ML20078J099
| ML20078J099 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 01/31/1995 |
| From: | Richard Anderson NORTHERN STATES POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9502070257 | |
| Download: ML20078J099 (4) | |
Text
Northem States Power Company Monticello Nuclear Generating Plant 2807 West Hwy 75 Monticello, Minnesota 55362-9637 January 31,1995 10 CFR 55.45 (b)(5)
US Nuclear Re0ulatory Commission Attn: Document Control Desk Washington, DC 20555 MONTICELLO NUCLEAR GENERATING PLANT Docket No. 50-263 License No. DPR-22 Certification of Plant-Referenced Simulator This submittal provides the information required by 10 CFR 55.45(b)(5)(ii) and 10 CFR 55.45.(b)(5)(vi) for the Monticello Nuclear Generating Plant simulator. The required four year certification report is provided as Attachment A. Certification of the Monticello Nuclear Generating Plant simulator was provided to the Commission by letter dated February 1,1991, from Thomas M Parker to the US Nuclear Regu!atory Commission, with subject " Certification of Plant-Referenced Simulator".
This submittal contains the following new NRC commitment:
The performance test discrepancies identified in section *E" of the attached certification report are to be corrected prior to December 31,1995.
Please contact Marv Engen, Sr Licensing Engineer, at (612) 295-1291 if you require further information.
d be W RogerO Anderson Director Licensing and Management Issues c:
Regional Administrator-lil, NRC NRR Project Manager, NRC Sr Resident inspector, NRC State of Minnesota Attn: Kris Sanda J Silberg
Attachment:
(A) Monticello Nuclear Generating Plant Simulator,4 Year Certification Report H : \\ DATA \\ NkCC0hh \\ SIM-CE RT. DOC
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Attachment A MONTICELLO NUCLEAR GENERATING PLANT SIMULATOR 4 YEAR CERTIFICATION REPORT A. Introduction The Monticello Simulator four year report is required to be submitted to the Nuclear Regulatory Commission in accordance with 10 CFR 55.45 on the fourth anniversary of the initial simulator certification report (February 1,1991).
The four year report identifies the fc!!owing:
- 1. Simulator changes.
- 2. Performance testing completeo in the 1991-1994 time period.
- 3. A description of tests to be performed in the subsequent four year period.
4 Uncorrected performance test failures.
- 5. A schedule for correction of performance '.est failures.
B. References Title 10, Code of Federal Regulations, pa,t 55, " Operator Licenses", Subpart E, Section 45.
ANSI 3.5,1985 " Nuclear Power Plant Simulators for use in Operator Training".
U.S. Nuclear Regulatory Guide 1.149 " Nuclear Power Plant Simulation Facilities for use in Operator License Examinations".
C. Maior simulator chanaes since initial certification 1.
The original Master-Slave 32/77 computer system was replaced by an Encore RSX system in December 1993.
Attachment A Page 2 January 31,1995 2.
Malfunctions added/ deleted:
DELETED
- CH22A - SDV VENT VALVES Fall OPEN
- CH22B - SDV DRAIN VALVES Fall OPEN
- ED17A-LOAD CENTER 107 FEEDER TRIP
- ED17B - LOAD CENTER 108 FEEDER TRIP
- PC05 - TORUS DRAIN
- PC11 - SECONDARY CONTAINMENT POSITIVE PRESSURE
- POO1-SPDS COMPUTER FAILURE
- RH03A-LPCI INJECTION VALVE FAILURE TO OPEN (LOGIC FAILURE)
- RH03B - LPCI INJECTION VALVE FAILURE TO OPEN (VALVE MOTOR FAILURE)
- RR28 - VARIABLE INSTRUMENT LINE BREAK OUTSIDE PRIMARY CONTAINMENT
- RX03 - CORE POWER OSCILLATIONS
- TC10 - TURBINE TRIP FAILURE 3.
All applicable reference plant modifications have been evaluated, installed and tested per Monticello Training Center Simulator Procedures.
D. Performance tests conducted 1991-1994 All simulator cedification tests for the years 1991-1994 have been completed as scheduled in the initial Monticello Simulator Certification report (Appendix 13). The following list reiterates the categories of testing performed.
1 1.
Normal Plant Evolutions as identified in ANSI /ANS 3.5-1985 Section 3.1.1.
2.
Certified Malfunctions as identified in ANSI /ANS 3.5-1985 Section 3.1.2.
3.
Steady State and Transient Performance tests as identified in ANSI /ANS 3.5-1985 Section 5.4.2 and Appendix B.
4.
Computer Real Time as identified in ANSI /ANS 3.5-1985 Section 3.1.1.
2
l
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Attachment A Page 3 January 31,1995 5.
Simulator Environment as identified in ANSI /ANS 3.5-1985 Sections 3.2.1 and 3.2.2.
All tests were satisfactory except as delineated in part E of this report.
F. Performance test schedule 1995-1998 Performance tests will be conducted as identified in Appendix 13 of the initial Monticello Simulator Certification Report. Simulator malfunctions added since the initial report will be included in the malfunction test list and tested per the schedule.
E. Uncorrected performance test discrepancies 1991-1994 4
t
- 1. Transient Tests
- a. TZO5 " Simultaneous trip of both Recirculation pumps"(1994)
Problem: Total Core Flow decrease and control rod operating line do not match i
plant data and estimates.
I
- 2. Steady State Performance Tests I
- a. US02A - 100% Steady State Performance (1994) l Problem: Individual Recirculation Loop & Total Loop flows are outside acceptable limits as compared to actual plant data.
G. TEST FAILURE RESOLUTION Operations instructors have been notified of the performance discrepancies to ensure that simula'.or training will not be adversly affected. Both test failures will be corrected with the installation of an improved Core & Thermohydraulics software model. This model will be installed and ready for training by 31 December 1995.
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