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The subject of the Sizewell B Emergency Plans were presented to the Sizewell Stakeholders Group on June 5th by Andy Osman Suffolk County Councilor and Gavin Smith from the Office for Nuclear Regulation. The Plans were met with incredulity. The Emergency Evacuation Zone is to be 1 kilometre (0.6 of a mile), a reduction from the current 2.4 km. The 23 people in the zone are to be told to either shelter/ evacuate and are to be given potassium Iodate tablets on a yearly basis to keep at hand if there is an emergency.

This is after being told just a week or two ago that the area to be covered would be according to Post Codes which would include Leiston but exclude Theberton and Eastbridge, Thorpeness and several other small villages.

UPDATE 19/06:

TASC has received a long email from the Andy Osman from Suffolk County Council in which he said

"Regrettably a number of people at the SSG meeting helped to confuse the message that we were trying to get across with regards to changes to emergency plans. I have asked the SSG Chair if I can come back to a sub group, along with EDF, ONR, Public Health England and DECC, to continue the process of explaining in detail the changes."

The changes to the plan have been made because the risk area for reasonably foreseeable emergencies which was calculated for sizewell A when in operation was set at 2.4kms. The ONR announcement in April confirmed that the risk had now reduced at the A site, due to decommissioning, and the B power station risk is now the driver for considering urgent countermeasures. This risk now extends no further than 1km.

For anyone with the time and tenacity to plough through it, the Sizewell Off Site Emergency Plan is published on the Suffolk resilience website : SRF Sizewell Off Site Emergency Plan
It contains the following:

6. Planning Assumptions for Emergency Arrangements.
REPPIR requires that an Off Site Emergency Plan is prepared to provide detailed emergency arrangements to secure, so far as is reasonably practicable, the restriction of exposure to ionising radiation and the health and safety of persons who may be affected by such reasonably foreseeable emergencies. Such a plan is based upon emergency planning zones that cover the area that in the opinion of the Executive any member of the public is likely to be affected by such radiation emergencies, this is called the DEPZ. This plan uses a tiered approach based upon hazard assessments to guide where emergency arrangements should be planned and to what degree. The resultant planning assumptions are as follows:

6.1. Reasonably Foreseeable. The Sizewell B Power Station Report of Assessment indicates that radiation from a reasonably foreseeable accident may require countermeasures to protect the public to be applied with minimal warning as follows:
• Evacuation - out to 200m
• Shelter - out to 1km
• Stable Iodine - out to 1km.
• Food monitoring out to 35km.

[then later:]

6.2 Beyond Design Basis/Reasonable Worst Case. The HSE document Outline Emergency Planning for Licensed Nuclear Power Stations indicates that in a hypothetical extended release scenario, countermeasures to protect the public may need to be applied within 10-12 hours of an emergency.
• Extended Evacuation - out to 4km
• Extended Shelter - out to 15km (shelter and stable iodine are
implemented together)
• Extended Stable Iodine - out to 15km.
The Suffolk Resilience Forum has agreed to introduce an EEPZ out to 15km based upon the Sizewell B power station.
Countermeasures within the EEPZ will be pre-planned but not deployed and public within this area will be able to access information on planned arrangements
 

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