ML21144A323

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ES-D-1
ML21144A323
Person / Time
Site: Clinton Constellation icon.png
Issue date: 04/13/2021
From: Gregory Roach
Operations Branch III
To:
NRC/RGN-III/DRS/OLB
Roach G
Shared Package
ML20136A301 List:
References
Download: ML21144A323 (3)
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Text

ILT 19-1 NRC Exam Scenario 2 Rev. 0 Appendix D Scenario Outline Form ES-D-1 Facility: Clinton Power Station Scenario No.: 2 Operating Test No.: 2021-301 Examiners: ____________________________ Operators: ____________________

Initial Conditions:

  • Mode 1 Rx Power at RTP.
  • Weather conditions are calm and clear.
  • MC Pump A (0MC01PA) is OOS for maintenance. Not expected back this shift.

Turnover:

  • On the previous shift, the Drywell was vented per CPS 3316.01 Containment Combustible Gas Control (HG) to support performance of CPS 9064.01 Drywell Post-LOCA Vacuum Breaker Verification Test.
  • First Priority - Perform CPS 9064.01 Drywell Post-LOCA Vacuum Breaker Verification Test.
  • Maintain power at RTP throughout the shift.

Critical Tasks:

  • [CT-2] Enters and executes EOP-3 Emergency RPV Depressurization within 15 minutes of 2 or more of the following areas exceeding max safe temperature values of EOP-8 Table T Area Temperature Limits:
  • Point 14 1TR-CM326 (Upper Recorder) - Aux Bldg Below MS Tunnel > 200°F
  • Point 18 1TR-CM326 (Upper Recorder) - Aux Bldg Steam Tunnel > 200°F
  • Point 15 or 16 1TR-CM327 (Lower Recorder) - Aux Bldg MSIV Room A or B > 200°F Event Malf. No. Event Type* Event No. Description 1 N/A N-BOP Drywell Vacuum Breaker Test I-BOP 2 YP_XMFTB_4102 (NEW) Spurious HPCS auto initiation TS-SRO SA01B1SA1CFO #1 SA Compressor trips with failure of Standby 3 C-BOP SA01B0SA1CFTC Compressor to Auto Start RRB_HORZ_MALF 21.7 MILS C-ATC 4 (NEW) RR Pump B high vibration RRB_VERT_MALF 21.1 MILS TS-SRO 5 N/A R-ATC Reduce power to <65% with Control Rods YP_XMFTB_4965 6 ROD0437TFIA4 C-ATC (NEW) RR Pump A trip ROD5221TFIA4 (NEW) Low Power ATWS / Unisolable MSL D Leak /

7 YPXMALSE_256 0.08% M-All Multiple area temps > Max Safe / EOP-3 Blowdown 8 YAFWHVFP_9 0% C-All (NEW) FRV 1FW004 Fails Shut

  • (N)ormal, (R)eactivity, (I)nstrument, (C)omponent, (M)ajor NEW - Not used on the previous two (2) NRC exams.

ILT 19-1 NRC Exam Scenario 2 Rev 0 Post OSV.docx Page 2 of 21

ILT 19-1 NRC Exam Scenario 3 Rev. 0 Appendix D Scenario Outline Form ES-D-1 Facility: Clinton Power Station Scenario No.: 3 Operating Test No.: 2021-301 Examiners: ____________________________ Operators: ____________________

Initial Conditions:

  • Mode 1 at ~10% power.
  • Thunderstorms are expected in the area within the next hour.
  • CY Pump B (0CY01PB) is OOS for maintenance. Not expected back this shift.

Turnover:

  • CPS 3002.01 Heatup and Pressurization is complete.
  • CPS 3004.01 Turbine Startup and Generator Synchronization is in progress. Section 5.0 Prerequisites are complete.

Steps 8.1.1 and 8.1.5 are in progress. Steps 8.1.2 - 8.1.4 are complete.

  • Priorities for the shift are as follows:
  • Continue with power ascension to 15% IAW Step 8.1.6 of CPS 3004.01. The RE has requested single rod, single notch rod motion.
  • After reaching 15% power, perform Turbine Roll IAW Step 8.1.8 of CPS 3004.01.

Critical Tasks:

  • [CT-1] PC-3.1, SCRAMs the reactor before suppression pool level lowers to less than 15 1.
  • [CT-2] PC-3.3, Enters EOP-3 prior to suppression pool level reaching 151 and performs an emergency depressurization. If the suppression pool level lowers to less than 151 after the announcement is made to enter EOP-3, but before the blowdown is initiated, then this critical task is considered to be met.

Event Malf. No. Event Type* Event No. Description (NEW) Secure RHR A Operation in Pool To Pool 1 N/A N-BOP Mode 2 NA R-ATC Raise power with rods to 15%

C-ATC 3 ROD4017TFIA5 Uncoupled Rod TS-SRO YP_XMFTB_4992 4 C-BOP (NEW) Trip of MSOP / ESOP fails to auto start A04_A28_S23=2 5 YFCUCTPW_1 C-ATC A Reactor Water Cleanup Filter Demin Trip A05_A02_A0204_1_TVM; I-BOP (NEW) RCIC failure to auto-isolate on an isolation 6

A05_A02_A09DS08_1 TS-SRO signal YPXMALSE_665 100%

YPXMALSE_666 100% Suppression Pool leak into the LPCS Room / RHR 7 A05_A02_A09S38_2=ON M-All A Pump Room / 1E21F001 LPCS Suppr Pool A05_A02_A16DS60_1=OFF Suction Valve fails to close A05_A02_A16DS61_1=OFF A05_A02_A13S60B_1 8 C-All Manual ADS Initiation Logic failure A05_A02_A13S62B_1

  • (N)ormal, (R)eactivity, (I)nstrument, (C)omponent, (M)ajor NEW - Not used on the previous two (2) NRC exams.

ILT 19-1 NRC Exam Scenario 3 Rev 0 Post OSV.docx Page 2 of 18

ILT 19-1 NRC Exam Scenario 4 Rev. 0 Appendix D Scenario Outline Form ES-D-1 Facility: Clinton Power Station Scenario No.: 4 Operating Test No.: 2021-301 Examiners: ____________________________ Operators: ____________________

Initial Conditions:

  • Mode 1 at 56% power.
  • Weather conditions are calm and clear.
  • MC Pump A (0MC01PA) is OOS for maintenance. Not expected back this shift.

Turnover:

  • Priorities for the shift are as follows:
  • First Priority - Continue performing HPCS Pump Operability IAW CPS 9051.01 HPCS Pump & HPCS Water Leg Pump Operability starting at step 8.2.7. An extra equipment operator is briefed, staged and ready to support the surveillance.
  • CPS 3005.01 is complete through Step 8.1.10.

LCOs in effect

  • ORM 2.5.2 Action 3.5.2 due to HPCS MOV TEST PREP switch being in TEST (entered at 0500 on the previous shift).

Critical Tasks:

  • [CT-1] TCA-10 BOP/ATC starts Standby Liquid Control Pumps to shutdown the reactor within 120 seconds of the time at which the ATWS trip setpoint is reached (RPV pressure of 1127 psig).
  • [CT-2] Inhibits ADS within 105 seconds of RPV level reaching Level 1 (-145.5 Wide Range).
  • [CT-3] Terminates and prevents injection from LPCS and LPCI before RPV level reaches Level 1 (-145.5 Wide Range) and pressure lowers below 472psig.
  • [CT-4] Initiates RCIC injection prior to RPV level reaching -160 (TAF).
  • [CT-5] If RPV level < TAF and no systems are injecting, initiate ADS per EOP-3 within 17.5 minutes of RPV level reaching -

160 (TAF).

Event Malf. No. Event Type* Event No. Description 1 N/A N-BOP (NEW) Perform CPS 9051.01 HPCS Pump Operability (NEW) Failure of HPCS Pump Discharge valve (1E22-2 YP_XMFTB_4104 C-BOP F301) 3 N/A R-ATC Raise Power with rods to 62%

C-ATC 4 ROD0429TFIA3 Rod drifts outward TS-SRO A04_A18_A02_4 Manual 5 I-BOP (NEW) EHC Temperature Controller Failure A04_A18_A02_7 Press A11_A05_S40_2 ON 6 (NEW) Loss of Control Power to Suppression Pool Dump A11_A02_07_4_TVM 2 TS-SRO A_11_A08_DS30_1 OFF Valve (1SM001A) 7 YAFWPPLB_16 C-ATC (NEW) TDRFP B High Bearing Temperature YP_XMFTB_5001/3/4 8 M-All (NEW) Inadvertent Group 1 Isolation / Partial ATWS GROUP_1_ISOL_MALF 9 YP_XMFTB_4094 C-All Trip of MDRFP / RCIC fails to auto start YP_XMFTP_4959

  • (N)ormal, (R)eactivity, (I)nstrument, (C)omponent, (M)ajor NEW - Not used on the previous two (2) NRC exams.

ILT 19-1 NRC Exam Scenario 4 Rev 0 Post OSV.docx Page 2 of 22

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