February 22, 2013 – 10:48 pm |

A frequently asked question is whether nuclear decommissioning has reached technological maturity. A generally accepted definition of technological maturity is given as:

“A mature technology is a technology that has been in use for long enough that most of its initial faults and inherent problems have been removed or reduced by further development…One of the key indicators of a mature technology is the ease of use for both non-experts and professionals. Another indicator is a reduction in the rate of new breakthrough advances related to it—whereas inventions related to a (popular) immature technology are usually rapid and diverse, and may change the whole use paradigm—advances to a mature technology are usually incremental improvements only.”

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TECHNOLOGICAL MATURITY AND R&D PROGRAMS

February 22, 2013 – 10:48 pm |

A frequently asked question is whether nuclear decommissioning has reached technological maturity. A generally accepted definition of technological maturity is given as:

“A mature technology is a technology that has been in use for long enough that most of its initial faults and inherent problems have been removed or reduced by further development…One of the key indicators of a mature technology is the ease of use for both non-experts and professionals. Another indicator is a reduction in the rate of new breakthrough advances related to it—whereas inventions related to a (popular) immature technology are usually rapid and diverse, and may change the whole use paradigm—advances to a mature technology are usually incremental improvements only.”

REMOVING HIGH-RISK COMPONENTS FROM K-25 DEMOLITION CONTINUES

January 20, 2013 – 10:43 pm |
An aerial photo of the entire K-25 footprint. The Tc-99 area, where the NaF traps were located, is seen in the foreground. The north end demolition work is shown in the background.

In a complex task made more complicated by building conditions, historical restraints, and the fact that it was just plain hot, URS | CH2M Oak Ridge (UCOR) has safely removed the highest threat remaining at the mammoth K-25 building at the East Tennessee Technology Park (ETTP).

PERSPECTIVES ON FUKUSHIMA

October 23, 2012 – 11:55 pm |

It is easy to come in to a situation like this with a judging eye. It is more difficult to take a step back, realize our limitations, and refocus with empathetic eyes.

MODIFYING REMOTE TECHNOLOGY FOR MAGNOX STORAGE POND

August 24, 2012 – 12:06 am |
NDR---AUGUST-2012---COVER-STORY-MAGNOX-POND-FEATURED

There are many decommissioning challenges remaining across the site at Sellafield where the use of remote technology is likely to be beneficial or even fundamental to successful delivery due to access constraints largely relating to radiological dose.

DESTROYING ONE OF EUROPE’S MOST HAZARDOUS NUCLEAR LEGACIES

July 12, 2012 – 12:00 pm |
DESTROYING ONE OF EUROPE'S MOST HAZARDOUS NUCLEAR LEGACIES - headline

Fifty-seven tonnes of highly-contaminated liquid metal from fast reactor research tested the minds of engineers and scientists in the UK for two decades. Now, after an operation that took five years to complete, the team working for a consortium of Babcock International, CH2MHILL and URS has completed arguably the biggest hazard reduction in the UK decommissioning sector to date.

CLEAN-UP CHALLENGES IN OAK RIDGE

May 18, 2012 – 9:39 am |
TOUGH-CHALLENGES---MAY-2012---FEATURE

Tearing down the huge Manhattan Project facilities at the former K-25 site, now known as the East Tennessee Technology Park (ETTP) Heritage Center, and disposal of the hazardous and radioactive waste generated by their demolition pose some of the most complex environmental remediation challenges in the Department of Energy (DOE) complex.

SIZE REDUCING ZION UNIT-2 FOR WASTE DISPOSAL

April 9, 2012 – 11:47 pm |
ZION-NDR-APRIL-COVER-STORY

The Zion Nuclear Power Station consists of two commercial nuclear reactors and is currently being decommissioned. This plant consists of two nearly identical Westinghouse 1085 MWe Pressurized Water Reactors (PWR’s). Each reactor was online for approximately 22 years, after which they sat idle for 15 years.

PREPARING A DECOMMISSIONING PROJECT: Fundamentals, Objectives and Strategies

March 13, 2012 – 12:29 pm | 2 Comments
Preparing A Decommissioning Project

Decommissioning is the final phase in the life-cycle of a nuclear facility, and refers to the administrative and technical actions taken to remove, in part or in total, the facility from regulatory control. It is a complex process and requires activities such as decontamination, dismantling of equipment and demolition of structures, and management of the resulting radioactive wastes. The objective is to progressively reduce the radioactive inventory of the facility in a controlled manner, hence reducing the hazard while taking account of the health and safety of the operating personnel, the general public and preservation of the environment. The ultimate goal of decommissioning is unrestricted release or reuse of the site.

“STOP AND GO” IN NUCLEAR DECOMMISSIONING? Impacts & Risks of Stopped Projects

February 21, 2012 – 6:06 pm |
Ignalina NPP (Lithuania)

There are typically two basic decommissioning options for a nuclear facility for which the decision has been made not to return it to service, including: immediate dismantling; and long-term safe enclosure followed by dismantling. While onsite disposal (entombment) has received renewed attention over the last few years, it generally plays a minor role, limited to small installations and countries with scarce resources.

MOVING THE IMPOSSIBLE

January 16, 2012 – 12:00 pm | Comments Off
Due to the extremely high contamination and dose rates within Hot Cell #1, it could not be demolished in place like Hot Cells 2 and 3. An innovative plan was required to satisfy disposal requirements according to the decommissioning schedule and budget.

 
Designed in the late 1940s as the third in a line of reactor projects pursued by Argonne National Laboratories in collaboration with the Oak Ridge National Laboratory, and on behalf of the Atomic Energy Commission, …