ML042940226
| ML042940226 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  (NPF-003) |
| Issue date: | 05/16/2002 |
| From: | Siemaszko A, Swim T - No Known Affiliation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| FOIA/PA-2003-0187 02-0217-00 | |
| Download: ML042940226 (5) | |
Text
Davis-Besse Nuclear Power Station RED ENGINEERING WORK REQUEST L ORIGINAL l
DB-0044-0 ENGINEERING WORK REQUEST (EWR) NO.
I (x2-o,/-n STATEMENT OF PROBLEM Reactor Vessel Head had degraded because of boric acid corrosion.
0 CONTINUED SUS NO.
INITIATING DOCUMENT (IF APPLICABLE) 064-02 N/A PROPOSED CHANGE Replace existing Reactor Vessel Head. Also replace the existing Service Structure if required.
E CONTINUED INITIATOR (PRINT NAME) I,IGNATURE EXT.
l DATE SUPERVISOR (PRINT NAME) I SIGNATURE DATE P.K.GOYAL 7351 5/15/02 T.S.SWIM l
5/15/02 DESIGN BASS ENGINEER
-i-
--V-;
0 ACCEPTED 0 REJECTED-AltachJustfiication OCOMMERCIAL CHANGE l ODOCUMENT ONLY CHANGE 0 EQUIVALENT CHANGE TOSIMPLE CHANGE MAJOR CHANGE BYES INTERIM DESIGN PACKAGE E NO (SCs, ECs, or MCs ONLY)
DESIGN BASIS ENGINEERING SUPERVISOR (PRINT NAME) I SIGNATURE J
DATE TrctIt4
/
___SA_/o_
o NOT APPUCABLE I DESIB AIS ENGINE IG NER (PRINTNAME)/SIGNATURE DATE W REQUEST FOR PROVED R (
NAME)
D)ESIGN EFFORT TO I
/
BEGIN IMMEDIATELY OREJECTED l e-la
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SYSTEMTEAM EV;EW;f S
i PRIORITY:.
T E:
13j le ESTIMATED COST:
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APPROVED SYSTEM TEAM LEADER
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_ REJECTED t
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.BLDGED RY APPROVA, DAPPROVED MANAGER - DESIGN BASIS ENGINEERING (for SCs & MCs S 50K)
DATE OREJECTED - Attch Justification CIAPPROVED MANAGER - MAINTENANCE (for SCs & MCs 550K)
DATE OREJECTED - Attach Justification ACCOUNTING WORK ORDER NUMBER
- 3 Q O&M PRC CHAIRPERSON (Conceptual Design - MC Only)
DATE PRC CHAIRPERSON (Detail Dsll DATE O APPROVED t9kPPROVED I
/
OREJECTED I
IO(REJECTED 79 (C7
ENCINEERING CHANGE / PROJECT DISPOSITION WORKSHEET Page 1 of 4 DB-0097-0 ENGINEERING CHANGE I PROJECT DISPOSITION WORKSHEET Section A Initiation Document Number:
EWVR 02-0217 PE Andrew Siemnaszko OTHER System Team Member:
DE Prasoon Goyal, Peter Sadowyj OPS Bob Lakis Section B Problem Description Reactor Head Wastage Problem Summary:
Reactor Head requires replacement.
O Continued Section C Do Nothing Option Risk Associated with Doing Nothing:
Modification is required due to wastage identified on existing head. Doing Nothing is not an option.
o Continued Team Recommends Taking No Action System Team Leader Date
' ENGIIJEERING CHANGE / PROJECT DISPOSITION WORKSHEET D1B-0097-0 Page 2 of 4 ENGINEERING CHANGE I PROJECT DISPOSITION WORKSHEET Section D Alternative Solutions Considered Description of Alternative Number 1 of 2 Repair damage to existing head. This option was already persued under EWRs 02-0111 "RV Head Repair* and EWR 02-0112 hReactor Vessel Head CRDM Relocation". Davis-Besse management elected to abandon repair option in favor of Head replacement.
Associated Risks:
Repair option required prior NRC approval with no assurance that final repair configuration would be accepted by regulators.
Preliminary Cost Estimate:
a
<S25K 1 Continued El cS25 - S50K 0 <$50-$100K 0 >S100K Description of Alternative Number 2 No Other Options Available.
Associated Risks:
N/A Preliminary Cost Estimate:
l 425K C Continued 1-1 <S25 - S50K 1-1 450-SlOOK 1- !,Slnooz El <S25-SSOK fl S5o-SiooK fl 1flflK
ENGINEERING CHANGE / PROJECT DISPOSMON WORKSHEET OB-0097 -O Page 3 of 4 ENGINEERING CHANGE / PROJECT DISPOSITION WORKSHEET Section E Justification for Recommendation of Alternative 1 0 Addresses Plant Safety Issue 0 Addresses Regulatory Issue El Annual Radiation Exposure Reduction of [ ] Man Rem 0
Improved Reliability 0 Annual Cost Savings of [S ] with a [ ] year payback period o
Improved Capacity-Increase[ ] Mwe Supporting Explanation:
The reactor head must be replaced before plant can restart from 13RFO. Not implementing this change will prevent restart.
0 Continued Section F Plant Chancie Implementation Recommendation and Constraints Recommended Priority and Implementation Cycle (provide Justification):
13 RFO - must be completed prior to startup from 13 RFO.
OperationaVConstructability Implementation Constraints:
None Material Constraints:
Material available, usable replacement head Is available from Consumers Energy Midland site.
i.'), -
D Continued Date
/
6t System Team Leader U
Pann A ^f A ENGiNEERING CHANGE / PROJECT DISPOSITION WORKSHEET r OB-0097-O ENGINEERING CHANGE / PROJECT DISPOSITION WORKSHEET Continuation Sheet