0POP03-ZG-0008 Power Operations

Question 1

• 0POP03-ZG-0008 Power Operations*
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If the operator changes feedwater flow, how long must he wait to raise Rx Power using U1118?

Answer 1

1 hour

Question 2

• 0POP03-ZG-0008 Power Operations*
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With regards to the controlling Main Turbine Governor valve (normally GV #4), when must power ascension to 100% RTP be halted?

Answer 2

60% Open

If limited only by GV position, next step allows you to continue to raise power to 100% GV open.

Question 3

• 0POP03-ZG-0008 Power Operations*
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When coastdown operations are in progress, what parameters should be maintained?

Answer 3

T_avg within ± 1.5 ˚F of Program T_avg

AFD Oscillations ≤ 1.0% peak to peak

Control Bank D 240 - 250 steps

Question 4

• 0POP03-ZG-0008 Power Operations*
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Who must be notified when the MG VR is placed in Manual?

Answer 4

STP Coordinator

Transmission and Distribution Service Provider (TDSP)

Notify within 30 minutes with expected duration (Use 72 hr is time is unknown)

Note:
Must also notify if there is a change in the reactive capability of the MG.

Question 5

• 0POP03-ZG-0008 Power Operations*
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During coastdown operations, what is the administrative limit for the + AFD Limit?

Answer 5

0.5% < Tech spec limit

AFD will become 0.6% more positive for every 1% of power reduction. (Assumes no rod motion)

Question 6

• 0POP03-ZG-0008 Power Operations*
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What is the target RTP for Units 1 and 2?

Answer 6

• *3852 MWt**
• 2 hr average ≤ 3853 MWt*

Question 7

• 0POP03-ZG-0008 Power Operations*
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What are some ways to lower secondary plant efficiency to give the main turbine controlling GV some bite?

Answer 7

HP GVs for SGFPTs

HP Main Turbine / MSR crossunder drains

Blowdown Flash Tank Vent

FW-MOV-108 FW Heater 11A/B Bypass Isolation MOV

Question 8

• 0POP03-ZG-0008 Power Operations*
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During coastdown operations, how long should the operators wait between power reductions?

Answer 8

12 hrs

Xenon concerns

Question 9

• 0POP03-ZG-0008 Power Operations*
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If RCS boron lowers to < 200 ppm, how is the RCS then diluted further?

Answer 9

BTRS

Question 10

• 0POP03-ZG-0008 Power Operations*
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When should coastdown operations begin?

Answer 10

RCS Boron 5 ppm
OR
Deemed necessary by Operations Plant Manager

Question 11

• 0POP03-ZG-0008 Power Operations*
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When reducing power, when can the MG placed in IMP IN?

Answer 11

98% RTP

Question 12

• 0POP03-ZG-0008 Power Operations*
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What should the T_avg band be maintained at during steady state and transient conditions?

Answer 12

• Steady State:*
• *± 0.5 ˚F of Program T_avg**
• Transient Conditions:*
• *± 1.5 ˚F of Program T_avg**

Auctioneered High T_avg should be used as the controlling T_avg channel.