ML13330B449
| ML13330B449 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 12/30/1988 |
| From: | Medford M SOUTHERN CALIFORNIA EDISON CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| NUDOCS 8901040243 | |
| Download: ML13330B449 (9) | |
Text
Southern California Edison Company P. 0. BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD, CALIFORNIA 91770 M.0.MEFORD DeTELEPHONE MANAGER OF D(818) 302-1749 NUCLEAR REGULATORY AFFAIRS U. S. Nuclear Regulatory Commission Attention:
Document Control Desk Washington, D.C.
20555 Gentlemen:
Subject:
Docket No. 50-206 Seventh Edition of the Integrated Implementation Schedule (IIS)
San Onofre Nuclear Generating Station Unit 1
Reference:
Letter, M. 0. Medford, SCE, to NRC, dated May 27, 1988 The sixth edition of the IIS was submitted by the referenced letter. The IIS Program Plan required by License Condition 3.3, specifies that SCE provide semi-annual updates of backfit schedules to the NRC. Accordingly, enclosed is the seventh edition of the IIS.
If there are any questions on the enclosure or if you require additional information, please let me know.
Very truly yours, Enclosure cc:
J. B. Martin, Regional Administrator, NRC Region V F. R. Huey, NRC Senior Resident Inspector, San Onofre Units 1, 2 and 3 PDCt P~i 0,DCc~f
.'()C)2 0 /
PDlc:
Enclosure INTEGRATED IMPLEMENTATION SCHEDULE SAN ONOFRE NUCLEAR GENERATING STATION, UNIT 1 Seventh Edition December 1988 Introduction License Condition 3.3, "Integrated Implementation Schedule," requires SCE to follow the IIS Program Plan ("Plan").
The Plan specifies that periodic schedule updates be submitted to the NRC along with specific information regarding progress in implementing NRC requirements, changes since the previous report, reasons for schedule changes and the expected percentage allocation of resources on regulatory vs. betterment projects.
This document is the seventh edition of the IIS which provides that information.
Progress in Implementing NRC Requirements Since submittal of the last IIS update in May 1988, SCE completed a scheduled mid-cycle outage which began in February 1988. During the outage extensive maintenance was performed and progress was made on certain IIS projects. The Regulated Instrument Buses Indicating Lights and Reactor Cavity Safety Cage (OSHA) projects were completed. The Environmental Qualification Project was also largely completed except for continuing work associated with resolution of items which previously had JCO's. During the current refueling outage the following projects are also expected to be completed except that the Automatic Vent System for the Boric Acid System project may not be completed until shortly after the outage is over.
Automation of Third Auxiliary Feedwater Pump Steam/Feedwater Mismatch Trip Modifications Automatic Termination of Safety Injection Pumps on Low RWST Level Automatic Vent System for the Boric Acid System Single Failure Analysis Modifications Automatic Slow Start Modifications for Emergency Diesel Generators In addition, several other projects have been added since the last edition and are being completed this outage. These are:
Addition of Back-up Nitrogen System for FCV's 456, 7, 8 LLRT Provisions for CV's 702 A, B, C, D Back-up Nitrogen Systems Modifications Emergency Diesel Generator Battery Train Alignment Anaconda Cable Replacement
-2 Changes Since Last Edition There have been several changes since the sixth edition of the IIS. In addition to the projects listed above which were added since the last edition and are being completed during the current outage, the following projects have been added to Schedule B for Cycle XI and beyond:
Safety Injection System Modifications Charging Pumps Motor Rewind Design Basis Precipitation Modifications (Roof Scuppers)
Control Room Design Review The first project was the subject of a letter from M. 0. Medford, SCE, to the NRC, dated October 26, 1988. In that letter, we indicated that we do not think modifications to the SIS are warranted, but that we were scheduling the modifications for the Cycle XI refueling outage, subject to NRC approval of SCE's proposed design by February 1989. We further indicated that resources would be better spent on upgrading the recirculation portion of the system.
The second project is the Charging Pumps Motor Rewind. This project will rewind the charging pump motors as they reach the end of their qualified life.
The third project added this edition is the Design Basis Precipitation Modifications (Roof Scuppers) to which we committed in our September 14, 1988 letter. These modifications will provide adequate drainage of the ventilation and fuel storage building roofs during a design basis precipitation event.
The last project added, Control Room Design Review, was the subject of a letter from M. 0. Medford, SCE, to the NRC, dated December 17, 1987.
This project identified many modifications of differing priorities. We have broken down the projects into three groups, A, B, and C for scheduling. The groups are broken down as follows (projects are as described in Section 10.2.2 of the report submitted with the above letter). It should be noted that some shuffling of implementation schedules (i.e., from one cycle to another) for individual HED's within these groups may occur as further integration of these modifications is determined during final engineering.
Group A Relocate Instrumentation and Controls on Panel C09 Protective Switch Covers and Barriers Surface Enhancements Communications/Miscellaneous Re-Design of Diesel Generator Panels Remove Safety Injection Test Switches
-3 Group B Relocate Control Room Instrumentation and Controls Remove Abandoned Equipment Install New Equipment Group C Remaining Annunciators (two HED Groups)
Unsuitable Equipment (two HED groups)
Another change since the last edition of the IIS is the appearance of the SEP evaluations and the Station Blackout evaluation. The SEP project evaluations are all being performed by SCE as a result of findings documented in NUREG-0829, Integrated Plant Safety Assessment Report, for SONGS 1. The schedules for these projects are taken from our November 18, 1988 letter on the SEP. The Station Blackout is being performed as required by regulation.
Several projects have been rescheduled in this edition to reflect the addition of the Safety Injection System Modifications in Cycle XI.
The following projects have been deferred to the Cycle XII refueling outage:
Upgrade of Core Exit Thermocouples for Detection of Inadequate Core Cooling Control Room and Technical Support Center HVAC Upgrades In-Service Testing Instrumentation It should also be noted that the project to add steel decking under the north turbine extension no longer appears on the IIS. This project was cancelled as indicated in SCE's September 29, 1988 letter regarding heavy loads.
- However, this issue is being reexamined in light of recent issues associated with transshipment of spent fuel from San Onofre Unit 1 to Units 2 and 3.
Expected Allocation of Resources for Upcoming Outage The current refueling/backfit outage for Cycle X of plant operation is expected to have resources allocated approximately 70% to regulatory projects and 30% to betterment projects. This allocation reflects a balancing of resource allocation following the last refueling/backfit outage which was 85% regulatory work.
Updated Schedules Schedules A, B and C are attached.
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ATTACHMENT IIS SCHEDULE A (RULE, REGULATION OR ORDER)
CYCLE X NONE CYCLE XI ANTICIPATED TRANSIENTS WITHOUT SCRAM DIVERSE TURBINE TRIP EVALUATIONS FSA UPDATE DECEMBER 30, 1988 STATION BLACKOUT EVALUATION APRIL 17, 1989 SIMULATION FACILITY EVALUATION NOVEMBER 26, 1990
IIS SCHEDULE B (NRC COMMITMENTS AND OTHER REQUIREMENTS)
CYCLE X AUTOMATION OF THIRD AUXILIARY FEEDWATER PUMP STEAM/FEEDWATER MISMATCH TRIP MODIFICATIONS AUTOMATIC TERMINATION OF SAFETY INJECTION ON Low RWST LEVEL REGULATED INSTRUMENT BUS INDICATING LIGHTS*
REACTOR CAVITY SAFETY CAGE (OSHA)*
AUTOMATIC VENT SYSTEM FOR BORIC ACID SYSTEM SINGLE FAILURE ANALYSIS MODIFICATIONS ENVIRONMENTAL QUALIFICATION MODIFICATIONS*
AUTOMATIC SLOW START MODIFICATIONS FOR EMERGENCY DIESEL GENERATORS ADDITION OF BACK-UP NITROGEN SYSTEM FOR FCVS 456,7,8 LLRT PROVISIONS FOR CV-702 A,B,C,D MODIFICATIONS TO BACK-UP NITROGEN SYSTEMS DIESEL GENERATOR BATTERY TRAIN ALIGNMENT ANACONDA CABLE REPLACEMENT CYCLE XI SAFETY INJECTION SYSTEM MODIFICATIONS CHARGING PUMP MOTOR REWIND ON-SITE TOXIC GAS SOURCES MODIFICATIONS DESIGN BASIS PRECIPITATION MODIFICATIONS
- THESE PROJECTS WERE COMPLETED DURING THE MID-CYCLE OUTAGE.
IIS SCHEDULE B (NRC COMMITMENTS AND OTHER REQUIREMENTS) (CONTINUED)
CYCLE XII CONTROL ROOM DESIGN REVIEW GROUP A MODIFICATIONS UPGRADE CORE EXIT THERMOCOUPLES CONTROL ROOM AND TECHNICAL SUPPORT CENTER HVAC MODIFICATIONS IN-SERVICE TESTING INSTRUMENTATION REMOVAL OF AUTOMATIC REACTOR COOLANT PUMP TRIP ON SAFETY INJECTION CVCS VALVES MOV-LCV-1100 B,C,D ADDITION OF SYNCHROCHECK RELAYS TO EMERGENCY DIESEL GENERATORS UNDERVOLTAGE RELAYS FOR PROTECTION FROM DEGRADED GRID VOLTAGE WASTE GAS DECAY TANK MONITORING INSTRUMENTATION CYCLE XIII CONTROL ROOM DESIGN REVIEW GROUPS B AND C MODIFICATIONS EVALUATIONS SEISMIC QUALIFICATION OF ELECTRICAL ONGOING EQUIPMENT SEP TOPIC III-1, CLASSIFICATION OF MARCH 30, 1989 COMPONENTS SEP TOPicS III-5.A, EFFECTS OF PIPE DECEMBER 30, 1988 III-5.B, BREAKS ON STRUCTURES, III-7.B, SYSTEMS AND COMPONENTS V-5, INSIDE CONTAINMENT, PIPE BREAK OUTSIDE CONTAINMENT SEP TOPICS IV-7.C.2, FAILURE MODE ANALYSIS MAY 31, 1989 IX-3,
IIS SCHEDULE B (EVALUATIONS) (CONTINUED)
SEP TOPIC VI-10.A, TESTING OF REACTOR TRIP DECEMBER 30, 1988 SYSTEM AND ENGINEERED SAFETY FEATURES, INCLUDING RESPONSE TIME TESTING SEP TOPIC XV-1, DECREASE IN FEEDWATER USI A-47 TEMPERATURE, INCREASE IN FEEDWATER FLOW, INCREASE IN SYSTEM FLOW, AND INADVERTENT OPENING OF A STEAM GENERATOR RELIEF OR SAFETY VALVE
IIS SCHEDULE C (BETTERMENT PROJECTS)
CYCLE X NIS REPLACEMENT TURBINE VIBRATION DETECTION INSTRUMENTATION*
RADIATION MONITOR SV-99 UPGRADE*
FUEL TRANSSHIPMENT MODIFICATIONS*
CONTAINMENT SPRAY PIPING REPLACEMENT*
CHEMICAL LAB RENOVATION VCT TEMPERATURE INSTRUMENT REMOVAL*
SEAWALL CORROSION MONITORING -
INSPECTION IMPROVEMENTS KAPTON INSULATED CABLE PROTECTIVE MEASURES*
CYCLE XI NONE CYCLE XII INSTRUMENT RACK REPLACEMENT THESE PROJECTS WERE COMPLETED DURING THE MID-CYCLE OUTAGE.
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