IR 05000263/2020012
| ML20147A637 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 05/26/2020 |
| From: | Aaron Mccraw NRC/RGN-III/DRP/TSS |
| To: | Conboy T Northern States Power Co |
| References | |
| EA-13-109 IR 2020012 | |
| Download: ML20147A637 (9) | |
Text
May 26, 2020 EA-13-109 Mr. Thomas Conboy Site Vice President Northern States Power Company, Minnesota Monticello Nuclear Generating Plant 2807 West County Road 75 Monticello, MN 55362-9637 SUBJECT: MONTICELLO NUCLEAR GENERATING PLANT - INSPECTION OF THE IMPLEMENTATION OF EA-13-109: ORDER MODIFYING LICENSES WITH REGARD TO RELIABLE HARDENED CONTAINMENT VENTS CAPABLE OF OPERATION UNDER SEVERE ACCIDENT CONDITIONS REPORT 05000263/2020012
Dear Mr. Conboy:
On May 7, 2020, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Monticello Nuclear Generating 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.
No findings or violations of more than minor significance were identified during this inspection.
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 Title 10 of the Code of Federal Regulations 2.390, Public Inspections, Exemptions, Requests for Withholding.
Sincerely,
/RA/
Aaron T. McCraw, Team Leader Technical Support Staff Division of Reactor Projects Docket No. 05000263 License No. DPR-22
Enclosure:
As stated
Inspection Report
Docket Number: 05000263 License Number: DPR-22 Report Number: 05000263/2020012 Enterprise Identifier: I-2020-012-0008 Licensee: Northern States Power Company, Minnesota Facility: Monticello Nuclear Generating Plant Location: Monticello, MN Inspection Dates: May 04, 2020 to May 07, 2020 Inspectors: D. Krause, Resident Inspector S. Sheldon, Project Engineer Approved By: Aaron T. McCraw, Team Leader Technical Support Staff Division of Reactor Projects Enclosure
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an Inspection of The Implementation of EA-13-109: Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions at Monticello Nuclear Generating 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
No findings or violations of more than minor significance were identified.
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/readingrm/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. From January 1 - March 19, 2020, the inspectors performed plant status activities described in IMC 2515, Appendix D, Plant Status, and conducted routine reviews using IP 71152, Problem Identification and Resolution. 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.
Starting on March 20, 2020, in response to the National Emergency declared by the President of the United States on the public health risks of the coronavirus (COVID-19), resident inspectors were directed to begin telework and to remotely access licensee information using available technology. During this time the resident inspectors performed periodic site visits each week and during that time conducted plant status activities as described in IMC 2515, Appendix D; and observed risk significant activities when warranted. In addition, resident and regional baseline inspections were evaluated to determine if all or portion of the objectives and requirements stated in the IP could be performed remotely. If the inspections could be performed remotely, they were conducted per the applicable IP. In the cases where it was determined the objectives and requirements could not be performed remotely, management elected to postpone and reschedule the inspection to a later date.
OTHER ACTIVITIES
- TEMPORARY INSTRUCTIONS, INFREQUENT AND ABNORMAL 2515/193 - Inspection of the Implementation of EA-13-109: Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation under Severe Accident Conditions Inspection of the Implementation of EA-13-109: Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation under Severe Accident Conditions (1 Sample)
- (1) Inspectors reviewed documentation, conducted walkdowns, and held discussions with licensee staff to verify implementation of a reliable hardened containment vent as described in the plant specific submittals and the associated safety evaluation (ADAMS Accession No. ML19255F582) to determined compliance with NRC Order EA-13-109 Phase 1, Reliable, Severe Accident Capable Wetwell Venting System (ADAMS Accession No. ML13143A321).
The inspectors verified that the licensee satisfactorily:
- Installed the Hardened Containment Vent System (HCVS) to meet the performance objectives outlined in Section A.1.1 of Attachment 2 to the Order EA-13-109;
- Installed the HCVS system with the design features specified in Section A.1.2 of Attachment 2 to the Order EA-13-109;
- Designed the HCVS to meet the quality standards described in Section A.2 of 2 to the Order EA-13-109;
- Developed and implemented adequate maintenance and testing of HCVS equipment to ensure their availability and capability;
- Developed and issued procedures to safely operate the HCVS using normal power supplies, during Extended Loss of AC Power (ELAP), and a postulated severe accident scenario, and integrated the procedures into existing plant procedures; and
- Trained their staff to ensure personnel can proficiently operate the HCVS.
Inspectors reviewed documentation, conducted walkdowns, and held discussions with licensee staff to verify implementation of a reliable hardened containment vent as described in the plant specific submittal and the associated safety evaluation (ADAMS Accession No. ML19255F582) to determine compliance with NRC Order EA-13-109 Phase 2, Reliable, Severe Accident Capable Drywell (or alternative strategy) Venting System (ADAMS Accession No. ML13143A321).
The inspectors verified that the licensee satisfactorily developed a strategy making it unlikely that the licensee would need to vent from the containment drywell, that includes the following:
- Implemented the Severe Accident Water Addition (SAWA)/Severe Accident Water Management (SAWM) systems as defined and fulfilled functional requirements for installed and portable equipment;
- Installed and/or identified the previously-installed instrumentation necessary to implement SAWM;
- Developed and implemented adequate maintenance and testing of SAWA/SAWM equipment to ensure availability and capability;
- Developed and issued procedures to safely operate the SAWA/SAWM during an ELAP and during postulated severe accident scenario, and integrated their procedures into their existing plant procedures such that entry into and exiting from the procedures are clear when using existing plant procedures; and
- Trained their staff to ensure personnel can proficiently operate the HCVS during an ELAP and accident scenario.
The inspectors verified that any noncompliance with requirements, and standards identified during the inspection was entered into the licensee's corrective action program.
INSPECTION RESULTS
No findings were identified.
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
- On May 7, 2020, the inspectors presented the Inspection of The Implementation of EA-13-109: Order Modifying Licenses with Regard to Reliable Hardened Containment Vents Capable of Operation Under Severe Accident Conditions results to Mr. T. Conboy, Site Vice President, and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection Type Designation Description or Title Revision or
Procedure Date
2515/193 Calculations PRA-CALC-14- Monticello MAAP Thermal Hydraulic Calculations to Support 2
003 Extended Loss of AC Power (ELAP) Mitigating Strategies
Corrective Action 501000002224 Hard Pipe Vent Rad Monitor Failure 0
Documents 501000008583 RM-4544 Signal Failure During Rounds 0
501000021681 B.5.B Vehicle Needs New Oil Pan 0
501000023266 Flex/Alternate Emergency Access Point 0
501000026426 RFO29 Flex Lead Bolt Issue 0
501000026766 Fuel Leak from FLEX Pump P-506 0
501000028840 Hole Developed on 5" 50ft Discharge Hose 0
501000030038 Potential FLEX Generator PM Enhancement 0
501000032050 HPV Rad Monitor Failed Off Scale Low 0
501000034669 FLEX Fire Hose Connection Icing Issue 0
501000035387 Snow Removal for FLEX Not Followed 0
501000035574 HCVS FSA SAWA Valve Testing 0
501000036074 RM-4544 Spiking/ Losing Power 0
501000036090 Hard Pipe Vent Rad Monitor Found Failed 0
501000038161 Hard Pipe Rad Monitor Power Loss 0
501000038252 RM-4544, HPV Rad Monitor failed 0
501000039165 Adverse Trend of HPV Rad Monitor 0
501000039448 SAWA Maint Plan Issue Not Addressed 0
Corrective Action 501000040276 HCVS 2020 - Procedure Enhancement 05/05/2020
Documents 501000040360 HCVS 2020 - NRC Question on Procedures 05/06/2020
Resulting from
Inspection
Drawings NH-116629 Hard Pipe Vent System 80
Miscellaneous Monticello Nuclear Generating Plant FLEX Validation and 12/01/2018
Staffing Addendum
MT-OPS-CYCLE Training Attendance: Licensed Operator Requal for Cycle 0
18B RO 18B
2515/193 Miscellaneous FLEX Diverse and Flexible Coping Strategies (FLEX) Program 10
Document
LOR-17B-005L Training Lesson Plan 0
M-8107L-041 Initial Licensed Training Plan 16
M8119S-007 Training Simulator Scenario 0
MT-ILT-FLX-001L Training Lesson Plan 3
MT-LOR-18B- Training Lesson Plan 0
004L
MT-LOR-20B- Training Simulator Scenario 0
001S
MT-NL0-18B- Training Lesson Plan 0
001L
MT-NLO-FLX- Training Lesson Plan 3
001-L
MT-OPS-CYCLE Training Attendance: Licensed Operator Requal for 03/29/2017
17B LOR Cycle 17B
MT-OPS-CYCLE Training Attendance: Non-Licensed Operator Requal for 0
18B NLO Cycle 18B
MT-OPS-CYCLE Training Attendance: Licensed SRO Requal for Cycle 18B 0
18B SRO
QF 1040-16 - MT- Training Attendance Sheet 06/12/2018
ILT-FLX-001L
Procedures 1415 Primary Containment Hard Pipe Vent Valve Exercise 7
AWI-04.05.01 General Work Controls 34
AWI-08.16.01 Monticello Emergency Operating Procedure and Beyond- 11
Design-Basis Guideline Maintenance Program
C.5-1200 Primary Containment Control 22
C.5-3203 Use of Alternate Injection Systems for RPV Makeup 18
C.5-3505 Venting Primary Containment 15
C.5-4050 SBO without High Pressure Injection 2
C.5-4051 Energize LPCI Swing Bus During SBO 1
C.5-4201 FLEX Portable Diesel Pump Staging and Hose Connection 1
C.5-4202 Portable Diesel Pump (PDP) Operation 3
C.5-4301 Spent Fuel Pool Makeup with FLEX Portable Diesel Pump 3
C.5-4453 Energize Hard Pipe Vent During SBO 0
FP-BDB-EQP-01 Equipment Important to BDB Compliance 9
FP-G-DOC-03 Procedure and Work Instruction use and Adherence 17
FP-OP-COO-27 Work Management 5
FP-PA-ARP-01 CAP Process 55
Work Orders 00491481 Hard Pipe Vent LLRT 05/12/2017
00533714 01 1415 PCT Hard Pipe Vent Valve Exercise 05/08/2017
00540339 07 HPV N2 Supply and Alternate Operating Station For 05/09/2017
00540342 19 EC26083 - Permanent Power Installation All Post Installation 05/03/2017
Testing
00540342 24 EC26083 - Initial Charge and Capacitance Testing 03/09/2017
700014154 0010 Primary Containment Hard Pipe Vent Valve Exercise 04/21/2019
700026369 0070 ECR6MOD0002692I - PDG Phase Rotation Check 03/26/2018
700026369 0080 ECR6MOD00026921 - B4353 Phase Rotation Check 03/15/2018
700040377 0010 P.507 Portable Diesel Pump Testing 06/12/2019
700040561 0010 #11 Portable Diesel Water Pump Testing 06/21/2019
700046725 0010 P-506 Diesel Fire Pump 12M PM 01/07/2020
700069919 0010 Periodic Cycle of Flex Valves 04/27/2020
7