IR 05000269/1987010

Insp Repts 50-269/87-10,50-270/87-10 & 50-287/87-10 on 870210-0309.No Violations or Deviations Noted.Major Areas Inspected:Areas of Operations,Surveillance,Maint,Followup of Events & Verification of ESF Lineups

ML20205N673
Person / Time
Site:	Oconee
Issue date:	03/17/1987
From:	Bryant J, Peebles T, Wert L NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
To:
Shared Package
ML20205N626	List: IR 05000269/1987010 ML20205N623
References
50-269-87-10, 50-270-87-10, 50-287-87-10, NUDOCS 8704030082
Download: ML20205N673 (8)

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N' i . n * ' 4 i UNITED STATES U ,

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, , , 3 e NUCLEAR REGULATORY COMMISSION

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. $ l 50-269/87 1.U, 50-270/87-10, and 50-287/87-10 Refoit Nos.:

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Licensee: Duke Power Ccapany

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422 South Church Street Charlotte,.3C 28242 Do:: lie"t hos.: 50-269, 50-270, License Nos.: DPR-38, DPR-47, and and 50-28 DPR-55

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Facili',y Ncme: Oconac 1, 2, and 3 Inspection Conducthd: Febrisary 10 - March 9,198'7 Inspectcrs: '

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Date Signed Approved /( 1) ~ 3//7/tT~)

s ;U A.'PeeblEC,_Section Chief -

Cate' Signed

'0ivision of Peactor Projects

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SUMMARY i Scope: This reutine, announced inspection involved resident. inspection on-site in the areas of operations . surveillance, maintenance, verification of engineered safety features ' lineups, followup of events, and shutdown work in progres Results: Of the six areas inspected, no violations or deviations were kien +.i fied.

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8704030002 870318

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REPORT DETAILS a Persons Contacted Licensee Employees M. S. Tuckman, Station Manager T. B. Owen, Maintenance Superintendent R. L. Sweigart, Operations Superintendent

• J. M. Davis, Technical Services Superintendent

• C. L. Harlin, Compliance Engineer F. E. Owens, Assistant Engineer, Compliance L. V. Wilkie, Superintendent of Integrated Schedulin Other licensee employees contacted included technicians, operators,

mechanics, security force members, and staff engineer Resident Inspectors

• J. C. Bryant

• L. D. Wert

• Attended exit intervie . Exit Interview The inspection scope and findings were summarized on March 11, 1987 with those persons indicated in paragraph 1 abov The licensee did not identify as proprietary any of the materials provided to or reviewed by the inspectors during this inspectio . Licensee Action on Previous Enforcement Matters Not inspecte . Unresolved Items No unresolved items were identified during this inspection . Plant Operations The inspectors reviewed plant operations throughout the reporting period to verify conformance with regulatory requirements, technical specifications (TS), and administrative control Control room logs, shift turnover records, and equipment removal and restoration records were reviewed routinely. Interviews were conducted with plant operations, maintenance, chemistry, health physics and performance personne ',

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Activities within the control rooms were monitored on an almost daily basi Inspections were conducted on day and on night shifts, during week days and on weekend Some inspections were made during shift change in order to evaluate shift turnover performanc Actions observed were conducted as required by Operations Management Procedure 2- The complement of licensed personnel on each shift inspected met or exceeded the requirements 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 Units 1,2, and 3 Electrical Equipment Rooms Units 1,2, and 3 Cable Spreading Rooms Station Yard Zone within the Protected Area Standby Shutdown Facility Unit 3 Containment Building During the plant tours, ongoing activities, housekeeping, security, equipment status, and radiation control practices were observe Unit 1 began the report period, February 10 to March 9,1987, at 100%

power and continued at that power until it was taken to hot shutdown on February 21 in order to replace the main stepup transforme This shutdown is discussed in paragraph 8. The reactor was again placed on line on March 6 and power increased to 88%. The unit continued in that mode the remainder of the report perio Unit 2 began the report period at 97% power limited by steam generator level, and continued at that power throughout the report perio Unit 3 began the report period in refueling shutdown and remained in that node throughout the report perio Shutdown work is discussed in paragraph No violations or deviations were identifie . Surveillance Testing The surveillance tests listed below were reviewed by the inspector to verify procedural and performance adequac 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 wor r

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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 witnessed in whole or in part:

PT/3/A/0261/07 ECCW Gravity Flow Test PT/600/12 TDEFWP Performance Test CP/2/A/2002/04D Test Procedure for Post Accident Liquid Sampling No violations or deviations were identifie . Maintenance Activities 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 trad 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 Maintenance witnessed in whole or in part:

WR 25285B 3FDW 40 Replacement of Stem Installation of New Atmospheric Dump Valves Completed work requests reviewed:

WR 01473C 3HP-216 Repair of Seat Leakage WR 52260E 2HP-20 Refurbish Limitorque Operator Wr 53519E 2HP-20 ES Test (IP/0/A/310/7A)

WR 57063D Clean Out Tube Sides of Component Cooler 3A WR 26987B 3CS-21 Repair of Seat Leakage No violations or deviations were identifie . Unit 1 Maintenance Shutdown - Transformer Replacement Unit I was taken to hot shutdown at 3:30 a.m. on February 21. The shut down was caused by an accelerated buildup of acetylene in the main step-up, three phase, transformer. The licensee had considered the transformer safe to operate until the refueling shutdown in the summer of 1987. However, the licensee's insurance carrier did not agree with this position and notified the licensee that continued operation would not be insured.

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Unit I was then shut down and the transformer replaced with a spare which will limit the reactor to approximately 88% power. Work was completed on March 5. The reactor was made critical at 8:03 p.m. on March 5 and power increased to 88%, as limited by the replacement transforme No violations or deviations were identifie . Unit 3, Removal of Loose Parts From Reactor Coolant System Problems with reactor coolant pump (RCP) 38-1, and repairs to all Unit 3 RCP's, were discussed in Report No. 50-287/86-34 and 87-04. All four pumps have been reinstalled and teste A summary report of clean up of the reactor coolant system is as follows: Lower fittings of all fuel assemblies were examined by television and all debris was removed by flushing and vacuu The plenum assembly and core barrel assembly were removed from the reactor vessel. The top lower grid, lower grid distributor plate, incore guide plate, and flow distributor were examined and cleaned by vacuum and by flushing materials out into the deep end of the cana The reactor vessel was examined and debris removed by vacuum or by long handled tool Cold leg piping from the steam generators to the reactor vessel was examined and any debris remove Hot leg piping from the reactor to the vertical piping was examined and debris remove Top and bottom heads of both steam generators were examined and any debris remove After cleaning, all areas were inspected by TV camera and documente Steam generator heads, and piping were inspected visually, where possibl A video camera was attached to vacuum hoses when cleaning the vessel. A mini rover (small, very maneuverable submarine with intense lights and a video camera) was used for inspection of water filled lines and other areas where neede Larger pieces of debris removed were as follows:

RCP-B1 pump casing: 1 pc. 3/4"X3/4"X45"; 1 pc. 3/4"X3/4"X51";

3 pc.1/8" dia. X 36".

Top of core: 1 pc. 3/4"X3/4"X5".

Top of plenum: 1 pc. 1/8"X1/4"X12".

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Vessel bottom: 1 pc. 3/4"X3/4X60"; 1 pc. 1/4" dia. X 5";

2 pc. 1/4" X 4"; 2 pc. 1/4" dia. X 6";

1 pc. 1/8" dia. X 4".

Vacutmed out 5 to 10 pc. f 2" in lengt Core support assembly lower grid: 10 to 15 pc. 1/8" dia. X 1"to 18" in lengt An estimated that 25 to 50 pounds of material were removed. The licensee does not intend to account for all material lost from the impeller, wear ring, and suction piece adapter by weight balance due to the extremely small size of most of the material. This material may be dispersed in let down filters, small drain lines, waste drain tanks and other such place Personnel exposure received in attempting to sort, identify and weigh this material would be prohibitive. It was decided to clean where possible and perform video searches to assure no loose parts remain. The licensee considers that the major portion of the reactor coolant system meets all cleanliness standards and the remainder of the system has a small probability of retaining debri No violations or deviations were identifie . Unit 3 Unusual Event - Loss of Offsite Power On March 5,1987, Unit 3 was in a refueling shutdown which began on December 17, 198 The unit was being supplied offsite power through CT-3, the startup transformer which normally supplies power during refueling shutdown. At 3:15 p.m., CT-3 locked out, resulting in a loss of offsite powe The Keowee hydro units started immediately and restored power. An Unusual Event was declared since there was a loss of offsite power, even though the unit was shut down and there was no effect on the plan Investigation indicated that the lockout was caused by mechanics cutting through the control cabinet wall just a few inches from the lockout rela The wall was being cut to install a modification and, reportedly, there was considerable vibration of the wall on which the relay was mounte At 5:50 p.m. the power source was transferred to CT-5, which is fed from an offsite power source but does not come through the switch yard and, consequently, not through CT-3. This permitted shut down of Keowee hydro and continued investigation of CT-3. AT 6:00 p.m. the Unusual Event was terminated. Upon transfer of power back to CT-3 about 8:00 p.m. an ESF actuation occurred due to power systems not being aligned for geration but for shutdown. There was no water injection since the HPI pumps were locked out, along with the LPI pumps except for the one already in operation. Keowee started again but this caused no proble No violations or deviations were identifie .

1 Inspection of Open Items The following items are being closed based on inspection and/or discussions with licensee personnel as appropriat (Closed) UNR 50-269, 270, 287/86-26-03: Design of Condenser Circulating Water System Did Not Permit Use of ECCW Syste (Closed) UNR 50-269, 270, 287/86-26-04: Surveillance Tests of ECCW System Inadequate to Detect Design Deficienc (Closed) UNR 50-269, 270, 287/86-26-05: Vacuum Line to High Point Vents Contained a Blank Flange Probably Since Plant Constructio (Closed) IFI 50-269, 270, 287/86-26-06: Licensee Corrective Actions to Ensure ECCW Operabilit The above items were discussed in Report No. 50-269, 270, 287/86-33 but were not closed at that time. Items 86-26-03 and 86-26-05 were not cited as violations since, although they are true as stated, the deficiencies occurred more than thirteen years ago. Failure to detect the deficiencies is covered in a violation in Report No. 50-269, 270, 287/86-33. Item 86-26-06 is being closed in that the inspectors have witnessed or inspected the corrective actior.s taken on the system. They also witnessed a test of Unit 3 ECCW system, using the new procedures, during the report period. The test is now run for a minimum of four hours, with and without vacuum pumps, and vacuum decay is measured. The inspectors had no further question (Closed) 270/LER 87-01: Unit 2 Trip From 19% Powe The circumstances surrounding this event were discussed in Report No. 270/87-04. The resident inspectors have completed a review of the LER and the licensee's corrective action (Closed) 287/LER 86-02: Manual Rx Trip Following a Heater Drain Pipe-Rupture Due to Pipe Thinning from Erosion. The actions surrounding this event were discussed in Report No. 50-287/86-02. Also, the corrective actions were discussed. Since that event, Duke Power Company has expanded its pipe wall measurement program considerably, and is still reviewing the program to determine if more measurements are neede (Closed) TI 251577: Survey of Licensee's Response to Selected Safety Issues. This survey was reported in Report No. 50-269, 270, 287/86-20 but was not formerly closed at that time. This item is closed.

l (Closed) TI 251580: Data Collection for the Performance Indicator l Trial Program. The information requested was forwarded in July 1986.

j This item is closed.

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(Closed). P2185-04: Faulty AK and AKR Low-Voltage Power Circuit Breakers by GE. Technicians have been trained to observe for the listed deficiencies during P.M.. on breakers. The inspectors have observed this work in progress during previous inspections.' This item is close ,