ML052140185: Difference between revisions
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
StriderTol (talk | contribs) (StriderTol Bot change) |
||
| Line 17: | Line 17: | ||
{{#Wiki_filter:RIC 2005 Session T-H1 Power Uprates Power Uprates Amidst Chaos David Lochbaum Nuclear Safety Engineer Union of Concerned Scientists March 8, 2005 | {{#Wiki_filter:RIC 2005 Session T-H1 Power Uprates Power Uprates Amidst Chaos David Lochbaum Nuclear Safety Engineer Union of Concerned Scientists March 8, 2005 | ||
Nuclear Safety Trends NRC and industry often cite improving safety trends over past two decades, like: | Nuclear Safety Trends Slide 2 NRC and industry often cite improving safety trends over past two decades, like: | ||
Foundation for Nuclear Safety Trends Improving safety trends are a byproduct of prescriptive regulatory process and plethora of measures like worst-case calculations, ample margins for uncertainties, single-failure criterion, maximum credible accident design basis, etc. | Foundation for Nuclear Safety Trends Slide 3 Improving safety trends are a byproduct of prescriptive regulatory process and plethora of measures like worst-case calculations, ample margins for uncertainties, single-failure criterion, maximum credible accident design basis, etc. | ||
Challenge to Nuclear Safety Trends Extended power uprate is just one of many concurrent regulatory changes. Others: | Challenge to Nuclear Safety Trends Slide 4 Extended power uprate is just one of many concurrent regulatory changes. Others: | ||
o Reduced testing/inspection scopes & | o Reduced testing/inspection scopes & | ||
frequencies o Longer limiting condition of operation (LCO) durations o Best-estimate calculations | frequencies o Longer limiting condition of operation (LCO) durations o Best-estimate calculations | ||
Concern Power uprates are but one of many concurrent initiatives that reduce safety margins. | Concern Power uprates are but one of many concurrent initiatives that reduce safety margins. | ||
| Line 33: | Line 31: | ||
Reversal of Nuclear Safety Trends? | Reversal of Nuclear Safety Trends? | ||
NRC and industry often cite improving safety trends over past two decades, like: | Slide 6 NRC and industry often cite improving safety trends over past two decades, like:}} | ||
Latest revision as of 16:34, 15 January 2025
| ML052140185 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 03/08/2005 |
| From: | Lochbaum D Union of Concerned Scientists |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| Download: ML052140185 (6) | |
Text
RIC 2005 Session T-H1 Power Uprates Power Uprates Amidst Chaos David Lochbaum Nuclear Safety Engineer Union of Concerned Scientists March 8, 2005
Nuclear Safety Trends Slide 2 NRC and industry often cite improving safety trends over past two decades, like:
Foundation for Nuclear Safety Trends Slide 3 Improving safety trends are a byproduct of prescriptive regulatory process and plethora of measures like worst-case calculations, ample margins for uncertainties, single-failure criterion, maximum credible accident design basis, etc.
Challenge to Nuclear Safety Trends Slide 4 Extended power uprate is just one of many concurrent regulatory changes. Others:
o Reduced testing/inspection scopes &
frequencies o Longer limiting condition of operation (LCO) durations o Best-estimate calculations
Concern Power uprates are but one of many concurrent initiatives that reduce safety margins.
Justification for each initiative is based on improving trends achieved using a regulatory process that is being sacked wholesale.
Quad Citiess shaky experience demonstrates that we simply do not know enough to undertake so many concurrent margin reducing initiatives - so why are we doing it?
Slide 5
Reversal of Nuclear Safety Trends?
Slide 6 NRC and industry often cite improving safety trends over past two decades, like: