Full report PDF is here:
http://pbadupws.nrc.gov/docs/ML1118/ML111861807.pdf
The interesting part, to me at least, is from pp. 32-57. A couple details:
The report suggests uprating the station black out (SBO) definition to include not only loss of external and internal AC power, but also battery and UPS-based DC emergency power.
The NRC suggest uprating all existing and new plants to 8 hours of core cooling during SBO, with minimal plant/people interaction, followed by 72hr of additional mitigation using staged on-site equipment. It also requires dealing with SBO in these circumstances without necessarily retaining integrity of the primary coolant loop. The 8 hour demand is likely going to require raised, waterproofed, and hardened local AC generation capacity coupled with similarly robust storage of local generator fuel and cooling circuit liquids.
The additional equipment for the 72Hr time frame will probably take the form of bunkered onsite pumping, generation, and metrology.
---
The majority of the report is targeted specifically at GE BWR Mark I and II reactors, with some extension to Mark III reactors in the section regarding hydrogen suppression.
New reactor designs, such at the Westinghouse AP1000 whose construction has started here in Georgia, should need minimal changes, if any, to meet the new regulatory suggestions.
http://pbadupws.nrc.gov/docs/ML1118/ML111861807.pdf
The interesting part, to me at least, is from pp. 32-57. A couple details:
The report suggests uprating the station black out (SBO) definition to include not only loss of external and internal AC power, but also battery and UPS-based DC emergency power.
The NRC suggest uprating all existing and new plants to 8 hours of core cooling during SBO, with minimal plant/people interaction, followed by 72hr of additional mitigation using staged on-site equipment. It also requires dealing with SBO in these circumstances without necessarily retaining integrity of the primary coolant loop. The 8 hour demand is likely going to require raised, waterproofed, and hardened local AC generation capacity coupled with similarly robust storage of local generator fuel and cooling circuit liquids.
The additional equipment for the 72Hr time frame will probably take the form of bunkered onsite pumping, generation, and metrology.
---
The majority of the report is targeted specifically at GE BWR Mark I and II reactors, with some extension to Mark III reactors in the section regarding hydrogen suppression.
New reactor designs, such at the Westinghouse AP1000 whose construction has started here in Georgia, should need minimal changes, if any, to meet the new regulatory suggestions.