ML042990023
| ML042990023 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 09/09/2002 |
| From: | - No Known Affiliation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| FOIA/PA-2003-0187, NOP-LP-2001-01 02-05705 | |
| Download: ML042990023 (1) | |
Text
NOP-LP-2001 -01 CONDITION REPORT lCR Number TITLE: CLADDING CRACK FOUND IN ORIGINAL RVH CAVITY l02-05705 DISCOVERY DATE i IM lEVN DATE TIME I SYSTEM I ASSET#
91612002 lNIA
_IVatAtNA NIA EQUIPMENT DESCRIPTION Original Davis-Besse Reactor Head Cavity DESCRIPTION OF CONDITION and PROBABLE CAUSE (if known) Summarize any attachments. Identify what, when, where, why, how.
0 The 17" diameter specimen that was removed from the original Davis-Besse Reactor Pressure R
vessel is currently undergoing examination in a laboratory. The laboratory Informed Davis-Besse R
today that a crack approximately 3/8" long was found in the center of the exposed cladding area of l
the cavity. This new information will need to be evaluated for possible effects on the safety G;
significance analysis.
N The laboratory also performed cladding thickness measurements. The results were as follows:
A T
Average - 0.256" l
Minimum - 0.202" o
Maximum - 0.314" N
These results will also need to be evaluated to determine their effect on the safety significance analysis.
SUPV COMMENTS I IMMEDIATE ACTIONS TAKEN (Discuss CORRECTIVE ACTIONS completed, basis for closure.)
NA QUALITY ORGANIZATION USE ONLY IDENTIFIED BY (Check one)
I} Self-Revealed ATTACHMENTS Quality Org. initiated C] Yes R Individual/Work Group E
Internal Oversight Quality Org. Follow-up O Yes I] No L SupervisIon/Management i
External Oversightj0 Yes EI No ORIGINATOR ORGANIZATION DATE SUPERVISOR DATE I PHONE EXT.
//2002 MCLAUGHLIN. M 9/9=2002 8295 SRO EQUIPMENT EVALUATION IMMEDIATE I ORGANIZATION -'MODE CHANGE p
REVIEW OPERABLE REQUIRED INVESTIGATION REQUIRED NOTIFIED
'RESTRAINT L
E Yes RI No D Yes D No il N/A IYes t1 No E Yes E0 No YA lYes 0 No A
MODE ASSOCIATED TECH SPEC NUMBER(S)
ASSOCIATED LCO ACTION STATEMENT(S)
T 92 o
DECLARED REPORTABLE?
! One Hour NIA APPLICABLE UNIT(S)
NOPERABLE (Date lTlme) EYes RINo i
E NIA EEvat ReUtdk I
Other NWA I hI Ui _
2 UIJ Both R
COMMENTS A
N/A l
N Current Mode - Unit i Power Level -Unit i Current Mode-Unit2 Power Level -Unit 2 S
N/A NWA l
N/A N/A SRO -UNIT I SRO - UNIT 2 DATE Approved By Supv l NIA 9/912002 Page 1 of 2