ML040750184
| ML040750184 | |
| Person / Time | |
|---|---|
| Site: | Oconee  (DPR-038, DPR-047, DPR-055) |
| Issue date: | 03/08/2004 |
| From: | Duke Energy Corp |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML040720190 | List: |
| References | |
| Download: ML040750184 (12) | |
Text
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4-REACTOR TRIP BREA KER REPLA CEMENT Oconee Nuclear Station March 8, 2004
Duke Energ Ag~endia
- Introductions
- 10CFR 50.59 Application
- CRD Related Modifications
- RTB Interfaces
- . RTB replacement
- Technical Specification Change
- Closing Remarks 2
WDuke wn ergy 10 CFR 50.59 Application
- Oconee is undergoing extensive refurbishment to address equipment age and obsolescence issues
- CRDCS Upgrade is scheduled for implementation during the 3EOC21 RFO which begins October 7, 2004
- The 10CFR 50.59 rule is applied to all Oconee changes. RG 1.187 endorses NEI 96-07 which provides guidance in implementing the rule
- Section 4.1.1 of NEI 96-07, Rev.
proposed activities that require a the license amendment process, should be applied to the balance 1 clarifies that aspects of TS change must be made via while the 50.59 process of the modification
- The aspects of this modification (RTB replacement) directly related to the TS change were submitted to the NRC for review 3
Duke Energy CRD RELA TED MODIFICA TIONS SEENEENINOW-
_7 __ __ - -
z
- CRDM replacement
- RTB
- DCRDCS
- RPS
- CRD In-Containment Cables
- CRD Reactor Building Penetrations 4
i Duke TEnergy RTB INTERFACES
- . Non safety-related
- CRDCS
- Main Turbine Trip
- Generator Trip
- Main Steam Stop Valves
- Safety-related
- RPS undervoltage trip 5
Duke Energy RTB REPLACEMENT
- Existing configuration
- k New configuration
- .* Why change is acceptable
- & New RTB configuration similar to what is installed at later vintage B&W plants 6
k Duke
!Energy EXISTING RTB CONFIGURATION A Power B Power Supply Reactor Trip Switch Supply 7
k Duke
!Energy NEW RTB CONFIGURATION B Power tor Trio Switch Supply A Power Supply Reaci A
RPS A I
I I
RPS D
_4D-4_
600 VAC, 30 120 VAC, 60 Control I
I B
D 120 VAC, 60 Control 8
uke
-n ergy Methods for Dropping Control Rods
- .* RPS Automatic Trip
- Diverse Scram System Trip
- Source Interrupt Trip 9
Duke TECH SPECS FOR Energy CURRENT CONFIGURATION
- V LCO requires the following to be OPERABLE:
71 Two AC CRD trip breakers 71 Four DC CRD trip breakers; 71 Eight electronic trip assembly (ETA) relays 10
Duke PROPOSED TECH SPECS FOR energy NEW CONFIGURATION
- Eliminated requirements for non safety related ETA relay requirements
Duke 0Energy
- ,* Closing Remarks 12