ML063400100: Difference between revisions
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| number = ML063400100 | | number = ML063400100 | ||
| issue date = 10/24/2006 | | issue date = 10/24/2006 | ||
| title = | | title = E-MAIL: (PA) Communications Package | ||
| author name = Hufnagel J | | author name = Hufnagel J | ||
| author affiliation = Exelon Corp | | author affiliation = Exelon Corp | ||
Line 28: | Line 28: | ||
Thank You. | Thank You. | ||
D. Ashley - TEXT.htm Page D. Ashley TEXT.htm | D. Ashley - TEXT.htm Page D. Ashley TEXT.htm Page 1I 1 ii Donnie, Here's the package we used in our discussions with Region I yesterday - you may have this already... | ||
Page 1I 1 ii Donnie, Here's the package we used in our discussions with Region I yesterday - you may have this already... | |||
- John. | - John. | ||
<<Comm Doc - Drywell Inspections 10-23-06 alex.ppt>> | <<Comm Doc - Drywell Inspections 10-23-06 alex.ppt>> | ||
Line 36: | Line 34: | ||
This e-mail is intended solely for the use of the individual or entity to which it is addressed. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution, copying, or action taken in relation to the contents of and attachments to this e-mail is strictly prohibited and may be unlawful. If you have received this e-mail in error, please notify the sender immediately and permanently delete the original and any copy of this e-mail and any printout. | This e-mail is intended solely for the use of the individual or entity to which it is addressed. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution, copying, or action taken in relation to the contents of and attachments to this e-mail is strictly prohibited and may be unlawful. If you have received this e-mail in error, please notify the sender immediately and permanently delete the original and any copy of this e-mail and any printout. | ||
Thank You. | Thank You. | ||
c:\temp\GW)O0001 .TMP page -I Pn Mail Envelope Properties (453E2461.EC9: 3: 48841) | c:\temp\GW)O0001 .TMP page -I Pn Mail Envelope Properties (453E2461.EC9: 3: 48841) | ||
Line 73: | Line 70: | ||
PRELIMINARY 3 | PRELIMINARY 3 | ||
D. Ahle omm Doc - Drywell Inspec~tions 10-23-06aexptPg4 | D. Ahle omm Doc - Drywell Inspec~tions 10-23-06aexptPg4 Inspection Status (To Date) | ||
Inspection Status (To Date) | |||
" The Ultrasonic Inspections of the Interior Surface of the Drywell in the Sand Bed regions have been completed. | " The Ultrasonic Inspections of the Interior Surface of the Drywell in the Sand Bed regions have been completed. | ||
* The Ultrasonic Inspections of the Interior Surface of the Drywell in the Upper regions are in progress. | * The Ultrasonic Inspections of the Interior Surface of the Drywell in the Upper regions are in progress. | ||
Line 93: | Line 88: | ||
D. Ashlev - Comm Doc - Drvwell InsDections 10-23-06 alex.vr)t Pa*e] | D. Ashlev - Comm Doc - Drvwell InsDections 10-23-06 alex.vr)t Pa*e] | ||
Paae 71 D. Ashley Comm Doc Drvwell lnsnections 10-23-06 alex.DDt | Paae 71 D. Ashley Comm Doc Drvwell lnsnections 10-23-06 alex.DDt Issue Description | ||
Issue Description | |||
" When performing planned Non Destructive Examinations of the Drywell Shell from inside the Drywell, water was found in a trench area below the floor elevation. | " When performing planned Non Destructive Examinations of the Drywell Shell from inside the Drywell, water was found in a trench area below the floor elevation. | ||
" A similar condition was identified in the mid 1990s and documented in the corrective action process. | " A similar condition was identified in the mid 1990s and documented in the corrective action process. | ||
Line 117: | Line 110: | ||
#$CALF. W%ý | #$CALF. W%ý | ||
D. Ashley - Comm Doc - Drywell Inspections 10-23-06 Page6 D. Ashley Com~n Doc Drywell Inspections 10-23-06 alex.ppt Page f12 12~J Top View - Drywell Floor Sketch 12 | |||
D. Ashley - Comm Doc - Drywell Inspections 10-23-06 Page6 D. Ashley Com~n Doc Drywell Inspections 10-23-06 alex.ppt | |||
Page f12 12~J Top View - Drywell Floor Sketch 12 | |||
D. Astýley - Comm Doc - Drywell Inspections 10-23-06a"ýpp Page 13~ | D. Astýley - Comm Doc - Drywell Inspections 10-23-06a"ýpp Page 13~ | ||
13 D.Ashley Comm Doc- Drywell Inspections 10-23-06 alex.ppt | 13 D.Ashley Comm Doc- Drywell Inspections 10-23-06 alex.ppt Page As Found Condition | ||
Page As Found Condition | |||
" Surface of drywell shell visible from trenches in Bays 5 and 17 exhibited a surface layer of iron oxide | " Surface of drywell shell visible from trenches in Bays 5 and 17 exhibited a surface layer of iron oxide | ||
" Approximately 5" of water found in bottom of trench in Bay # 5, and trench in Bay 17 had only dampness | " Approximately 5" of water found in bottom of trench in Bay # 5, and trench in Bay 17 had only dampness | ||
Line 145: | Line 131: | ||
" Correlation and evaluation of water levels in sump, trough and trench areas PRELIMINARY 14 | " Correlation and evaluation of water levels in sump, trough and trench areas PRELIMINARY 14 | ||
D. AsWey - Comm Doc - Drywell Inspections 10-23-06 alex.ppt Page 15t D. Ashjey- Comm ~Ooc Drywell Inspections 10-23-06 alex.ppt | D. AsWey - Comm Doc - Drywell Inspections 10-23-06 alex.ppt Page 15t D. Ashjey- Comm ~Ooc Drywell Inspections 10-23-06 alex.ppt Page 15~ | ||
Page 15~ | |||
Actions Planned/Pending | Actions Planned/Pending | ||
* Visual Examination (VT-1) of floor drain sump liner to look for evidence of a leak path | * Visual Examination (VT-1) of floor drain sump liner to look for evidence of a leak path |
Latest revision as of 22:47, 13 March 2020
ML063400100 | |
Person / Time | |
---|---|
Site: | Oyster Creek |
Issue date: | 10/24/2006 |
From: | Hufnagel J Exelon Corp |
To: | Ashley D Office of Nuclear Reactor Regulation |
References | |
%dam200701, TAC 8261 | |
Download: ML063400100 (19) | |
Text
D. Ashley - Communications package Paqe.,P.+.e 11 D. Ashley" C om munications packaq4 " ... . .. . . ...................... ....................................................... 1,4 From: <john.hufnagel@exeloncorp.com>
To: <djal @nrc.gov>
Date: 10/24/2006 10:34:26 AM
Subject:
Communications package Donnie, Here's the package we used in our discussions with Region I yesterday - you may have this already...
- John.
<<Comm Doc - Drywell Inspections 10-23-06 alex.ppt>>
This e-mail and any of its attachments may contain Exelon Corporation proprietary information, which is privileged, confidential, or subject to copyright belonging to the Exelon Corporation family of Companies.
This e-mail is intended solely for the use of the individual or entity to which it is addressed. Ifyou are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution, copying, or action taken in relation to the contents of and attachments to this e-mail is strictly prohibited and may be unlawful. If you have received this e-mail in error, please notify the sender immediately and permanently delete the original and any copy of this e-mail and any printout.
Thank You.
D. Ashley - TEXT.htm Page D. Ashley TEXT.htm Page 1I 1 ii Donnie, Here's the package we used in our discussions with Region I yesterday - you may have this already...
- John.
<<Comm Doc - Drywell Inspections 10-23-06 alex.ppt>>
This e-mail and any of its attachments may contain Exelon Corporation proprietary information, which is privileged, confidential, or subject to copyright belonging to the Exelon Corporation family of Companies.
This e-mail is intended solely for the use of the individual or entity to which it is addressed. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution, copying, or action taken in relation to the contents of and attachments to this e-mail is strictly prohibited and may be unlawful. If you have received this e-mail in error, please notify the sender immediately and permanently delete the original and any copy of this e-mail and any printout.
Thank You.
c:\temp\GW)O0001 .TMP page -I Pn Mail Envelope Properties (453E2461.EC9: 3: 48841)
Subject:
Communications package Creation Date 10/24/2006 10:28:27 AM From: <john.hufnagel @exeloncorp.com>
Created By: iohn.hufnagel @exeloncorp.com Recipients nrc.gov OWGWPOO1.HQGWDO01 DJA1 (D. Ashley)
Post Office Route OWGWPOO1.HQGWDOO1 nrc.gov Files Size Date & Time MESSAGE 1053 24 October, 2006 10:28:27 AM TEXT.htm 1656 Comm Doc - Drywell Inspections 10-23-06 alex.ppt 358400 Mime.822 495999 Options Expiration Date: None Priority: Standard ReplyRequested: No Return Notification: None Concealed
Subject:
No Security: Standard Junk Mail Handling Evaluation Results Message is eligible for Junk Mail handling This message was not classified as Junk Mail Junk Mail settings when this message was delivered Junk Mail handling disabled by User Junk Mail handling disabled by Administrator Junk List is not enabled Junk Mail using personal address books is not enabled Block List is not enabled
P. Ashley 7 Comm Doc - Drywel inspections 10-23-06alxý ptPae Oyster Creek 1R21 Outage Communication Package Related to Drywell Shell Inspections October 23, 2006 PRELIMINARY I
D. Ashe Y -'Comm Doc - DR nspecioýns 10-23-6 .alex.ppt ......
1R21 Drywell Inspections
- Reactor Cavity Trough Drain Line
- Sand Bed Region Poly Bottles
- Sand Bed Drain Lines
- Epoxy Coating on External Surface of Drywell Sandbed in all 10 Bays
- Internal Drywell Shell in Sand Bed Region Above Floor Elevation
- Internal Drywell Shell in Upper Regions
- Seal at the junction between drywell shell and concrete floor in Sand Bed Region
" External Drywell Shell in Sand Bed Region
- Plate Thickness Transitions at Two Elevations
- Internal Drywell Shell in Trenches (Bays 5 and 17)
PRELIMINARY 2
Page 3 ~i D.Ashley D. - Doc - Drywell Comm Doe Ashley - Comm - 10-23-06 alex.ppt Inspections 10-23-06 Drywell Inspections alex.ppt Page 3 Inspection Status (To Date)
" The reactor cavity trough drain line is not clogged and is successfully removing a small amount of water entering the trough. Daily water leakage monitoring continues (as planned, strippable coating was applied to reactor cavity before flood-up).
- There has been no water observed in the Sand Bed Regions and no water coming down through the air gap.
" There has been no water leakage from the Sand Bed Regions confirmed by the absence of water in the poly bottles. Daily monitoring of the poly bottles continues.
- Two of the five Sand Bed drain lines were found to have some blockage and debris. These will be cleaned prior to restart.
- The visual inspection of the epoxy coating on the external shell surface in the Sand Bed regions has been completed.
- The seal at the junction of the drywell shell and the concrete floor in the Sand Bed region has-been inspected.
PRELIMINARY 3
D. Ahle omm Doc - Drywell Inspec~tions 10-23-06aexptPg4 Inspection Status (To Date)
" The Ultrasonic Inspections of the Interior Surface of the Drywell in the Sand Bed regions have been completed.
- The Ultrasonic Inspections of the Interior Surface of the Drywell in the Upper regions are in progress.
" The Ultrasonic Inspections of the Exterior Surface of the Drywell in the Sand Bed regions are completed.
- The Ultrasonic Inspections of the plate thickness transitions at two locations are in progress.
- The Ultrasonic Inspections of the Interior Surface of the Drywell in the Trenches in Bays 5 & 17 have been completed.
PRELIMINARY 4
D: Ash ...C - e Inspections 0-23-06a lexx.pp. Page5 Issues Identified
" Standing water was identified in the trench inside the Drywell at the Drywell floor level in Bay 5 when the foam fill was removed for planned inspections.
" Dampness was identified in the other trench in Bay 17; however, no standing water was present.
" The Drywell drain trough may be a contributor to water leakage into the trench in Bay 5.
PRELIMINARY 5
alex.ppt Page 6 D. - Doc-D~eII Comm Doe Ashley - Comm D. A01ey Inspections 10-23-06
- Drywell Inspections 10-23-06-0ýx-,W Pa Water in Bay 5 Trench Description of Findings and Actions to Resolve this Issue PRELIMINARY 6
D. Ashlev - Comm Doc - Drvwell InsDections 10-23-06 alex.vr)t Pa*e]
Paae 71 D. Ashley Comm Doc Drvwell lnsnections 10-23-06 alex.DDt Issue Description
" When performing planned Non Destructive Examinations of the Drywell Shell from inside the Drywell, water was found in a trench area below the floor elevation.
" A similar condition was identified in the mid 1990s and documented in the corrective action process.
" The source of this water needs to be understood and addressed, and any impact on the drywell shell or concrete evaluated and addressed.
PRELIMINARY 7
D. Ashlev Comm Doc - Drvwell InsDections 10-23-06 alex.ppt Pýge I D. Ashley Comm Doc Drvwell Inspections 10-23-06 alex.Dot
- - Paae8.
Drywell Design and Layout
- The Drywell floor drain sump is located within the under-vessel area room
" A concrete trough encircles the under-vessel area to channel any leakage in the drywell to the drywell sump PRELIMINARY
Page 94
ý. Drywell Inspections Ashley - Comm Doe - D"911
- 0. Asýley - - 10-23-06 a~x.ppt ln~~ctions 1O:23~O6 aIpej.ppt age 9, Sketch Showing Lower Drywell - Sandbed, Trench and Sump
~bI1JAC~
O-23-O6aiex.ppt Page 1O~I D. - Comm Doc Ashley - Comm D. Ashley - Inspections 1 Drywell Inspections Doc - Drywell 10-23-06 alex.ppt Pagei10 Trench Detail Sketch DENSITY RILICONE DRYWELL VARIES CROSS-SECTION AREA OF TRENCHES IN BAYS 5 & 17
Pa eli D. - Comm Doe P. Ashley - Comm - Dryweli Inspections Doc-Drywell 10-23-06 alex.ppt Inspections 10-23-06 alex.ppt Plan View of Trough and Trenches 11 KEY PLAN
- $CALF. W%ý
D. Ashley - Comm Doc - Drywell Inspections 10-23-06 Page6 D. Ashley Com~n Doc Drywell Inspections 10-23-06 alex.ppt Page f12 12~J Top View - Drywell Floor Sketch 12
D. Astýley - Comm Doc - Drywell Inspections 10-23-06a"ýpp Page 13~
13 D.Ashley Comm Doc- Drywell Inspections 10-23-06 alex.ppt Page As Found Condition
" Surface of drywell shell visible from trenches in Bays 5 and 17 exhibited a surface layer of iron oxide
" Approximately 5" of water found in bottom of trench in Bay # 5, and trench in Bay 17 had only dampness
" Connection between under-vessel area trough and floor drain sump potentially allowing water leakage
" Trough located in the under-vessel area is,not lined, potentially allowing water passage into the concrete slab PRELIMINARY 13
D. Ashlev - Comm Doc - Dwell lnsDecti6n"s'1'6-23-66'ýali'e'-x'.-r)Dt Pa e
.. A
.. sh e C omm.. .Doc - . ... s.. ecti.
.'D.... ........................... . le.....
o........s.....10-23-06.......
.. ...... ... ..... . . ....... ...................... .. -e14 ***,,
Investigative/Corrective Actions Completed
" Visual inspections and pictures taken of sump, trough and trench areas
- Visual and Ultrasonic examinations of drywell shell in trench areas (as originally planned)
" Chemical Analysis of water samples from trench, sump and other areas
" Correlation and evaluation of water levels in sump, trough and trench areas PRELIMINARY 14
D. AsWey - Comm Doc - Drywell Inspections 10-23-06 alex.ppt Page 15t D. Ashjey- Comm ~Ooc Drywell Inspections 10-23-06 alex.ppt Page 15~
Actions Planned/Pending
- Visual Examination (VT-1) of floor drain sump liner to look for evidence of a leak path
" Tracer test aimed at determining whether under-vessel trough is in communication with trench in Bay 5
- Development of contingency repair to trough to address likely water source into trench
- Complete non destructive examination and analysis of Drywell shell in trench areas
- Perform evaluation of the impact of water that may exist beneath concrete surface on drywell shell
" Development of contingency repair to caulk intersection of Drywell Shell and concrete slab curb PRELIMINARY 15
D. A~se,- Comm Doc - Drynwel Inspections 10-23-06 alex~ppt 1---1
- *l Page 16 110 Current Conclusions
- Preliminary Inspection Results indicate that the Drywell Shell
- Retains its structural integrity
- Provides margin to design safety function
- Supports plant operation for the period of extended operation PRELIMINARY 16