CH-5325 Leibstadt | Telefon +41(0)56 267 71 11 | www.kkl.chKernkraftwerk Leibstadt AG

Michael LichtinghagenChemistry and Radiation Protection Dept.Section ChemistryNPP Leibstadt (KKL)

BWR VIPMitigation Committee Meeting Strategy Group 2016San Antonio, Texas

Plant Experience ReportNPP Leibstadt

Folie | |Kernkraftwerk Leibstadt AG

Table of Contents

15.06.2016 EPRI BWR VIP Mitigation Committee Meeting 20162

1. NPP Leibstadt

2. Mitigation Performance - Cycle to Date

3. Water Chemistry Change + BRAC Dose Rate History KKL

4. OLNC modified

5. HWC/OLNC: Dosing of Platinum

6. Conclusion and discussion

BWR VIPMitigation Committee Meeting June 2016San Antonio, TX

Folie | |Kernkraftwerk Leibstadt AG

15.06.2016 EPRI BWR VIP Mitigation Committee Meeting 20163

1. NPP Leibstadt

• BWR 6• Power Rating (3600 MWth, 1220 MWeNet)• Commercial Dec-84• Forward pumped, Moisture Separator Reheaters• Titanium tubed Condenser• Cooling tower with 6 times cycled river water after lime softening• 5 Condensate F/D• 2 RWCU F/D• 1% RWCU

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15.06.2016 EPRI BWR VIP Mitigation Committee Meeting 20164

2. Mitigation Performance - Cycle to Date

Date (Month-Year) Instructions Current Cycle to Date Sep-15 Oct-15 Nov-15 Dec-15 Jan-16 Feb-16 Mar-16 Apr-16 May-16

Plant Enter in Column C KKLCycle Enter in Column C 32Beginning of Cycle Enter in Column C Sep-15Month of Cycle Calculated 9 1 2 3 4 5 6 7 8 9

Update Each Time

HWC Availability, %Enter in current month and Column C for Cycle to Date 96.5 66.0 88.7 96.11 100 100 100 100 100 100

ECP

Enter number of functioning ECP probes in current month. 1 1 1 1 1 1 1 1 1 1

Enter date of last benchmark test in current month. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a.Have any significant plant changes occurred since last benchmark test? Enter yes or no in current month. no no no no no no no no no no

Availability of 2 Secondary Parameters, %

Enter in current month and Column C for Cycle to Date 100.0 100 100 100 100 100 100 100 100 100

Secondary Parameters Used (List)

Enter in current month and Column C.

OLNC Application Plant Response; RW:

H2/O2 Conc; FW: H2/O2 Conc

OLNC Application Plant Response; RW:

H2/O2 Conc; FW: H2/O2 Conc

OLNC Application Plant Response; RW:

H2/O2 Conc; FW: H2/O2 Conc

OLNC Application Plant Response; RW:

H2/O2 Conc; FW: H2/O2 Conc

OLNC Application Plant Response; RW:

H2/O2 Conc; FW: H2/O2 Conc

OLNC Application Plant Response; RW:

H2/O2 Conc; FW: H2/O2 Conc

OLNC Application Plant Response; RW:

H2/O2 Conc; FW: H2/O2 Conc

OLNC Application Plant Response; RW:

H2/O2 Conc; FW: H2/O2 Conc

OLNC Application Plant Response; RW:

H2/O2 Conc; FW: H2/O2 Conc

OLNC Application Plant Response; RW:

H2/O2 Conc; FW: H2/O2 Conc

OLNC Catalyst Injected

If per vendor recommendation, enter yes in current month; otherwise enter no in current month. yes yes yes yes yes yes yes yes yes yes

OLNC Last Applied Enter in current month 01.05.2016 Jul 15 Jul 15 Jul 15 Dez 15 Dez 15 Feb 16 Feb 16 Apr 16 Mai 16

MMS Availability, %

Enter in current month and Column C for Cycle to Date. Enter n/a if measuring deposition on artifacts or if ECP measurement is not in MMS. 100.0 100 100 100 100 100 100 100 100 100

Mitigation PI Calculated green red red green green green green green green green

Comments Enter in current monthOil leakage on turbo

set H2 leakage Generator

Number of unplanned HWC Trips

Optional; enter in current month. Cycle to Date total is calculated. 0 0 0 0 0 0 0 0 0 0

Number of planned HWC Trips

Optional; enter in current month. Cycle to Date total is calculated. 2 1 1 0 0 0 0 0 0 0

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15.06.2016 EPRI BWR VIP Mitigation Committee Meeting 20165

3. Water Chemistry Change + BRAC Dose Rate HistoryKKL

Folie | |Kernkraftwerk Leibstadt AG

08.12.2015 Jährliche Besprechung Wasserstofffahrweise mit Edelmetalleinspeisung (HWC/OLNC) 2015 mit ENSI6

4. OLNC modified

Folie | |Kernkraftwerk Leibstadt AG

08.12.2015 Jährliche Besprechung Wasserstofffahrweise mit Edelmetalleinspeisung (HWC/OLNC) 2015 mit ENSI7

For cooling of the injected Pt-solution an additional demin. water module is installed

Control panel Demin. water module

Folie | |Kernkraftwerk Leibstadt AG

08.12.2015 Jährliche Besprechung Wasserstofffahrweise mit Edelmetalleinspeisung (HWC/OLNC) 2015 mit ENSI8

Demin. water module details

Key-equipment of the module: pump (7 piston) foto from FAT

Technical information:- Volume: approx. 3 l/min- Frequency: max. 40 Hz- Revolution pump: 1185

1/min.- Demin. water for cooling

pump and lubrication(advantage: no oil needed)

Folie | |Kernkraftwerk Leibstadt AG

08.12.2015 Jährliche Besprechung Wasserstofffahrweise mit Edelmetalleinspeisung (HWC/OLNC) 2015 mit ENSI9

principle of operation:

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15.06.2016 EPRI BWR VIP Mitigation Committee Meeting 201610

5. Platinum Applications Cycle 25 to 32

HWC/OLNC Applications

Start Stop Cycle Pt injected [g] Pt injection rate [g/h]Injection period [h]

Total Inj hours [h]

Total Pt injected per

cycle [g]

Total Pt injected per cycle [µg]

Total fuel surface for OLNC [cm2] (BET/06/0314

R008)

Surface load

[µg/cm2] Remark

16.09.2008 10:18 25 0.0 0Start Hydrogeninjection (BET/09/0418)

24.11.2008 07:55 06.12.2008 23:25 25 700.0 0.05, 0.5, 1.1, 2.1, 3.2, 2.2 303.5 303.5 700.0 7.00E+08 7.36E+07 9.5 Mainapplication23.11.2009 07:46 04.12.2009 12:40 26 585.4 0.55, 1.1, 1.7, 2.2 268.9 Mainapplication

29.03.2010 26 10.4 1.1, 2.2 6.0 1. Miniapplication05.05.2010 07.05.2010 26 50.0 2 25.0 299.9 645.8 6.46E+08 7.33E+07 8.8 2. Miniapplication08.12.2010 27 10.0 1.1, 2.2 5.0 1. Miniapplication recalibration ECP

16.01.2011 08:00 26.01.2011 03:12 27 354.0 0.5, 1.0, 1.5 240.0 245.0 364.0 3.64E+08 7.31E+07 5.0 Mainapplication04.12.2011 08:00 14.12.2011 22:53 28 384.2 1.5 256.13 Mainapplication12.03.2012 08:00 16.03.2012 13:00 28 150.0 1.5 99.5 1. Miniapplication21.05.2012 10:00 25.05.2012 08:00 28 150.0 1.5/1.6 94.0 449.6 684.2 6.84E+08 7.30E+07 9.4 2. Miniapplication14.01.2013 10:00 24.01.2013 11:00 29 350.0 1.5 und 1.31 238.0 Mainapplication09.04.2013 08:00 12.04.2013 11:15 29 112.0 1.5 75.0 1. Miniapplication21.05.2013 08:00 24.05.2013 16:00 29 120.0 1.5 80.0 2. Miniapplication02.07.2013 08:00 05.07.2013 14:52 29 118.0 1.5 79.0 472.0 700.0 7.00E+08 7.30E+07 9.6 3. Miniapplication02.12.2013 08:14 19.12.2013 12:30 30 30.0 0.73 411.0 Mainapplication17.02.2014 08:00 21.02.2014 15:30 30 80.0 0.76 103.5 1. Miniapplication17.03.2014 08:00 21.03.2014 17:06 30 80.0 0.76 105.1 2. Miniapplication28.04.2014 08:00 02.05.2014 16:30 30 80.0 0.76 104.5 3. Miniapplication

02.06.2014 08:00 04.06.2014 02:41 30 33.0 0.76 42.74. Miniapplication (interrupted: pressure)

30.06.2014 04.07.2014 30 0.0 0.76 0.0 766.8 573.0 5.73E+08 7.32E+07 7.8 5. Miniapplication (cancelled)24.11.2014 08:00 11.12.2014 16:30 31 300 0.72 416.5 Mainapplication

23.02.2015 27.02.2015 31 80 0.77 104.0 1. Miniapplication04.05.2015 08.05.2015 31 80 0.77 104.0 2. Miniapplication13.07.2015 17.07.2015 31 80 0.77 104.0 728.5 540.0 5.40E+08 7.35E+07 7.4 3. Miniapplication

05.12.2015 10.12.2015 32 125 1.00 125.0Mainapplication (iterrupted demin pump)

16.02.2016 23.02.2016 32 120 0.77 156.0 1. Miniapplication06.04.2016 13.04.2016 32 120 0.66 182.5 2. Miniapplication17.05.2016 23.05.2016 32 120 0.77 156.0 3. Miniapplication11.07.2016 17.07.2016 32 120 0.77 156.0 749.0 605.0 6.05E+08 7.37E+07 8.2 4. Miniapplication (scheduled)

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15.06.2016 EPRI BWR VIP Mitigation Committee Meeting 201611

6. Conclusion and discussion

• Effect of Platinum dosing on the inner surfaces (solubility of Fe)• Effect on Pt solution with the use of the additionally installed demin. water

pump and dilution factor 1:20 and more.• 1 rem = 10 mSv

Folie | |Kernkraftwerk Leibstadt AGFolie | |

Thank you for your kind attentionMichael Lichtinghagen

Chemistry and Radiation

Protection Dept.

Section Chemistry

NPP Leibstadt (KKL)

15.06.201612 EPRI BWR VIP Mitigation Committee Meeting 2016