Q62 — Fuel Handling Crane Interlocks
034 K4.02 (2.5)
Which ONE of the following describes an interlock on the Unit 2 Spent Fuel Handling Crane?
A. Overload Cutoff prevents crane travel with loads in excess of 2200 pounds over the fuel assemblies.
B. A high radiation signal on 2R32A, Fuel Handling Crane, Radiation Area monitor will lockout ALL crane motion.
C. Slack Cable prevents BOTH upward and downward motion of the hoist.
D. A high radiation signal on 2R9, New Fuel Storage Area, Radiation Area monitor prevents upward motion of the hoist.
▶ Show Answer & Explanation
✓ A. Correct. Overload Cutoff prevents crane travel with loads in excess of 2200 pounds over the fuel assemblies. This is a TRM surveillance requirement per TR Surveillance 4.9.7 and checked within 7 days IAW SC.MD-ST.CRN-0003 prior to crane use.
✗ B. Incorrect. 2R32A in alarm ONLY prevents upward motion of the hoist. Lowering the hoist is still enabled. Plausible in that the operator may believe that ALL crane motion is locked out.
✗ C. Incorrect. Slack Cable interlock ONLY prevents downward direction of the hoist. Plausible if the operator believes that this interlock prevents hoist motion in either direction.
✗ D. Incorrect. 2R5 or 2R9 Area radiation monitors only actuate the FHB Ventilation System and has no interlocks with the Fuel Handling crane operation. The operator may believe that these radiation monitors also interlock with the crane like the 2R32A.
Ref: NOS05REFUEL-13 | LO: NOS05REFUEL-13, Obj 5 — Outline the interlocks associated with the following Refueling System components: Fuel Handling Crane | Source: Bank — Salem | Cognitive: Fundamental/Memory
Connections
- Related systems: Refueling, Radiation Monitoring
- Related exam: 2022 NRC Written Exam