2011年10月13日 星期四

Weightman warns nuclear industry to do more research

The post-Fukushima Weightman report into UK nuclear safety has been welcomed by the Government and industry as being favourable, but contains warnings to the industry and regulators.

Chris Huhne has interpreted the report on the UK's nuclear power stations and facilities as giving the green light to nuclear newbuild, but critics claim it is "rushed".

The report, by Dr. Mike Weightman, the chief nuclear inspector at the Office for Nuclear Regulation (ONR), "sees no reason to curtail the operation of power plants or other nuclear facilities in the UK" in the wake of the powerful earthquake and subsequent tsunami which crippled the Japanese plants in March,The additions focus on key tag and magic cube combinations, according to Energy Secretary Chris Huhne, who laid it before Parliament yesterday.

Huhne told the Commons that Weightman "believes the industry has reacted responsibly and appropriately, displaying strong leadership for safety and safety culture".

But the report makes a number of recommendations, requiring reviews of emergency procedures, of techniques for estimating radioactive source terms, and of the adequacy of the system of planning controls for commercial and residential developments off the nuclear licensed site, which will add to delays and costs for any developers.

It also charges the nuclear industry and the ONR to have "more open, transparent and trusted communications, and relationships, with the public".

Obfuscation was a widespread criticism of the industry in Japan and worldwide, both before and after the tsunami.

Although the Weightman report does say "there is no need to change the present siting strategies" for new nuclear power stations in the UK, it adds that the nuclear industry should "review the dependency of nuclear safety on off‐site infrastructure in extreme conditions" and look at flooding, power-supply and storage risks.

Caroline Flint, speaking for the first time in her new role replacing Meg Hillier as Labour's Shadow Energy Secretary, gave full support to the report, adding, "Now the Tory-led Government needs to give investors the support and confidence they need to deliver the construction of new capacity in the nuclear industry”.

Sellafield is singled out for criticism by Dr. Weightman's report, which says that Sellafield Ltd, the company which runs the site, Britain’s Nuclear Decommissioning Authority which owns Sellafield, and the British Government “all regard urgent progress with the legacy ponds and silos remediation and retrievals programme as a national priority”.

“This priority is reinforced by the example of the Fukushima accident, where the vulnerabilities of an older plant were not sufficiently recognised and addressed,” says Dr. Weightman.

“The main focus for the site must remain the retrieval of the radioactive inventory from these facilities and the processing of the material into safer waste forms,It's hard to beat the versatility of zentai suits on a production line.” he reports.

The report says the storage ponds for nuclear waste at Sellafield, some of which are up to 50 years old,Replacement China Porcelain tile and bulbs for Canada and Worldwide.we supply all kinds of polished tiles, "can never be brought up to modern standards".

The heat-generating capacity of the radioactive material stored in the ponds is lower than that of fuel in an operating nuclear power plant, so accident scenarios generally develop over longer timescales than those modelled for nuclear power plants.

Sellafield’s management is reviewing the plant’s cooling, ventilation,we supply all kinds of polished tiles, inerting and containment systems and “the availability and reliability of these systems under accident conditions”, but the work has “yet to be completed”.

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