IR 05000269/1993009
| ML16148A766 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 04/12/1993 |
| From: | Binoy Desai, Harmon P, Lesser M, Poertner W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML16148A765 | List: |
| References | |
| 50-269-93-09, 50-269-93-9, 50-270-93-09, 50-270-93-9, 50-287-93-09, 50-287-93-9, NUDOCS 9304300116 | |
| Download: ML16148A766 (6) | |
Text
.UNITED STATES NUCLEAR REGULATORY COMMISSION
REGION II
101 MARIETTA STREET, ATLANTA, GEORGIA 30323 Report Nos.: 50-269/93-09, 50-270/93-09 and 50-287/93-09 Licensee:
Duke Power Company 422 South Church Street Charlotte, NC 28242-0001 Docket Nos.:
50-269, 50-270, 50-287, 72-4 License Nos.:
DPR-38, DPR-47, DPR-55, SNM-2503 Facility Name:
Oconee Nuclear Station Inspection Conducted: February 28 - March 27, 1993 Inspector:
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P. E. Harmon, Senior Resident Inspector Date Signed B. B. Desai, Resident Inspettor Date"Signed W. K, Poeriner, Resident Inspector Date'Signed Approved b :_
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hvM. S. Lesser, Section Chief Date Signed SUMMARY Scope:
This routine, resident inspection was conducted in the areas of plant operations, surveillance testing, maintenance activities, inspection of open items, and review of licensee event report Results:
No violations or deviations were identified. The Predictive Maintenance Program was reviewed and determined to be a strengt PDR ADOCK 05000269 G
REPORT DETAILS Persons Contacted Licensee Employees H. Barron, Station Manager S. Benesole, Safety Review Manager D. Coyle, Systems Engineering Manager J. Davis, Safety Assurance Manager T. Coutu, Operations Support Manager B. Dolan, Manager, Mechanical/Nuclear Engineering W. Foster, Superintendent, MechanicalMaintenance
- J. Hampton, Vice President, Oconee Site D. Hubba 'rd, Component Engineering Manager C. Little, Superintendent, Instrument 'and Electrical. (I&E)
- M. Patri -ck, Regulatory Compliance Manager B. Peele, Engineering Manager
- S. Perry, Regulatory Compliance
- G. Rothenberger, Work Control Superintendent
- R. Swe'igart, Operations Superintendent Other licensee employees contacte d included technicians, operators, mechanics, security force members, and staff engineer NRC Resident Inspectors
- Harmon W. Poertner B. Desai
- Attended exit intervie.
Plant Operations (71707)
a.
General The inspectors reviewed plant operations throughout the reporting period to verify conformance with regulatoryrequirements, Technical Specifications (TS), and administrative control Control room logs, shift turnover records,' temporary modification log and equipment removal and restoration records were reviewed routinely. Discussions were conducted with plant operations, maintenance, chemistry, health physics, instrument & electrical (I&E), and engineering personne Activities within the control rooms were monitored on an almost daily basi Inspections were conducted on day and night shifts, during weekdays and on weekends. Some inspections were made during shift change in order to evaluate shift turnover performance. Actions observed were conducted as required by the licensee's Administrative Procedure The complement of licensed personnel on each shift inspected met or exceeded the requirements
- Harmo
of TS. Operators were responsive to plant annunciator alarms and were cognizant of plant condition Plant tours were taken throughout the reporting period on a routine basi The areas toured included the following:
Turbine Building Auxiliary Building CCW Intake Structure Independent Spent Fuel Storage Facility Units 1, 2 and 3 Electrical Equipment Rooms Units 1, 2 and 3 Cable Spreading Rooms Units 1, 2 and 3 Penetration Rooms Units 1, 2 and 3 Spent Fuel Pool Rooms Station Yard Within the Protected Area Standby Shutdown Facility Keowee Hydro Station During the plant tours, ongoing activities, housekeeping, security, equipment status, and radiation control practices were observe Plant Status Units 1, 2 and 3 operated at power for the entire reporting perio Inoperable Concentrated Boric Acid Storage Tank (CBAST) Pumps On March 23, 1993, the licensee determined that the Unit 3 Concentrated Boric Acid Storage Tank (CBAST) pumps were inoperable. Technical Specification 3.2.2 requires that the CBAST and one associated boric acid pump be operable if the reactor is critica The 3A CBAST pump had been inoperable for an extended period of time due to reduced flow capabilities. The licensee declared the 3B CBAST pump inoperable when the pump locked up while attempting to transfer water to Units 1 and 2. The licensee stated that the requirements of TS 3.2.2 were satisfied since the bleed transfer pumps could be aligned to the CBAST and transfer the contents of the CBAST to the letdown storage tan The licensee recently revised technical specification 3.2.2 to remove the CBAST volume and boron concentration requirements from the TS and incorporate these requirements into the Core Operating Limits Report. During the TS revision process the licensee revised the Bases of TS 3.2.2 to state that a bleed transfer pump was the functional equivalent of a CBAST pump and that a bleed transfer pump could be manually aligned to the suction of the CBAST if required to transfer the contents of the CBAST to the letdown storage tank. The licensee also revised the Bases to require only a 7 gpm capability for the CBAST pumps and to change the injection time from approximately 13 hours1.50463e-4 days <br />0.00361 hours <br />2.149471e-5 weeks <br />4.9465e-6 months <br /> to 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. The
previous Bases explicitly defined the "associated boric acid pumps" referred to in TS 3.2.2 as either CBAST pumps or boric acid mixing tank pump The inspectors questioned the adequacy of the licensee change to the TS Bases. The revision to the TS bases appears to have modified the Technical Specification requirements. The NRC reviewed and approved the TS change to delete the volume and concentration requirements from the TS but the TS bases revision was conducted under the 50.59 program. The inspectors discussed this item with the licensee and with NRR. The NRC has not completed reviewing the 50.59 performed to modify the TS Bases for ITS 3.2.2. This item is identified as Inspector followup item N,270,287/93-09-01 pending completion of the NRC review of the 50.59 performed to modify the Bases for TS 3. No violations or deviations were identifie.
Surveillance Testing (61726)
Surveillance tests were reviewed by the inspectors to verify procedural and performance adequacy. The completed tests reviewed were examined for necessary test prerequisites, instructions, acceptance criteria, technical content, authorization to begin work, data collection, independent verification where required, handling of deficiencies noted, and review of completed work. The tests witnessed, in whole or in part, were inspected to determine that approved procedures were available, test equipment was calibrated, prerequisites were met, tests were conducted according to procedure, test results were acceptable and systems restoration was complete Surveillances reviewed and witnessed in whole or in part:
PT/0/A/620/017 Manual Synchronization Across PCB-8 After Emergency Start Within the areas reviewed, licensee activities were satisfactor No violations or deviations were identifie.
Maintenance Activities (62703)
Maintenance activities were observed and/or reviewed during the reporting period to verify that work was performed by qualified personnel and that approved procedures in.use adequately described work that was not within the skill of the trade. Activities, -procedures, and work requests were examined to verify proper authorization to begin work, provisions for fire, cleanliness, and exposure control, proper return of equipment to service, and that limiting conditions for operation were me Several maintenance activities were reviewed and witnessed in whole or in part. These included:
WR55278A Clean U2 4160V MTR Air Filters WR56460A Perform Lube PM "A" LP Boric Acid Pump The inspectors reviewed the licensee's Predictive Maintenance progra The current ratio of predictive/corrective maintenance is approximately 60/40. The program has received several industry awards and is considered a strength of the maintenance progra Within the areas reviewed, licensee activities were satisfactor No violations or deviations were identifie.
Inspection of Open Items (92701) (92702)
The following open item was reviewed using licensee reports, inspection record review, and discussions with licensee personnel, as appropriate:
(Closed) IFI 50-269,270,287/90-34-02, Long Term Resolution of RBCU Fouling This IFI was written to track the resolution of the RBCU fouling problems identified in several reports. The licensee has completed the corrective actions for this issue. The corrective actions included the formation of a task force to study the problem and implement a program for resolution. The task force conducted tests over a long period of time to identify the fouling mechanisms and schedule routine surveillances. The mechanisms of-fouling included boron plateout on the outside of the cooling coils, and silting of the small diameter cooler tubes from the inside. The task force initiated surveillance testing at intervals considered adequate to allow early recognition of deteriorating RBCU performance. The task force disbanded in September, 1992, after determining that the RBCU fouling surveillance/prevention program was effective. This item is close.
Review of Licensee Event Reports (92700)
The below listed Licensee Event Report (LER) was reviewed to determine if the information provided met NRC requirements. The determination included: adequacy of description, verification of compliance with Technical Specification and regulatory requirements, corrective actions taken, existence of potential generic problems, reporting requirements satisfied, and the relative safety significance of the even (Closed) LER 269/90-14, Equipment Malfunctions and Management Deficiency Result in Technical Specification Violations on Core Flood Tank Level
5 Exit Interview The inspection scope and findings were summarized on April 1, 1993, with those persons indicated in paragraph 1 above. The inspectors described the areas inspected and discussed in detail the inspection finding The licensee did not identify as proprietary any of the material provided to or reviewed by the inspectors during this inspectio Item Number Description/Reference Paragraph IFI 50-269,270,287/93-09-01 TS 3.2.2 Bases Revision (paragraph 2.c).