IR 05000255/2019010
| ML19302E641 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 10/29/2019 |
| From: | Karla Stoedter NRC/RGN-III/DRS/EB2 |
| To: | Corbin D Entergy Nuclear Operations |
| Shared Package | |
| ML19302E718 | List: |
| References | |
| IR 2019010 | |
| Download: ML19302E641 (12) | |
Text
ber 29, 2019
SUBJECT:
REISSUEPALISADES NUCLEAR PLANTDESIGN BASIS ASSURANCE INSPECTION (PROGRAMS) INSPECTION REPORT 05000255/2019010
Dear Mr. Corbin:
The U.S. Nuclear Regulatory Commission (NRC) identified an administrative error in NRC Inspection Report 05000255/2019010 dated October 21, 2019, (ADAMS Accession Number ML19294A287). As a result, the NRC is reissuing the report in its entirety with the administrative error corrected.
On September 12, 2019, the NRC completed an inspection at Palisades Nuclear Plant and discussed the results of this inspection with you and other members of your staff. The results of this inspection are documented in the enclosed report.
One finding of very low safety significance (Green) is documented in this report. This finding involved a violation of NRC requirements. We are treating this violation as a non-cited violation (NCV) consistent with Section 2.3.2 of the Enforcement Policy.
If you contest the violation or significance or severity of the violation documented in this inspection report, you should provide a response within 30 days of the date of this inspection report, with the basis for your denial, to the U.S. Nuclear Regulatory Commission, ATTN:
Document Control Desk, Washington, DC 20555-0001; with copies to the Regional Administrator, Region III; the Director, Office of Enforcement; and the NRC Resident Inspector at Palisades. This letter, its enclosure, and your response (if any) will be made available for public inspection and copying at http://www.nrc.gov/reading-rm/adams.html and at the NRC Public Document Room in accordance with 10 CFR 2.390, Public Inspections, Exemptions, Requests for Withholding.
Sincerely,
/RA/
Karla K. Stoedter, Chief Engineering Branch 2 Division of Reactor Safety Docket No. 05000255 License No. DPR-20
Enclosure:
As stated
Inspection Report
Docket Number: 05000255 License Number: DPR-20 Report Number: 05000255/2019010 Enterprise Identifier: I-2019-010-0053 Licensee: Entergy Nuclear Operations, Inc.
Facility: Palisades Nuclear Plant Location: Covert, MI Inspection Dates: August 18, 2019 to September 12, 2019 Inspectors: N. Feliz-Adorno, Senior Reactor Inspector M. Greenleaf, Reactor Inspector M. Jones, Reactor Inspector Approved By: Karla K. Stoedter, Chief Engineering Branch 2 Division of Reactor Safety Enclosure
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting a design basis assurance inspection (programs) inspection at Palisades Nuclear Plant in accordance with the Reactor Oversight Process. The Reactor Oversight Process is the NRCs program for overseeing the safe operation of commercial nuclear power reactors. Refer to https://www.nrc.gov/reactors/operating/oversight.html for more information.
List of Findings and Violations Failure to Environmentally Qualify Electric Equipment Inside Containment for the Most Severe Chemical Composition Cornerstone Significance Cross-Cutting Report Aspect Section Mitigating Green None (NPP) 71111.21N Systems NCV 05000255/2019010-01 Open/Closed The inspectors identified a Green finding and an associated Non-Cited Violation of Title 10 of the Code of Federal Regulations, Part 50.49, "Environmental Qualification of Electric Equipment Important to Safety for Nuclear Power Plants," Paragraph (e)(3), for the licensee's failure to base the qualification of electric equipment inside containment on a chemical composition that was at least as severe as that resulting from the most limiting mode of plant operation. Specifically, the most severe chemical composition expected inside containment would result from the containment spray injection mode. However, the qualification of electric equipment inside containment was based on the less severe chemical composition of the containment spray recirculation mode, which is borated water from the injection mode neutralized by the sodium tetraborate located inside of containment.
Additional Tracking Items None.
INSPECTION SCOPES
Inspections were conducted using the appropriate portions of the inspection procedures (IPs) in effect at the beginning of the inspection unless otherwise noted. Currently approved IPs with their attached revision histories are located on the public website at http://www.nrc.gov/reading-rm/doc-collections/insp-manual/inspection-procedure/index.html. Samples were declared complete when the IP requirements most appropriate to the inspection activity were met consistent with Inspection Manual Chapter (IMC) 2515, Light-Water Reactor Inspection Program - Operations Phase. The inspectors reviewed selected procedures and records, observed activities, and interviewed personnel to assess licensee performance and compliance with Commission rules and regulations, license conditions, site procedures, and standards.
REACTOR SAFETY
===71111.21N - Design Bases Assurance Inspection (Programs)
The inspectors evaluated the environmental qualification program implementation through the sampling of the following components:
Select Sample Components to Review - Risk Significant/Low Design (Inside/Outside Containment) (IP Section 02.01) ===
- (1) Shutdown Cooling Suction Valve MO-3015
- (2) Low Pressure Safety Injection Pump P-67A Motor
- (3) Cable 19-I29A
- (4) Narrow Range Pressure Transmitter PT-0104B
- (5) Component Cooling Water Heat Exchanger Control Valve Pilot Valve SV-0821
- (6) Shutdown Cooling Heat Exchanger Inlet Valve SV-0937 Select Sample Components to Review - Primary Containment (Inside Containment)
(IP Section 02.01) (1 Sample)
- (1) Power Operated Relief Valve PRV-1042B
INSPECTION RESULTS
Failure to Environmentally Qualify Electric Equipment Inside Containment for the Most Severe Chemical Composition Cornerstone Significance Cross-Cutting Report Aspect Section Mitigating Green None (NPP) 71111.21N Systems NCV 05000255/2019010-01 Open/Closed The inspectors identified a Green finding and an associated Non-Cited Violation of Title 10 of the Code of Federal Regulations (10 CFR), Part 50.49, Environmental Qualification of Electric Equipment Important to Safety for Nuclear Power Plants, Paragraph (e)(3), for the licensee's failure to base the qualification of electric equipment inside containment on a chemical composition that was at least as severe as that resulting from the most limiting mode of plant operation. Specifically, the most severe chemical composition expected inside containment would result from the containment spray injection mode. However, the qualification of electric equipment inside containment was based on the less severe chemical composition of the containment spray recirculation mode, which is borated water from the injection mode neutralized by the sodium tetraborate located inside of containment.
Description:
The containment spray system has two modes of operation. During the initial injection mode, the containment spray system draws borated water from the safety injection and refueling water tank and sprays it inside containment to alleviate pressure during large break loss of coolant accidents and to scrub radioactive particles. The sprayed borated water collects at the containment sump where it is neutralized by mixing with sodium tetraborate, which is pre-staged in baskets inside of containment. The containment spray system transitions to its recirculation mode of operation after depleting the tank, drawing suction from the containment sump and spraying the recirculated solution inside containment to continue scrubbing radionuclides.
The most severe chemical composition expected inside containment would result from the containment spray initial injection mode. However, in 2004, the licensee discovered the environmental qualification of electric equipment inside of containment was based on the chemical effects of the containment spray recirculation mode. This condition was captured in the Corrective Action Program as CR-PLP-2004-1616. As a result, the licensee evaluated the effects of the initial spray pH. However, the inspectors noted the licensee did not evaluate the chemical compatibility of the initial spray with each exposed material composing the electric equipment required to be environmentally qualified. During this inspection period, the licensee determined this concern affected 17 systems such as low pressure injection, high pressure injection, and shutdown cooling.
Corrective Actions: The licensee was still evaluating its planned corrective actions at the time of the inspection. However, the continued non-compliance does not present an immediate safety concern because the licensee reasonably determined the affected equipment remained capable of performing their safety functions. Specifically, the licensee identified all material in environmentally qualified components inside containment and located an evaluation from a similar nuclear power plant addressing boric acid interaction with all but one of the materials located inside of Palisades containment. The licensee determined this evaluation reasonably demonstrated the evaluated materials were compatible with the initial borated water spray. Similarly, the licensee located industry information for the material that was not addressed by the evaluation (i.e., chlorinated polyethylene) and reasonably determined it was compatible with the initial borated water spray.
Corrective Action References: CR-PLP-2019-3692, CR-PLP-2019-3693, CR-PLP-2019-3694, CR-PLP-2019-3695, CR-PLP-2019-3697, CR-PLP-2019-3698, CR-PLP-2019-3699, CR-PLP-2019-3700, CR-PLP-2019-3702, CR-PLP-2019-3703, CR-PLP-2019-3704, CR-PLP-2019-3705, CR-PLP-2019-3706, CR-PLP-2019-3707, CR-PLP-2019-3708, CR-PLP-2019-3709, and CR-PLP-2019-3710.
Performance Assessment:
Performance Deficiency: The failure to base the qualification of electric equipment inside containment on a chemical composition that was at least as severe as that resulting from the most limiting mode of plant operation was contrary to 10 CFR 50.49(e)(3) and was performance deficiency.
Screening: The inspectors determined the performance deficiency was more than minor because it was associated with the Equipment Performance attribute of the Mitigating Systems cornerstone and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the failure to demonstrate qualification of electric equipment inside containment for the most severe chemical effects does not ensure the equipment would be capable of providing its accident mitigating functions.
Significance: The inspectors assessed the significance of the finding using Appendix A, The Significance Determination Process (SDP) for Findings At-Power. The finding screened as of very low safety significance (Green) because it did not result in the loss of operability or functionality of mitigating systems. Specifically, the licensee reasonably determined the affected equipment remained capable of performing their safety functions based on an evaluation from a similar nuclear power plant and industry information addressing boric acid interaction with the affected materials.
Cross-Cutting Aspect: Not Present Performance. No cross cutting aspect was assigned to this finding because the inspectors determined the finding did not reflect present licensee performance.
Enforcement:
Violation: Title 10 CFR 50.49(e)(3) requires The electric equipment qualification program must include and be based on, in part, Chemical Effects, and that The composition of chemicals used must be at least as severe as that resulting from the most limiting mode of plant operation (e.g., containment spray, emergency core cooling, or recirculation from containment sump).
Contrary to the above, as of September 16, 2019, the licensees electric equipment qualification program failed to include and be based on the chemical effects of the most severe composition of chemicals resulting from the most limiting mode of plant operation. Specifically, the most severe chemical composition expected inside containment would result from the containment spray injection mode. However, the qualification of electric equipment inside containment was based on the chemical composition of the containment spray recirculation mode, which was less severe due to the borated water from the injection mode being neutralized by the sodium tetraborate located inside of containment.
Enforcement Action: This violation is being treated as an non-cited violation, consistent with Section 2.3.2 of the Enforcement Policy.
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
- On September 12, 2019, the inspectors presented the design basis assurance inspection (programs) inspection results to Mr. Darrell Corbin and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection Type Designation Description or Title Revision or
Procedure Date
71111.21N Corrective Action CR-PLP-2004- PRE-NRC SSDI, RB Spray pH Considerations Title: FSA 03/02/2004
Documents 01616 Pre-NRC SSDI, RB Spray pH Considerations
CR-PLP-2015- EQ replacement dates occur before 1R24 begins 02/19/2015
00583
CR-PLP-2017- VOP-3015 Gear Box Grease Degraded 03/18/2017
01007
CR-PLP-2018- EMA-1206 oil was identified with higher than expected 01/12/2018
238 viscosity
Corrective Action CR-HQN-2019- The NRC identified that EN-MA-141, Attachment 1 does not 09/06/2019
Documents 01982 contain any reference to potential EQ implications during
Resulting from grease evaluation
Inspection CR-PLP-2019- Boric acid leak on P-67A 08/27/2019
03371
CR-PLP-2019- Corrective action document written for unsat oil viscosity for 08/29/2019
03409 EMA-1206 did not address EQ or past-operability
CR-PLP-2019- Unable to locate auxiliary feedwater pump P-8C motor oil 09/04/2019
03463 analysis for 2013
CR-PLP-2019- Auxiliary feedwater pump P-8C had unsat oil viscosity 09/04/2019
03464
CR-PLP-2019- DBD-7.01 contain misleading information regarding what 09/10/2019
03559 containment spray density is required for EQ Qualification of
equipment inside containment
CR-PLP-2019- Qualification of CIS did not consider chemical effects 09/16/2019
03692
CR-PLP-2019- Qualification of CLP did not consider chemical effects 09/16/2019
03693
CR-PLP-2019- Qualification of CRS did not consider chemical effects 09/16/2019
03694
CR-PLP-2019- Qualification of CSW did not consider chemical effects 09/16/2019
03695
CR-PLP-2019- Qualification of CVC did not consider chemical effects 09/16/2019
03697
Inspection Type Designation Description or Title Revision or
Procedure Date
CR-PLP-2019- Qualification of ESS did not consider chemical effects 09/16/2019
03698
CR-PLP-2019- Qualification of FWS did not consider chemical effects 09/16/2019
03699
CR-PLP-2019- Qualification of HPI did not consider chemical effects 09/16/2019
03700
CR-PLP-2019- Qualification of LPI did not consider chemical effects 09/16/2019
03702
CR-PLP-2019- Qualification of MFW did not consider chemical effects 09/16/2019
03703
CR-PLP-2019- Qualification of NMS did not consider chemical effects 09/16/2019
03704
CR-PLP-2019- Qualification of PCS did not consider chemical effects 09/16/2019
03705
CR-PLP-2019- Qualification of PZR did not consider chemical effects 09/16/2019
03706
CR-PLP-2019- Qualification of RIA did not consider chemical effects 09/16/2019
03707
CR-PLP-2019- Qualification of SDC did not consider chemical effects 09/16/2019
03708
CR-PLP-2019- Qualification of SIT did not consider chemical effects 09/16/2019
03709
CR-PLP-2019- Qualification of VAS did not consider chemical effects 09/16/2019
03710
Drawings VEN-E48 Install Conduit/Component Seals 4
Engineering EC-7083 Equivalent Replacement and/or Substitution of Nebula EP0 0
Changes Grease with MOV Long Life Grade 0 Grease
Engineering E48-EMA-01 EQ File - Louis-Allis Model COGX Motors 12
Evaluations E48-EMA-07 EQ File - Reliance Electric 2300 Vac motor 10
E48-SV-01 EQ file: Automatic Switch Company (ASCO) Model 206-381 18
and
NP 8320 solenoid valves
E48-VOP-03 EQ File - Limitorque Valve Operators with RH Motor 18
Insulation Systems Located in Containment
Inspection Type Designation Description or Title Revision or
Procedure Date
E48-XMTR-01 EQ File: Rosemount Series 1153B and 1153D Transmitters 8
E48-XMTR-02 EQ File: Rosemount Series 1154 Transmitters 8
Miscellaneous DBD-7.01 Electrical Equipment Qualification Program 10
DBD-7.02 EQ Master Equipment List 14
E48-CABLE-19 Samuel Moore EPDM Insulated and Hypalon Jacketed 13
Instrumentation Cable
E48-SV-08 ASCO Model NP 8316 and NP 8321 Solenoid Valves 18
E48-SV-24 Target Rock Power Operated Relief Valves for Pressurizer 7
Pressure
NUREG/CR-6095 Aging, Loss-of-Coolant Accident (LOCA), and High Potential 04/01/1994
Testing of Damaged Cables
Procedures EN-DC-303 Lubrication Program 1
EN-DC-310 Predictive Maintenance Program 8
EN-MA-141 Limitorque Valve Operator Model SMB/SB/SBD-000 13
Through 5 MOV and HBC Periodic Inspection
EOP-4.0 Loss of Coolant Accident Recovery 24
MSE-E-41 Refurbishment of Limitorque Type SMB-0 Though SMB-3 10
Actuators
SEP-EQ-PLP-001 Environmental Qualification of Electrical Equipment 2
SEP-LUB-PLP- Lubrication Analysis and Monitoring 2
001
WI-SPS-E-02 Insulation Resistance Testing of Electrical Equipment 9
Self-Assessments LO-PLPLO-2019- Environmental Qualification (EQ) Program Assessment 05/28/2019
00013
Work Orders WO00262884 PRV-1042B; VT-2 NOP/NOT (CR-PLP-2011-00191) 01/31/2011
WO00325740 MO-3015 Burnish Torque Switch Contacts 02/09/2014
WO51591547 PRV-1042B; Replace PRV-1042B EC-20196 08/19/2011
WO51591548 PRV-1043B; Replace PRV-1043B EC-20196 11/08/2010
WO52435844 *EEQ* REPLACE SV-0821 01/27/2014
WO52436138 EEQ Maint. - PM VOP-3015 02/09/2014
WO52537816 RI-59C - LTOP Pessure Transmitter Cals 10/19/2015
WO52544964 PT-0104B, EEQ Replace Transmitter 09/28/2015
Inspection Type Designation Description or Title Revision or
Procedure Date
WO52608846 P-67A MTR/PMP Oil Change 04/08/2016
WO52610930 EEQ Maint.-PM VOP-3009 06/28/2016
WO52650632 EEQ - EMA-1206 LPSI Pump P-67A Motor 03/27/2017
WO52681040 EEQ Maint. - PM VOP-3015 03/18/2017
WO52681204 EEQ Maint.-PM VOP-3012 07/25/2017
WO52753971 EEQ - EMA-1206 LPSI Pump P-67A Motor 09/18/2018
WO52765497 Thermalscan Equip.- P-67A Motor/Breaker 06/20/2018
WO52778170 RI-59C - LTOP Pressure Transmitter Cals 11/08/2018
WO52779578 QO-2X - Recirculation Actuation System 12/19/2014
WO52785113 P-67A MTR/PMP Oil Change 03/25/2019
WO52827608 Thermalscan Equip.- P-67A Motor/Breaker 06/18/2019
9