ML18038B892
| ML18038B892 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 06/12/1997 |
| From: | Wichman K NRC (Affiliation Not Assigned) |
| To: | Williams J NRC (Affiliation Not Assigned) |
| References | |
| NUDOCS 9706130260 | |
| Download: ML18038B892 (6) | |
Text
HEMORANDUM TO:
FROM:
SUBJECT:
brune 12, 1997 Joseph F. Williams, Project Manager Project Directorate II-3 Division of Reactor Projects, I/II Keith R. Wichman, Chief Section A
Materials and Chemical Engineering Branch Division of Engineering REQUEST FOR ADDITIONAL INFORMATION REGARDING THE FLAW DENSITY IN REACTOR PRESSURE VESSEL WELDS FOR BROWNS FERRY UNIT 3 The Materials and Chemical Engineering Branch is reviewing a BWRVIP-05 submittal which requests that the staff reduce the amount of inspection of reactor pressure vessel (RPV) welds.
This issue affects Browns Ferry as well as all other BWR 2-6 plants.
In our evaluations, we assume a flaw density to determine the probability of vessel failure.
We would like to utilize the Browns Ferry Unit 3 RPV examination results to confirm the density of flaws in vessel welds.
In order to accomplish this task, we need to know the flaw density in the Browns Ferry Uni't 3 axial and circumferential welds inspected during the Unit 3 Cycle 5 outage.
We also need to know the number of recordable flaws in the axial and circumferential welds.
Attached is a list of the information needed.
Attachment:
As stated Docket No.:
50-296 DISTRIBUTION:
PUBLIC
~~F'i'le Cen~e~
EHCB RF/PF G: iLEEiKHANNA.RAI To receive a copy of this docisnent, indicate in the box C=Copy u/o attachment enc(osure E=Copy with attachment/enciosure N = No co OFFICE NAME DATE 6//t /97 6//4/97 OFFICIAL RECORD COPY DE:EHCB DE:EHCB HKhanna~~
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axe 12, 1997 HEHGRANDUM TO:
Joseph F. Williams, Project Manager Project Directorate II-3 Division'of Reactor Projects, I/II FROM:
SUBJECT:
Keith R.
Wichman, Chief Section A,
Materials and Chemical Engineering Branch Division of Engineering REQUEST FOR ADDITIONAL INFORMATION REGARDING THE 'FLAW DENSITY IN REACTOR PRESSURE VESSEL WELDS FOR BROWNS FERRY UNIT 3 The Materials and Chemical Engineering Branch is reviewing a BWRVIP-05 submittal which requests that the staff reduce the amount of inspection of reactor pressure vessel (RPV) welds.
This issue affects Br owns Ferry as well as all other BWR 2-6 plants.
In our evaluations, we assume a flaw density to determine, the probability of vessel failure.
We woul'd like to utilize the Browns Ferry Unit 3 RPV examination results to confirm the densi.ty of flaws in vessel welds.
In order to accomplish, this task, we need to know the flaw density in the Browns Ferry Unit 3 axial and circumferential welds inspected during the Unit 3 Cycle 5 outage.
We also need 'to know the number of recordable flaws in the axial and c'ircumferential welds.
Attached is a list of the information needed.
Attachment:
As stated Docket No.:
50-296 DISTRIBUTION:
PUBLIC File Center JStrosnider EHCB RF/PF G:iLEEiKMANNA.RAI To receive a copy of this docunent, indicate in the box C=Copy w/o attachment/enclosure E~Copy with attachment/enclosure M ~ No co
/
OFFICE DE: EHCB DE:EMCB DE'AME DATE MKhanna~~~
BEl,liot8 6//+97 6/fl /97 OFFICIAL RECORD COPY KW an 6//"
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I
e uest For Additiona Info mation:
The Materials and Chemical Engineering Branch. is requesting that Tennessee Valley Authority provide the following information regarding the reactor pressure vessel shell welds augmented examination that was conducted for Browns Ferry Unit 3 during the Cycle 5 extended outage:
The number of, recordable indications in the axial welds and the number of recordable indications in the circumferential welds.
2.
The volume of the axial welds and the volume of the circumferential~
Attachment
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