EMERGENCY PROCEDURE AND SAFETY ....................... contd.....

Q10. What action will you take if you notice large scale release of radioactive material or a major fire or

         explosion?

A.    Evacuation will be done and all should be assembled in Low block entrance hall. Follow the instruction

          of Shift In-Charge.

Q11. What are the equipments connects to emergency power?

A.     Priority I & II.

Q12. What is the purpose of battery lights provided in the plant?

A.      It is as exit lights in case of total power failure.

Q13. What is the frequency of testing emergency lights provided in the plant?

A.      Emergency lights are tested weekly on Tuesday.

Q14. What checks are made to clear the area for work after the power supply is restored?

A.    Air samples of area are taken to check the air activity; swabs are taken to check the loose

        Contamination in the area. Also the radiation field existing in that area is measured.

Q15. What is the interlock given between exhaust fan and supply fan? Why?

A.     Supply fan can be started only if exhaust fans are running. And if exhaust fan is tripped respective area

         fan also trips. The interlock is made to maintain the negative air pressure in the plant.

Q16. How the dampers of exhaust fan are kept open when compressed air is not available? What is the –ve 

        & +ve pressure?

  A    Dampers of exhaust fan can be operated pneumatically with the help of Parkinson Air compressor

         Otherwise manual operation is also possible.

-ve pressure +ve pressure:  It is the pressure which is less that atmospheric pressure. So that outside air can enter in plant but inside air should not release to outside for +ve pressure it is vice versa.

Q17.  What are the locations of emergency exits in the plant?

A.      1 No. at 1^st fl. Room no. 121, 2 nos. at 2^nd fl. Inactive lab & spectroscopy lab., 2 Nos. at 3^rd fl. Pu lab

          Annex & Pu re-conversion lab.

Q18.  What action is to be taken in case of extended total power failure?

A.      In case of extended total power failure, the high block should be declared “NO ENTRY” area. Also as

         Soon as adequate cooling is accomplished in the process condensers, the isolating valve should be

         Closed. And the entire flow diverted to the waste tank off gas condenser.

Q19. What is the action to be taken in case of small fire in the radioactive area?

A.     Use appropriate fire extinguisher to extinguish fire, inform to control room and make people alert in

         that area.

Q20. What care should be taken in an area to prevent fire?

A.    Do not smoke where inflammable materials are kept. Keep proper ventilations in such areas. Keep

         Knowledge of main switches of such areas to switch off electrical supply. Remove unwanted material

         which catch fire like papers, wooden materials etc. In particularly hazardous atmosphere, use flame

         Proof and fire proof equipments.

Q21. How the mops and cotton waste having hydrazine and acid should be handled to prevent fire?

A.     Mops and cotton waste having acid are to be sealed in container and to be disposed. Hydrazine mops