-5):
Dew-Point Sensor
Calibration Correction.
During a previous inspection, the IE inspec-
tor questioned the appropriateness of using the uncalibrated dew-point
temperatures in the calculations when containment air temperatures and
pressures were calibration corrected.
Duringthisinspectfon,theIE
inspectors determined that the calibration adjustment of 1 F to the
dew-point temperatures would have little effect on the calculated
leakage of 0.025%/ day when the maximum allowable limit was 0.075%/ day.
The licensee comitted to review the application of calibration
correction for all sensors used in the next CILRT.
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3. . Review of Licensee Event Report 78-40 (LER 78-40)
.
LER 78-40, which concerned the containment purge supply and exhaust
penetration local leak rates being in excess of the Technical Speci-
fication limits during the 1978 refueling outage, was reviewed to
verify that:
reporting requirements were met; appropriate corrective
action was taken; licensee procedures were followed in the review
and evaluation of the event; and safety of continued operations was
maintained. The penetration valve's seals and packing were replaced.
The retest showed compliance with the Technical Specifications.
No items of noncompliance or deviations were identified.
4.
Exit Interview
The IE inspectors met with licensee representatives (denoted in
paragraph 1) at the conclusion of the inspection. The IE
inspectors summarized the scope and findings of the inspection.
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