ML14058A025: Difference between revisions

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=Text=
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{{#Wiki_filter:1US.NRC '-nn"ernai"-  
{{#Wiki_filter:1US.NRC ~peop pmoicixi;        ~ mmiI ad dtr~i~
)pmoicixi;
                            '-nn"ernai"-                 )
~peop ad dtr~i~ ~ mmiI Oconee Flood Protection and the Jocassee Dam Hazard Commission Assistants brief August 12, 2008 10/3/2012 ,,Official U nly -Sens' e mai m 'n 1 D wo  
Oconee Flood Protection and the Jocassee Dam Hazard Commission Assistants brief August 12, 2008 10/3/2012                     ,,Official U nly - Sens' e       1 mai m'n D wo
/ 2U.S.NRC I o,-a Pmkig htpk : at brnon~et Overview , Objective-Provide background information for issue.-Attain senior management alignment on issuance of a request for information per 10 CFR 50.54(f).Alignments meetings held within NRR (7/28) and between NRR, RII, OE and OGC (8/1) for path forward on letter., Success-Understanding of the regulatory and safety issues.-Confirmation of the path forward to resolve issue.10/3/2012 Official e ly -Sen ive 2 ternalin ma n (iUS.NRC Prdm5 Ptoyk ad GdwFriromwaes\In'trral Infor e The oo cenario Rupture of Jocassee Dam I Jocassee NioNlrnois toe .385-ft Mee away__ Nine Times ark " ' o" Six Mile 1d PickenaC a l 10/3/2012 3  
 
ýUOS.NRC fteain Pkp t.md the Earimmmi: JOciae Inem __ o tiion Jo cwassee uam Aerial 1013/2012 4  
/ 2U.S.NRC                             I         o,-a Pmkig htpk : at brnon~et Overview
~US.NRC~MrD1TO"I AUrol f Wc'j Mr, I I ~ChIPepcAtirmnI 5  
  , Objective
~US.NRC 0IDSTi~QI ftN WVCL OM SMUNLM Pr*cdwZPoap&
      -     Provide background information for issue.
W dw £mvntrnume
      -     Attain senior management alignment on issuance of a request for information per 10 CFR 50.54(f).
,' , I Use lin\ ensitie Thet talF nfoor arrier The SSF Flood Barriers If'"'-'4" 10/3/2012 6 (USSRC PIutiqD op an WA~ Er.4rme Key Insights from Reactor Oversight Process , Staff discovered that the Jocassee dam failure issue had not been adequately resolved., Duke Hydro/FERC Inundation Study completed in early 1990s. Estimated flood heights up to 16.8 ft above SSF grade level.* Floods in excess of 5 ft lead to three-unit core damage event., Staff identified an under-estimate in licensee's dam failure frequency.
Alignments meetings held within NRR (7/28) and between NRR, RII, OE and OGC (8/1) for path forward on letter.
10/3/2012 fia y Sensiivq7 Inerna t  
  , Success
-~U.S.NRC (1WIU~VI Issuance 50.54() Letter 50.54 letter is best regulatory approach to initiate resolution.
      - Understanding of the regulatory and safety issues.
Goal to issue letter by August 8.Letter seeks information to assure protection of public and elevates NRC's regulatory and safety concerns.* Letter states that Jocassee Dam Failure Inundation Study indicates flood heights up to 16.8 feet above SSF grade NRR Director and Region Il Administrator to have joint call with Duke senior management when letter is issued.Brief Commissioner Assistants prior to letter issuance.10/312012 icial Us My -Se 'tive 8 Internal In rm on I$yUSNRC PrcmPeopl aid 11w EavirmwNgt Actions Concurrent with 50.54(f) Letter* Backfit evaluation:
      - Confirmation of the path forward to resolve issue.
external flooding within licensing basis, Licensee did not address Jocassee dam failure.Cost-benefit estimate of $3 million in modifications.
10/3/2012                       Official e ly   - Sen ive               2 ternalin ma n
Modifications on the order of $13 million justified, 10/3/2012 9  
 
~U.STINRU  
                                              **              Infor es\In'trral e
=%W%'lEDti Eo l Actions Concurrent with 50.54() Letter (continued)
(iUS.NRC       ad GdwFriromwa Prdm5 Ptoyk The oo cenario Rupture of Jocassee Dam I               *Lake            Jocassee NioNlrnois toe                       .385-ft Mee away oNine Times
__
ark   "     '
                                        "         Six Mile 1d Pickena
                                .,*                      Ca l 10/3/2012                                                                     3
 
JOciae    nly-aSe*ive
ýUOS.NRC                                 Inem
__    o tiion t
fteain Pkp. mdthe Earimmmi:
Jo cwassee uam Aerial 1013/2012                                               4
 
~US.NRC
    ~MrD1TO"I AUrolf Wc'jMr, I I ~ChIPepcAtirmnI 5
 
                                  ,',  IUse lin\ ensitie
~US.NRC                           Thet talF nfoor arrier The SSF Flood Barriers 0IDSTi~QI ftNWVCL OM SMUNLM Pr*cdwZPoap&
Wdw £mvntrnume If'
                                              "'-'4" 10/3/2012                                             6
 
(USSRC PIutiqD op an WA~Er.4rme Key Insights from Reactor Oversight Process
, Staff discovered that the Jocassee dam failure issue had not been adequately resolved.
, Duke Hydro/FERC Inundation Study completed inearly 1990s. Estimated flood heights up to 16.8 ft above SSF grade level.
* Floods inexcess of 5ft lead to three-unit core damage event.
, Staff identified an under-estimate inlicensee's dam failure frequency.
10/3/2012               fia       y Sensiivq7 Inerna t
 
-~U.S.NRC             (1WIU~VI Issuance 50.54() Letter 50.54 letter isbest regulatory approach to initiate resolution.
Goal to issue letter by August 8.
Letter seeks information to assure protection of public and elevates NRC's regulatory and safety concerns.
* Letter states that Jocassee Dam Failure Inundation Study indicates flood heights up to 16.8 feet above SSF grade NRR Director and Region IlAdministrator to have joint call with Duke senior management when letter isissued.
Brief Commissioner Assistants prior to letter issuance.
10/312012                 icial Us My -Se 'tive             8 Internal In rm on
 
I$yUSNRC EavirmwNgt aid 11w PrcmPeopl Actions Concurrent with 50.54(f) Letter
* Backfit evaluation: external flooding within licensing basis, Licensee did not address Jocassee dam failure.
Cost-benefit estimate of $3million in modifications. Modifications on the order of $13 million justified, 10/3/2012                                         9
 
~U.STINRU=%W%
    'lEDti Eo l EthED.r.*
Actions Concurrent with 50.54() Letter (continued)
Generic issue preliminary assessment completed.
Generic issue preliminary assessment completed.
-Twenty five sites have a dependency on dam performance.
          - Twenty five sites have adependency on dam performance. Eight sites (including Oconee) have dams up river of the site.
Eight sites (including Oconee) have dams up river of the site.-Draft Information Notice has been written., Communication plan developed for Oconee actions and generic implications.
          - Draft Information Notice has been written.
Plan covers internal stakeholders only because information concerning issue is sensitive.
  , Communication plan developed for Oconee actions and generic implications. Plan covers internal stakeholders only because information concerning issue issensitive.
Justification for continued interim operations of Oconee in progress.10/3/2012 0 i Use y Sensiti e 10 Interna Inform ?io m  
Justification for continued interim operations of Oconee inprogress.
' icial Use y -USRC al Inforom 10 cr~ng hople adAtA E~rn-miled Followoup Actions After Issuance of 50.54() Letter , Prepare a draft Safety Order to direct Oconee plant modifications and modify Oconee license.* NRC senior management to call Duke senior management when letter is issued.* Evaluate licensee's response to letter., Determine if Safety Order is the appropriate regulatory vehicle.10/3/2012 11}}
10/3/2012                       0 i Use       y Sensiti e           10 Interna Inform ?io   m
 
          '                   icial Use     y- ,ensiti*-
USRC                                     al Inforom 10 hople adAtAE~rn-miled cr~ng Followoup Actions After Issuance of 50.54() Letter
, Prepare a draft Safety Order to direct Oconee plant modifications and modify Oconee license.
* NRC senior management to call Duke senior management when letter isissued.
* Evaluate licensee's response to letter.
, Determine ifSafety Order isthe appropriate regulatory vehicle.
10/3/2012                                                 11}}

Revision as of 08:44, 4 November 2019

Briefing Slides for Commission Assistants Brief on Oconee Flood Protection and the Jocassee Dam Hazard
ML14058A025
Person / Time
Site: Oconee  Duke Energy icon.png
Issue date: 08/12/2008
From:
Office of Nuclear Reactor Regulation
To:
Shared Package
ML14055A421 List: ... further results
References
FOIA/PA-2012-0325
Download: ML14058A025 (11)
v • d • e


Text

1US.NRC ~peop pmoicixi; ~ mmiI ad dtr~i~

'-nn"ernai"- )

Oconee Flood Protection and the Jocassee Dam Hazard Commission Assistants brief August 12, 2008 10/3/2012 ,,Official U nly - Sens' e 1 mai m'n D wo

/ 2U.S.NRC I o,-a Pmkig htpk : at brnon~et Overview

, Objective

- Provide background information for issue.

- Attain senior management alignment on issuance of a request for information per 10 CFR 50.54(f).

Alignments meetings held within NRR (7/28) and between NRR, RII, OE and OGC (8/1) for path forward on letter.

, Success

- Understanding of the regulatory and safety issues.

- Confirmation of the path forward to resolve issue.

10/3/2012 Official e ly - Sen ive 2 ternalin ma n

    • Infor es\In'trral e

(iUS.NRC ad GdwFriromwa Prdm5 Ptoyk The oo cenario Rupture of Jocassee Dam I *Lake Jocassee NioNlrnois toe .385-ft Mee away oNine Times

__

ark " '

" Six Mile 1d Pickena

.,* Ca l 10/3/2012 3

JOciae nly-aSe*ive

ýUOS.NRC Inem

__ o tiion t

fteain Pkp. mdthe Earimmmi:

Jo cwassee uam Aerial 1013/2012 4

~US.NRC

~MrD1TO"I AUrolf Wc'jMr, I I ~ChIPepcAtirmnI 5

,', IUse lin\ ensitie

~US.NRC Thet talF nfoor arrier The SSF Flood Barriers 0IDSTi~QI ftNWVCL OM SMUNLM Pr*cdwZPoap&

Wdw £mvntrnume If'

"'-'4" 10/3/2012 6

(USSRC PIutiqD op an WA~Er.4rme Key Insights from Reactor Oversight Process

, Staff discovered that the Jocassee dam failure issue had not been adequately resolved.

, Duke Hydro/FERC Inundation Study completed inearly 1990s. Estimated flood heights up to 16.8 ft above SSF grade level.

  • Floods inexcess of 5ft lead to three-unit core damage event.

, Staff identified an under-estimate inlicensee's dam failure frequency.

10/3/2012 fia y Sensiivq7 Inerna t

-~U.S.NRC (1WIU~VI Issuance 50.54() Letter 50.54 letter isbest regulatory approach to initiate resolution.

Goal to issue letter by August 8.

Letter seeks information to assure protection of public and elevates NRC's regulatory and safety concerns.

  • Letter states that Jocassee Dam Failure Inundation Study indicates flood heights up to 16.8 feet above SSF grade NRR Director and Region IlAdministrator to have joint call with Duke senior management when letter isissued.

Brief Commissioner Assistants prior to letter issuance.

10/312012 icial Us My -Se 'tive 8 Internal In rm on

I$yUSNRC EavirmwNgt aid 11w PrcmPeopl Actions Concurrent with 50.54(f) Letter

  • Backfit evaluation: external flooding within licensing basis, Licensee did not address Jocassee dam failure.

Cost-benefit estimate of $3million in modifications. Modifications on the order of $13 million justified, 10/3/2012 9

~U.STINRU=%W%

'lEDti Eo l EthED.r.*

Actions Concurrent with 50.54() Letter (continued)

Generic issue preliminary assessment completed.

- Twenty five sites have adependency on dam performance. Eight sites (including Oconee) have dams up river of the site.

- Draft Information Notice has been written.

, Communication plan developed for Oconee actions and generic implications. Plan covers internal stakeholders only because information concerning issue issensitive.

Justification for continued interim operations of Oconee inprogress.

10/3/2012 0 i Use y Sensiti e 10 Interna Inform ?io m

' icial Use y- ,ensiti*-

USRC al Inforom 10 hople adAtAE~rn-miled cr~ng Followoup Actions After Issuance of 50.54() Letter

, Prepare a draft Safety Order to direct Oconee plant modifications and modify Oconee license.

  • NRC senior management to call Duke senior management when letter isissued.
  • Evaluate licensee's response to letter.

, Determine ifSafety Order isthe appropriate regulatory vehicle.

10/3/2012 11

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