Search and Lock Procedure
01/09/01 GD

(Refer to figure 1)

  1. 30 minutes before the doors are to be locked, the ACS operator in the control announces over the PA system that all personnel must leave the Power room, interface room and cell. He shall announce the time remaining every five minutes. If the PA system is not available, the operator may enter the power room and cell and make the announcements with a portable megaphone.
  2. When the warning period has expired, searcher #1 walks through the power room, interface room, and cell and performs the following tasks:
    1. Kirk lock doors 3, 4, 6, 7, 11, 13, and 14 and takes the keys. Leave doors 1 and 9 (control room and cell) unlocked for now.
    2. Check that emergency exit doors 5, 8, and 10 are latched and unobstructed.
    3. Release any locked-down stop buttons using an emergency station release key.
    4. Make sure power room and cell limited access keys are in the entrance stations only.
    5. Escort remaining personnel out through door 1 (control room).
  3. Searcher #1 inserts the seven Kirk keys into the control room Kirk key interchange.
  4. At this point, power room, interface room, and cell status should be:
    1. All doors closed and latched.
    2. All Kirk locks locked except doors 1 and 9 (control room and cell).
    3. All emergency stations clear.
    4. All limited access keys in entrance stations.
    5. No known personnel inside.
  5. The ACS operator places the system into search and lock mode (excluding the diagnostic labs). The PLC will now monitor the search and lock procedure.
  6. Searcher #1 enters the power room through door #1 using a limited access key. He maintains contact with the ACS operator using a walkie-talkie.
  7. Searcher #1 conducts a search of the power room, interface room, and cell in the following manner:
    1. Proceed in a clockwise direction using the route detailed in figure 1.
    2. Depress each emergency stop button along the route. Each one should lock down. When all the stop buttons in an area (cell, interface or power room) are locked down, all emergency station chimes in the area will sound.
    3. Inspect all corridors, balconies, and spaces for personnel, cabinet doors ajar, and other hazards. Use the convex mirror to check behind the transformers in the power room. Check the top of the tokamak and far balcony near door 11.
    4. Recheck the security of emergency exit doors 5, 8, and 10.
    5. Use a limited access key when entering and exiting the cell through door 9. Failure to use the key will breach the cell and render the search invalid.
  8. Searcher #1 returns to the control room through door #1 using the limited access key.
  9. Searcher #2 enters the power room through door #1 using a limited access key. He maintains contact with the ACS operator using a walkie-talkie. He brings with him an emergency station release key.
  10. Searcher #2 conducts a search of the power room, interface room and cell in the following manner:
    1. Proceed in a counterclockwise direction using the route detailed in figure 1.
    2. Unlock and release each STOP button along the route. Note: If any STOP button is found released, the search is invalid (return to step 2).
    3. Insect all corridors, balconies, and spaces for personnel, cabinet doors ajar, and other hazards. Using the convex mirror to check behind the transformers in the power room. Check the top of the tokamak and far balcony from the balcony near door 11.
    4. Recheck the security of emergency exit doors 5, 8, and 10.
    5. Upon exiting the cell at door 9, Kirk lock door #1 using the limited access key.
  11. Searcher #2 returns to the control room through door #1 using the limited access key.
  12. Searcher #2 Kirk locks door #1 (control room to power room) and puts two additional keys into the Kirk Key interchange.
  13. The ACS operator requests SECURE mode from the ACS PC. The PC will allow SECURE mode only if it has monitored a valid search. If the system will not enter SECURE mode, return to step 2 and repeat the search procedure.
  14. The ACS operator toggles the door reset button on the ACCESS paragon display. At this point, power room equipment hard-wire interlocks are enabled through the ACS master relay.
  15. When the ACS PLC senses that the master relay is closed, it will signal READY to the C-MOD master control PLC.