IR 05000282/1989022
| ML20246N590 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 08/31/1989 |
| From: | Gardner R, Neisler J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML20246N584 | List: |
| References | |
| 50-282-89-22, 50-306-89-22, GL-85-06, GL-85-6, NUDOCS 8909080161 | |
| Download: ML20246N590 (4) | |
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U.S. NUCLEAR REGULATORY COMMISSION
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REGION III
Reports No. 50-282/89022(DRS); 50-306/89022(DRS)
Docket Hos.
50-282; 50-306 Licenses No. DPR-42; DPR-60 Licensee: Northern States Power Company 414 Nicollet Mall Minneapolis, MN 55401 Facility Name: Prairie Island Nuclear Generating Station, Units 1 and 2 Inspection At: Prairie Island Site, Welch, Minnesota 55089 (Red Wing)
Inspection Conducted: August 14-18, 1989 kM-
3 f3fl8I Inspector:
John H. Neisler Date
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Approved By: Ronald N. Gardner, Chief 2,
g Plant Systems Section Date Inspection Summary Inspection on August 14-18, 1989 (Reports No. 50-282/89022(DRS);
No. 50-306/89022(DRS))
Areas Inspected: Routine announced inspection of the licensee's TiEplementation of the ATWS Rule (10 CFR 50.62), including the design, installation and testing of the ATWS mitigation actuation system (25020).
Results:
No violations or deviations were identified. Based on this inspection, the inspector determined that the licensee has adequately implemented the requirements of 10 CFR 50.62 and Generic Letter 85-06. Their performance in the engineering, construction, maintenance, and training areas was excellent.
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DETAILS 1.
Persons Centacted Principal Licensee Contacts
- E. Watzl, Plant Manager
- K. Beadell, Superhtendent, Technical Engineering
- J. Reuther, Lead Production Engineer
- A. Hunstad, Si.aff Engineer
- D. Mendela, General Superintendent, Engineering
- C, Propst, Quality Specialist
- G. Eckholt, Nuclear Support Services W. Leno, Project Manager, SB0 Modification J. Bystrzycki, SB0 Modification QA/QC L. Konkler, Construction Electrical Superintendent Other Persons Contacted J. Hard, NRC Senior Resident Inspector
- T. O'Connor, NRC Resident Inspec+or W. Lindlay, Commonwealth Electric,
- Designates those persons attending the exit interview.
2.
The inspector reviewed the licensee's installation of the ATWS Mitigation System Actuation Circuitry (AMSAC). The AMSAC installation has been completed in Unit 2 and is scheduled to be installed in Unit 1 during the next refueling outage.
The Prairie Island AMSAC design trips the turbine and starts the auxiliary feedwater pumps upon loss of feedwater flow or high turbine impulse chamber pressure.
The inspector verified that the AMSAC conforms to the licensee's design as endorsed by the NRR Safety Evaluation Report (SER) and that l
issues identified in the SER have been addressed. Review of design and installation drawings and a walkdown of the installed AMSAC confirmed that the safety features of existing safety-related protection systems are not compromised.
The inspector's review of procurement document packages and receipt inspection reports verified that procurement was consistent with technical requirements and that inspection, identification and storage controls were properly applied.
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The inspector determined that the latest installation specifications and l'
drawings were used and that equipment configuration and identification i
were maintained as specified. The inspector's walkdown of the AMSAC installation provided verification that the equipment was installed at the proper locations and that supports were installed according to drawings.
No indications were observed that indicated that adjacent equipment was not properly protected during installation.
By observation and document review, the inspector verified that housekeeping, radiological and fire protection controls were observed by the installers.. By visual inspection of AMSAC equipment and cables, the inspector determined that the installation met the separation criteria described in the Updated Final Safety Analysis Report for Prairie Island.
The inspector verified by review of appropriate quality control inspection reports that the required inspections and surveillance were performed during insta" ation and preoperational testing of the AMSAC. The nonconforman es identified are being tracked and corrective action is being developed by the licensee and the AMSAC vendor, Westinghouse.
The inspector's review of the AMSAC design, installation and preoperational testing confirmed that the system conformed with the requirements of the SER and that the system performed as required.
Operating procedures for Unit 2 have been revised to reflect the AMSAC modification requirements. Training for operations and maintenance personnel was provided by Westinghouse. The inspector reviewed the 28 day training course for the instrument and control maintenance technicians whose assigned duties include AMSAC maintenance and troubleshooting.
Surveillance and maintenance programs and routine testing requirements are being developed utilizing the recommendations of the AMSAC vendor, Westinghouse.
The inspector verified that there are permanently installed means for bypassing the AMSAC during maintenance and testing and that there is continuous indication of system status on the control room annunicator.
The AMSAC, once the mitigative action is initiated, goes to completion and subsequent return to normal operation requires deliberate action to reset by instrument and control section technicians. Manual initiation can be accomplished from the control room by turbine trip and auxiliary feedwater pump actuation.
The licensee's quality assurance activities for the ATWS program met the requirements of Generic Letter 85-06. Observations and discussions with personnel involved in the ATWS program confirmed their knowledge and capability of implementing the ATWS program.
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Generic Letter 85-06 and TI 2500/20 are considered to be closed at l
Prairie Island.
3.
Station Blackout Modification The inspector discussed the scope and schedule for the diesel generator building and installation of two diesel generators to satisfy station blackout requirements with the licensee's engineering and construction group. The modification requires the relocation of condensate storage tanks 21 and E2 before work begins on the new diesel generator building.
Condensate storage relocation is scheduled for the fall of 1989 with building construction scheduled to begin in the spring of 1990 and the modification completed in early 1992.
4.
Exit Interview The inspector met with licensee representatives listed in Paragraph 1 and summarized the scope and findings of the inspection. The inspector also discussed the likely informational content of the inspection report with regard to documents or processes reviewed by the inspector during the inspection. The licensee did not identify any such documents or processes as proprietary.
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