ML080590312

02/19-02/21/2008 Nrc/Doe Workshop Presentation: 80 Is the New 60! Lessons from the Past - Pierce

ML080590312
Person / Time
Site:	Vogtle
Issue date:	02/19/2008
From:	Pierce C Southern Nuclear Operating Co
To:	Office of Nuclear Regulatory Research
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ML080570419	List: ML080590283 ML080590312 ML080600456
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Download: ML080590312 (8)

Text

80 Is the New 60!

Lessons from the Past February 19, 2008 Charles Pierce Vogtle Deployment Licensing Manager Southern Nuclear

License Renewal - Past

• Focus was on predictable and stable process (60FR22462)

• License renewal fundamental principles were (60FR22464) -

- With the possible exception of the detrimental effects of aging on the functionality of certain plant systems, structures, and components in the period of extended operation and possibly a few other issues related to safety only during the extended operation, the regulatory process is adequate to ensure that the licensing basis of all currently operating plants provides and maintains an acceptable level of safety so that operation will not be inimical to public health and safety... (emphasis added)

- The plant-specific licensing basis must be maintained during the renewal term in the same manner and to the same extent as during the original licensing term

• Adequacy of the CLB originally evaluated by Surry and Monticello pilot studies of over 14,000 components and subsequently confirmed by the license renewal process of 80 reactors

License Renewal 1900s Environment

• Concern with Regulations

• Concern with Regulatory Environment

• Concern with overall benefit

License Renewal - Past

• Key Rulemaking Changes from 1990 to 1995

- Used aging effect vs. aging mechanism

- Used Required function vs. intended function

- Used current regulatory processes to monitor active functions (focus on use of existing programs)

- Focused on SSC aging rather than developing explicit list of subcomponents

- Evaluated a limited set of SSCs rather than entire plant (Tech Spec LCO, Short-lived components, hypothetical aging effect, etc)

- Eliminated definition of ARDUTLR

License Renewal The 1995 Rule

• The license renewal process consists of -

- Standard application material (10 CFR 54.17)

- Integrated Plant Assessment consisting of a methodology description of scoping and screening, identifying and listing of components, identifying of aging effects for those components, and a demonstration that aging management programs manage those aging effects (10 CFR 54.21(a))

- Calculations (TLAAs) & exemptions evaluation w/40 yr limitations (10 CFR 54.21(c))

- FSAR supplement describing programs (10 CFR 54.21(d))

- Supplement to environmental report (10 CFR 54.23, 10 CFR 51, Subpart A)

- Technical specifications changes or additions (10 CFR 54.22)

• The license renewal process end result is a renewed license with up to a 20 year extension. (54.31(b))

License Renewal Regulatory Environment Working Group Executives Commissioners NEI Senior Management NEI Working Group License Renewal Steering Committee NEI Senior Management NEI Staff License Renewal Project Directorate NEI License Renewal Task Force EPRI Life Cycle Management Owners Groups (WOG, BWROG, etc.)

Millions of Dollars Per 1000 MW Year Cost Benefit Improvements

Looking to 80!

• Aging is a continuous process

• No specific new aging phenomena was identified in an extended operating term of 60 years (60 FR 22464)

• Lessons learned from license renewal applicants continue to confirm this conclusion

• Ongoing operating experience has identified any aging effects that should have additional monitoring

• Evaluations for 80 years should be focused on validating this conclusion