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This report addresses a concern with the c … This report addresses a concern with the capability to field flash the diesel generator after the diesel engine has started in response to a fire in the Control Room. Step C9 in procedure OFN RP-017 opens NB0212 to drop power to NB02 and force an automatic start of the 'B' Train emergency diesel engine. Step C10 states to verify that the diesel engine is running and provides an RNO action to start the diesel if it is not running.</br>Step C10.d in OFN RP-017 has the operator check NB02 voltage on breaker NB0201 NORMAL. There is no RNO action if the voltage is not normal.</br>A fire in control room panel RL015 has the potential to cause a loss of diesel generator field flashing. For example, a short to ground on conductor 51 in cable 14KJK03AH with a simultaneous short to ground on conductor N1 in cable 14NEB11AA could blow the fuse(s) associated with the speed control relays (LSR and HSR). Loss of power to these relays will prevent field flashing, which will prevent voltage generation from the diesel generator, even though the diesel engine may be running.</br>Step C10.b in OFN RP-017 has the operator place the master transfer switch (KJHS0109) in LOC/MAN. Based on drawing E-13KJ03A, this action will isolate the control room start circuit by opening the contact between G7 and H7, and effectively isolate the short circuit potential. However, the fuse may have already blown before this action is taken. The circuit is not provided with redundant fusing, so it may be necessary to replace one or both fuses (FU5 and FU6) in panel KJ122 to re-establish power to the speed relays.</br>Wolf Creek has implemented the following compensatory measures:</br>Staged 4 spare fuses in the emergency locker in the B Train Diesel Generator Room.</br>Revised OFN RP-017, Control Room Evacuation.</br>Continued hourly fire watch in the control room (established due to another concern). </br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
00:30:00, 2 December 2005 +
42,182 +
19:34:00, 1 December 2005 +
00:30:00, 2 December 2005 +
This report addresses a concern with the c … This report addresses a concern with the capability to field flash the diesel generator after the diesel engine has started in response to a fire in the Control Room. Step C9 in procedure OFN RP-017 opens NB0212 to drop power to NB02 and force an automatic start of the 'B' Train emergency diesel engine. Step C10 states to verify that the diesel engine is running and provides an RNO action to start the diesel if it is not running.</br>Step C10.d in OFN RP-017 has the operator check NB02 voltage on breaker NB0201 NORMAL. There is no RNO action if the voltage is not normal.</br>A fire in control room panel RL015 has the potential to cause a loss of diesel generator field flashing. For example, a short to ground on conductor 51 in cable 14KJK03AH with a simultaneous short to ground on conductor N1 in cable 14NEB11AA could blow the fuse(s) associated with the speed control relays (LSR and HSR). Loss of power to these relays will prevent field flashing, which will prevent voltage generation from the diesel generator, even though the diesel engine may be running.</br>Step C10.b in OFN RP-017 has the operator place the master transfer switch (KJHS0109) in LOC/MAN. Based on drawing E-13KJ03A, this action will isolate the control room start circuit by opening the contact between G7 and H7, and effectively isolate the short circuit potential. However, the fuse may have already blown before this action is taken. The circuit is not provided with redundant fusing, so it may be necessary to replace one or both fuses (FU5 and FU6) in panel KJ122 to re-establish power to the speed relays.</br>Wolf Creek has implemented the following compensatory measures:</br>Staged 4 spare fuses in the emergency locker in the B Train Diesel Generator Room.</br>Revised OFN RP-017, Control Room Evacuation.</br>Continued hourly fire watch in the control room (established due to another concern). </br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
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100 +
00:00:00, 1 December 2005 +
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22:39:46, 24 September 2017 +
19:34:00, 1 December 2005 +
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false +
-0.205 d (-4.93 hours, -0.0293 weeks, -0.00675 months) +
00:30:00, 2 December 2005 +
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