San Onofre Unit 2 Retainer Bars Could Cause Massive ? Leakage


In an accident like a main steam line break at San Onofre, the badly designed retainers bars in Unit 2 could actually make things much worse by causing more damage to any of the 9,727 already fatigued tubes in each of its steam generators which could lead to additional leakage of highly radioactive reactor core coolant and/or cause a nuclear incident or worse a nuclear accident like Fukushima!


Radioactive Leaks and ruptures can happen without notice:



Allegation/Violations

The NRC has decided in AIT follow-up report dated 11/09/2012, “Item 3. “(Closed) Unresolved Item 05000362/2012007-03, ‘Evaluation of Retainer Bars Vibration during the Original Design of the Replacement Steam Generators” as a non-cited violation in accordance with Section 2.3.2 of the NRC’s Enforcement Policy.”  However, as shown below, SCE/MHI’s failure to verify the adequacy of the retainer bar design as required by SCE/MHI’s procedures have resulted in plugging of several hundred tubes in the brand new replacement generators. This has resulted in these violations:

1. Failure to meet NRC Chairman Standards on Nuclear Safety by SCE,
2. Failure to meet Senator Boxer’s Committee on Environment and Public Works
(EPW) Standards on Nuclear Safety by SCE,
3. Failure to enforce SCE Edison Contract Document instructions to MHI by SCE,
4. Failure to meet SONGS Technical Specifications by SCE,
5. Failure to meet general design criteria (GDC) in Appendix A, “General Design
Criteria for Nuclear Power Plants,” to 10 CFR Part 50, “Domestic
Licensing of Production and Utilization Facilities GDC 14, “Reactor
Coolant Pressure Boundary” by SCE/MHI,
6. Failure to demonstrate that Unit 2 retainer bars will maintain tube bundle
geometry at 70% power due to fluid elastic instability during a main line
steam break (MSLB) design basis event, and
7. SCE/MHI took shortcuts by avoiding the 10 CFR 50.90 License Amendment
Process under the false pretense of “like for a like” replacement steam
generator.  SCE added 377 more tubes, increased the average length of the
heated tubes and changed the thermal-hydraulic operation of the RSGs without

proper safety analysis and inadequate 10CFR 50.59 Evaluation.

This intentional action to produce more thermal megawatts out of the

RSGs compromised safety at SONGS Unit 2 due to the failure of 90

percent through wall thickness of a tube by the inadequate design of the

r

etainer bar.


Recommended Actions:

NRC San Onofre Special Panel is requested to resolve the above listed Allegations and/or Violations within 30 days of receipt of this email and prior to granting SCE’s permission to do any restart “testing” of Unit 2. Answer all allegations factually, don’t just void them.
 
See Full Document:
Media Alert: San Onofre Retainer Bar Problems

Aging Nuke Plants On Fault Lines In Tsunami Hazard Zones = Fukushimas… Any Questions?
PLEASE Turn off a light for Fukushima USA / San Onofre

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San Onofre Legacy (SOL Part 1, 2 and 3)

The DAB Safety Team released three Media Alerts today!


Together they describe (in technical detail) the current situation at San Onofre, along with what SCE, their experts and other public nuclear watchdogs are now saying about all the NRC RESTART QUESTIONS they have been told to answer:


snip:
The following paper shows that the entire NRC Regulatory Process is underfunded, broken and needs additional funding, oversight and extensive overhaul to ensure public safety.
snip:
The presentation by SCE, Mitsubishi and other experts to the NRC was very disappointing and disturbing to 8.4 million Southern Californians.  The presentation did not address U.S. Sen. Barbara Boxer and Congressman Edward J. Markey’s concerns expressed on February 6, 2013 in her letter to NRC Chairman McFarlane, “Southern California Edison was aware of problems with replacement steam generators at its San Onofre nuclear power plant but chose not to make fixes.
snip:
The structural integrity of SONGS degraded retainer bar system to withstand combined loads that result from postulated accident conditions events has not been demonstrated.
Aging Nuke Plants On Fault Lines In Tsunami Hazard Zones = Fukushimas… Any Questions?
PLEASE Turn off a light for Fukushima USA / San Onofre

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Unsafe NRC Computer Model Requires Investigation

Snip from:

Press Release 13-01-22 ATHOS Validity Questioned, Qualifying Investigation Required

The validity of the ATHOS T/H computer model for San Onofre Unit 2 at Main Steam Line Break  conditions requires that the NRC Office of Nuclear …

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Unsafe NRC Computer Model Requires Investigation

Snip from:

Press Release 13-01-22 ATHOS Validity Questioned, Qualifying Investigation Required

The validity of the ATHOS T/H computer model for San Onofre Unit 2 at Main Steam Line Break  conditions requires that the NRC Office of Nuclear …

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NRC Violating Presidential Directive and the Public Trust

SCE’s PR Machine Is Capable Of Overcoming ALL Hurdles,

Except Good Science And Safety

Albert Einstein also described INSANITY as

Doing the same thing over and over again and expecting different results. 

The DAB Safe…

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NRC Violating Presidential Directive and the Public Trust

SCE’s PR Machine Is Capable Of Overcoming ALL Hurdles,

Except Good Science And Safety

Albert Einstein also described INSANITY as

Doing the same thing over and over again and expecting different results. 

The DAB Safe…

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SCE Violated Federal Reg.’s And the Public Trust

Nuclear Experts Agree, San Onofre’s Replacement Steam Generators Are Unsafe

Summation: Based upon our ongoing review of evaluations, engineering analyses, inspections, technical and operational assessment reports prepared by the NRC’s Augment…

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SCE Violated Federal Reg.’s And the Public Trust

Nuclear Experts Agree, San Onofre’s Replacement Steam Generators Are Unsafe

Summation: Based upon our ongoing review of evaluations, engineering analyses, inspections, technical and operational assessment reports prepared by the NRC’s Augment…

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TEN Unresolved Items, Requires NRR Investigate The NRC

The Unsatisfactory Status Of The NRC Region IV Augmented Inspection Team
Report Which Contains TEN Unresolved
Items, Requires Additional NRR Investigation
And Resolution.

The DAB Safety Team has transmitted the following to
the Chair…

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TEN Unresolved Items, Requires NRR Investigate The NRC

The Unsatisfactory Status Of The NRC Region IV Augmented Inspection Team
Report Which Contains TEN Unresolved
Items, Requires Additional NRR Investigation
And Resolution.

The DAB Safety Team has transmitted the following to
the Chair…

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NRC AIT Review Of San Onofre Requires An NRR Investigation

NRC AIT review of SCE 10CFR 50.59: The NRC AIT stated in its report, “Based on the updated final safety analysis report description of the original steam generators, the team determined that the steam generators major design changes were r…

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NRC AIT Review Of San Onofre Requires An NRR Investigation

NRC AIT review of SCE 10CFR 50.59: The NRC AIT stated in its report, “Based on the updated final safety analysis report description of the original steam generators, the team determined that the steam generators major design changes were r…

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San Onofre’s TTW Assessment Is NOT ACCEPTABLE

SCE Cannot Develop A New Tube-To-Tube (TTW) Operational Assessment ACCEPTABLE To The NRR, After Wasting Hundreds of Millions of Dollars

NRC Office of Nuclear Reactor Regulation asked in a letter dated December 26, 2012 to Edison the following questi…

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NRC Region IV AIT Team Report Requires Immediate NRR Investigation

Press Release + 13-01-02 Supplemental
To Our Press Release + 12-12-31

Condensed Version

NRC AIT Team review of SCE 10CFR
50.59: The NRC AIT Team stated in its report, “Based on the
updated final safety analysis report description of the origi…

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NRC Region IV AIT Team Report Requires Immediate NRR Investigation

Press Release + 13-01-02 Supplemental
To Our Press Release + 12-12-31

Condensed Version

NRC AIT Team review of SCE 10CFR
50.59: The NRC AIT Team stated in its report, “Based on the
updated final safety analysis report description of the origi…

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SCE’s News Years Resolution 2013: Decommission SONGS ASAP

NRR RAI Answers Will Prevent Any SCE Restart At San Onofre

The NRC Office of Nuclear Reactor Regulation has requested from Edison in a
letter dated December 26, 2012, the following additional information (RAI
#32): “Please …

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SCE’s News Years Resolution 2013: Decommission SONGS ASAP

NRR RAI Answers Will Prevent Any SCE Restart At San Onofre

The NRC Office of Nuclear Reactor Regulation has requested from Edison in a
letter dated December 26, 2012, the following additional information (RAI
#32): “Please …

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Thirty Alarms Demonstrates SONGS Is Unsafe

The 30 Un-Resolved Alarms Recorded by SONGS Vibration Monitoring System During 11 Months of Operation, Requires An Immediate NRR Safety Investigation

Three Questions affecting US reactor safety need to be answered ASAP, by the NRR:…

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Thirty Alarms Demonstrates SONGS Is Unsafe

The 30 Un-Resolved Alarms Recorded by SONGS Vibration Monitoring System During 11 Months of Operation, Requires An Immediate NRR Safety Investigation

Three Questions affecting US reactor safety need to be answered ASAP, by the NRR:…

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