Site buildings and construction

Question 1

Safety category 1 buildings are designed for earthquake and other design basis events. These buildings are:

Answer 1

Containment, AB, fuel handling building, main steam tunnels, river screen house(portion housing ESW intake), sx cooling towers, deep well enclosure

Question 2

Unrestricted Area (10CFR20.1003)

Answer 2

• An area, access to which is neither limited nor controlled by the licensee

Question 3

Restricted Area (10CFR20.1003)

Answer 3

• An area, access to which is limited by the licensee for purposes of protection of individuals against undue risks from exposure to radiation and radioactive materials

Question 4

Exclusion Area (10CFR100.3)

Answer 4

• that area surrounding the reactor in which the reactor licensee has the authority to determine all activities, including exclusion or removal of personnel and property from the area.

Question 5

Exclusion area size basis? Dose….

Answer 5

10CFR100.11—An area of such size that an individual located at any point on its boundary for two hours immediately following onset of the postulated fission product release would not receive a total radiation dose to the whole body in excess of 25 rem or a total radiation dose in excess of 300 rem to the thyroid from iodine exposure.
10CFR50.67 (AST)—An individual located at any point on the boundary of the exclusion area for any 2-hour period following the onset of the postulated fission product release, would not receive a radiation dose in excess of 0.25 Sv (25 rem) total effective dose equivalent (TEDE).

Question 6

Exclusion area distance?

Answer 6

1460 feet from outer containment wall

Question 7

lpz design

Answer 7

10CFR100.11—A low population zone of such size that an individual located at any point on its outer boundary who is exposed to the radioactive cloud resulting from the postulated fission product release (during the entire period of its passage) would not receive a total radiation dose to the whole body if excess of 25 rem or a total radiation dose in excess of 300 rem to the thyroid from iodine exposure.

10CFR50.67 (AST)—An individual located at any point on the outer boundary of the low population zone, who is exposed to the radioactive cloud resulting from the postulated fission product release (during the entire period of its passage), would not receive a radiation dose in excess of 0.25 Sv (25 rem) total effective dose equivalent (TEDE).

Question 8

LPZ distance?

Answer 8

3.0 miles from midpoint between two reactors

Question 9

EPZ distance?

Answer 9

10 mile radius from between two reactors

Question 10

EPZ ingestion exposure pathway?

Answer 10

50 miles

Question 11

Makeup sources to MDCT

Answer 11

Normal- CW makeup
Backup/manual- deepwell pumps
Emergency- two diesel driven SX pumps

Question 12

Control room dose during DBA?

Answer 12

After DBA (LOCA),
   CR WB dose 
   for the duration 
   of the accident will
   not exceed 5 REM  
   or its equivalent 
   (This includes ingress 
    and egress as per the
    requirements of    
   10CFR50, Appendix A)