IR 05000528/2015003: Difference between revisions
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[[Issue date::October 22, 2015]] | [[Issue date::October 22, 2015]] | ||
Randall Executive Vice President, Nuclear/CNO Mail Station 7602 Arizona Public Service Company P.O Box 52034 | Randall Executive Vice President, Nuclear/CNO Mail Station 7602 Arizona Public Service Company P.O Box 52034 | ||
SUBJECT: PALO VERDE NUCLEAR GENERATING STATION - NRC INTEGRATED INSPECTION REPORT 05000528/2015003, 05000529/2015003, AND 05000530/2015003 | Phoenix, Arizona 85072 | ||
-2034 | |||
SUBJECT: PALO VERDE NUCLEAR GENERATING STATION | |||
- NRC INTEGRATED INSPECTION REPORT 05000528/2015003, 05000529/2015003, AND 05000530/2015003 | |||
==Dear Mr. Edington:== | ==Dear Mr. Edington:== | ||
On September 30, 2015, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at the Palo Verde Nuclear Generating Station Units 1, 2, and 3. On October 8, 2015, the NRC inspectors discussed the results of this inspection with R. Bement and other members of your staff. Inspectors documented the results of this inspection in the enclosed inspection report. The NRC inspectors did not identify any findings or violations of more than minor significance. In accordance with Title 10 of the Code of Federal Regulations (10 CFR) 2.390, "Public Inspections, Exemptions, Requests for Withholding," a copy of this letter, its enclosure, and your response (if any) will be available electronically for public inspection in the NRC's Public Document Room or from the Publicly Available Records (PARS) component of the NRC's Agencywide Documents Access and Management System (ADAMS). ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room). | On September 30, 2015 | ||
, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at the Palo Verde Nuclear Generating Station Units 1, 2, and 3 | |||
. On October 8, 2015 | |||
, the NRC inspectors discussed the results of this inspection with R. Bement and other members of your staff. | |||
Inspectors documented the results of this inspection in the enclosed inspection report. The NRC inspectors did not identify any findings or violations of more than minor significance | |||
. In accordance with Title 10 of the Code of Federal Regulations (10 CFR) 2.390, "Public Inspections, Exemptions, Requests for Withholding," | |||
a copy of this letter, its enclosure, and your response (if any) will be available electronically for public inspection in the NRC | |||
's Public Document Room or from the Publicly Available Records (PARS) component of the NRC's Agencywide Documents Access and Management System (ADAMS). | |||
ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading | |||
-rm/adams.html (the Public Electronic Reading Room). | |||
Sincerely,/RA/ | Sincerely,/RA/ | ||
Geoffrey Miller, Chief Project Branch D Division of Reactor Projects Docket Nos. 50 528, 50 529, 50 530 License Nos. NPF 41, NPF 51, NPF 74 | Geoffrey Miller, Chief Project Branch D Division of Reactor Projects Docket Nos. 50 528, 50 529, 50 530 License Nos. NPF 41, NPF 51, NPF 74 Enclosure s: Inspection Report 05000528/201500 3, 05000529/201500 3, 05000530/201500 3 w/ | ||
=== | ===Attachment:=== | ||
Supplemental Information | |||
SUNSI Review By: BH ADAMS Yes NoPublicly Available Non-Publicly Available Non-Sensitive Sensitive OFFICE DRP/SRI DRP/RI DRI/RI DRP/SPE DRS/C DRS/C NAME CPeabody DReinert DYou BHagar TFarnholtz GWerner SIGNATURE | |||
/RA/BHagar for /RA/BHagar for /RA/BHagar for /RA/JMelfi for /RA/ /RA/ DATE 10/22/15 10/22/15 10/22/15 10/16/15 10/20/15 10/20/15 OFFICE DRS/C DRS/C DRS/C TL/TSB DRP/C NAME VGaddy MHaire HGepford ERuesch GMiller SIGNATURE | |||
/RA/ /RA/ /RA/ /RA/ /RA/ DATE 10/19/15 10/16/15 10/16/15 10/20/15 10/21/15 Letter to from G. Miller dated October 22, 2015 | |||
SUBJECT: PALO VERDE NUCLEAR GENERATING STATION | |||
- NRC INTEGRATED INSPECTION REPORT 05000528/2015003, 05000529/2015003, AND 05000530/2015003 DISTRIBUTION | |||
: Regional Administrator (Marc.Dapas@nrc.gov) | |||
Deputy Regional Administrator (Kriss.Kennedy@nrc.gov) | |||
DRP Director (Troy.Pruett@nrc.gov) | |||
DRP Deputy Director (Ryan.Lantz@nrc.gov) | |||
DRS Director (Anton.Vegel@nrc.gov) | |||
DRS Deputy Director (Jeff.Clark@nrc.gov) | |||
Senior Resident Inspector (Charles.Peabody@nrc.gov) | |||
Resident Inspector (Dustin.Reinert@nrc.gov) | |||
Resident Inspector (David.You@nrc.gov) | |||
Branch Chief, DRP/D (Geoffrey.Miller@nrc.gov) | |||
Senior Project Engineer, DRP/D (Bob.Hagar@nrc.gov) | |||
Project Engineer, DRP/D (Jan.Tice@nrc.gov) | |||
Public Affairs Officer (Victor.Dricks@nrc.gov) | |||
Public Affairs Officer (Lara.Uselding@nrc.gov) | |||
Project Manager (Margaret.Watford@nrc.gov) | |||
Acting Team Leader, DRS/TSS (Eric.Ruesch@nrc.gov) | |||
RITS Coordinator (Marisa.Herrera@nrc.gov) | |||
ACES (R4Enforcement.Resource@nrc.gov) | |||
Regional Counsel (Karla.Fuller@nrc.gov) | |||
Technical Support Assistant (Loretta.Williams@nrc.gov) | |||
Congressional Affairs Officer (Jenny.Weil@nrc.gov) | |||
Congressional Affairs Officer (Angel.Moreno@nrc.gov) | |||
RIV/ETA: OEDO (Cindy.Rosales.Cooper@nrc.gov) | |||
ROPreports Enclosure U.S. NUCLEAR REGULATORY COMMISSION REGION IV Docket: 05000528, 05000529, 05000530 License: NPF-41, NPF-51, NPF-74 Report: 05000528/2015003, 05000529/2015003, 05000530/2015003 Licensee: | |||
Arizona Public Service Company Facility: | |||
Palo Verde Nuclear Generating Station Location: | |||
5801 South Wintersburg Road Tonopah, AZ 85354 Dates: July 1, 2015 through September 30, 2015 Inspectors: | |||
C. Peabody, Senior Resident Inspector D. Reinert, PhD, Resident Inspector D. You, Resident Inspector Approved By: Geoffrey B. Miller Chief, Project Branch D Division of Reactor Projects | |||
-2- | -2- | ||
=SUMMARY= | =SUMMARY= | ||
IR 05000528, 529, 530/ | IR 05000528, 529, 530/201500 2; 7/1/2015 - 9/30/2015; Palo Verde Nuclear Generating Station Units 1, 2, and 3, Integrated Inspection Report The inspection activities described in this report were performed between July 1, 2015 and September 30 | ||
, 2015, by the resident inspectors at Palo Verde Nuclear Generating Station. The NRC's program for overseeing the safe operation of commercial nuclear power reactors is described in NUREG | |||
-1649, "Reactor Oversight Process." | |||
No findings were identified. | |||
==PLANT STATUS== | ==PLANT STATUS== | ||
Units 1, 2, and 3 operated at 100% power for the entire inspection period. On September 16, 2015 Unit 2 declared a Notice of Unusual Event upon the rapid combustion of a Non-Class 1E 480V load center breaker that was being returned to service following maintenance. | Units 1, 2, and 3 operated at 100% power for the entire inspection period. | ||
On September 16, 2015 Unit 2 declared a Notice of Unusual Event upon the rapid combustion of a Non-Class 1E 480V load center breaker that was being returned to service following maintenance. | |||
=REPORT DETAILS= | =REPORT DETAILS= | ||
| Line 58: | Line 108: | ||
====a. Inspection Scope==== | ====a. Inspection Scope==== | ||
On September 21, 2015, the inspectors completed an inspection of the station's readiness for seasonal extreme weather conditions. The inspectors reviewed the licensee's adverse weather procedures for severe thunderstorms during the monsoon season and evaluated the licensee's implementation of these procedures. The inspectors verified that prior to the monsoon season, the licensee had corrected weather-related equipment deficiencies identified during the previous monsoon season. The inspectors selected a risk-significant system that | On September 21, 2015, the inspectors completed an inspection of the station's readiness for seasonal extreme weather conditions. The inspectors reviewed the licensee's adverse weather procedures for severe thunderstorms during the monsoon season and evaluated the licensee's implementation of these procedures. The inspectors verified that prior to the monsoon season | ||
, the licensee had corrected weather-related equipment deficiencies identified during the previous monsoon season. | |||
The inspectors selected a risk-significant system that w as required to be protected from severe thunderstorm and flooding | |||
: Essential spray pond system The inspectors reviewed the licensee's procedures and design information to ensure the system would remain functional when challenged by adverse weather. The inspectors verified that operator actions described in the licensee's procedures were adequate to maintain readiness of these systems. The inspectors walked down portions of these systems to verify the physical condition of the adverse weather protection features. | |||
These activities | These activities constitute d one sample of readiness for seasonal adverse weather | ||
, as defined in Inspection Procedure 71111.01. | |||
====b. Findings==== | ====b. Findings==== | ||
| Line 68: | Line 123: | ||
====a. Inspection Scope==== | ====a. Inspection Scope==== | ||
On July 18, 2015 the inspectors completed an inspection of the station's readiness for impending adverse weather conditions. The inspectors reviewed plant design features, the licensee's procedures to respond to tornadoes and high winds, and the licensee's implementation of these procedures. The inspectors evaluated operator staffing and accessibility of controls and indications for those systems required to control the plant. These activities constitute one sample of readiness for impending adverse weather | On July 18, 2015 the inspectors completed an inspection of the station's readiness for impending adverse weather conditions. | ||
The inspectors reviewed plant design features | |||
, | |||
the licensee's procedures to respond to tornadoes and high winds | |||
, and the licensee's implementation of these procedures. | |||
The inspectors evaluated operator staffing and accessibility of controls and indications for those systems required to control the plant | |||
. These activities constitute one sample of readiness for impending adverse weather condition s, as defined in Inspection Procedure 71111.01. | |||
====b. Findings==== | ====b. Findings==== | ||
| Line 75: | Line 138: | ||
==1R04 Equipment Alignment== | ==1R04 Equipment Alignment== | ||
{{IP sample|IP=IP 71111.04}} | {{IP sample|IP=IP 71111.04}} | ||
===.1 Partial | ===.1 Partial Walk=== | ||
down | |||
====a. Inspection Scope==== | ====a. Inspection Scope==== | ||
The inspectors performed partial system | The inspectors performed partial system wa lk-downs of the following risk | ||
-significant systems: September 9, 2015 | |||
, Unit 2 plant protection system channels and setpoints September 9, 2015, Unit 3 plant protection system channels and setpoints September 17, 2015, Unit 1 containment spray system train A The inspectors reviewed the licensee's procedures and system design information to determine the correct lineup for the systems. They visually verified that critical portions of the systems or trains were correctly aligned for the existing plant configuration | |||
. These activities constitute d three partial system walk | |||
-down sample s as defined i n Inspection Procedure 71111.04. | |||
====b. Findings==== | ====b. Findings==== | ||
| Line 88: | Line 157: | ||
====a. Inspection Scope==== | ====a. Inspection Scope==== | ||
The inspectors evaluated the licensee's fire protection program for operational status and material condition. The inspectors focused their inspection on six plant areas important to safety: July 23, 2015, Unit 1 plant computer room, fire zone | The inspectors evaluated the licensee's fire protection program for operational status and material condition. The inspectors focused their inspection on six plant areas important to safety | ||
: July 23, 2015, Unit 1 plant computer room | |||
, fire zone July 23, 2015, Unit 3 plant computer room, fire zone 16 July 30, 2015 | |||
, Unit 2 remote shutdown room, fire zone 10 July 30, 2015, Unit 3 remote shutdown room, fire zone 10 August 1, 2015, Unit 1 main control room, fire zone August 13, 2015, Unit 2 auxiliary building 100' east electrical penetration room fire zone 42B For each area, the inspectors evaluated the fire plan against defined hazards and defense-in-depth features in the licensee's fire protection program. The inspectors evaluated control of transient combustibles and ignition sources, fire detection and suppression systems, manual firefighting equipment and capability, passive fire protection features, and compensatory measures for degraded conditions. | |||
These activities constitute d six quarterly inspection sample s, as defined in Inspection Procedure 71111.05. | |||
====b. Findings==== | ====b. Findings==== | ||
| Line 98: | Line 172: | ||
====a. Inspection Scope==== | ====a. Inspection Scope==== | ||
On August 8, 2015, the inspectors observed an evaluated simulator scenario performed by an operating crew. The inspectors assessed the performance of the operators and the evaluators' critique of their performance. These activities constitute completion | On August 8, 2015 | ||
, the inspectors observed an evaluated simulator scenario performed by an operating crew | |||
. The inspectors assessed the performance of the operators and the evaluators' critique of their performance. | |||
These activities constitute completion o f one quarterly licensed operator requalification program sample | |||
, as defined in Inspection Procedure 71111.11. | |||
====b. Findings==== | ====b. Findings==== | ||
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====a. Inspection Scope==== | ====a. Inspection Scope==== | ||
On August 29, 2015, the inspectors observed the performance of on-shift licensed operators in the plant's main control room. At the time of the observations, the plant was in a period of heightened activity due to Engineered Safety Features Actuation System relay testing. The inspectors observed the operators' performance of the following activities: | On August 29, 2015, the inspectors observed the performance of on | ||
-shift licensed operators in the plant's main control room. At the time of the observations, the plant was in a period of heightened activity due to Engineered Safety Features Actuation System relay testing | |||
. The inspectors observed the operators' performance of the following activities: | |||
Pre-job briefing for operators, electricians, and instrumentation and controls technicians Relay functional test setup and prerequisites Relay testing an d expected actuation of safety features Relay testing and equipment restoration In addition, the inspectors assessed the operators' adherence to plant procedures, including the conduct of shift operations procedure, 40DP-9OP02, and other operations department policies. | |||
These activities constitute completion of one quarterly licensed operator performance sample, as defined in Inspection Procedure 71111.11. | |||
====b. Findings==== | ====b. Findings==== | ||
| Line 115: | Line 199: | ||
====a. Inspection Scope==== | ====a. Inspection Scope==== | ||
The inspectors reviewed two instances of degraded performance or condition of safety-related structures, systems, and components (SSCs): September 15, 2015, Unit 3 engineered safety features actuation system failed manual actuation switches September 22, 2015, Unit 2 diverse auxiliary feedwater system, constant error signals due to degraded fiber optic cables | The inspectors reviewed two instances of degraded performance or condition of safety | ||
-related structures, systems, and components (SSCs): September 15, 2015, Unit 3 engineered safety features actuation system failed manual actuation switches September 22, 2015 | |||
, Unit 2 diverse auxiliary feedwater system | |||
, constant error signals due to degraded fiber optic cables The inspectors reviewed the extent of condition of possible common cause SSC failures and evaluated the adequacy of the licensee's corrective actions. The inspectors reviewed the licensee's work practices to evaluate whether these may have played a role in the degradation of the SSCs. The inspectors assessed the licensee's characterization of the degradation in accordance with 10 CFR 50.65 (the Maintenance Rule), and verified that the licensee was appropriately tracking degraded performance and conditions in accordance with the Maintenance Rule. | |||
These activities constitute d completion of two maintenance effectiveness sample s, as defined in Inspection Procedure 71111.12. | |||
====b. Findings==== | ====b. Findings==== | ||
| Line 126: | Line 215: | ||
On September 9, 2015, the inspectors reviewed the weekly risk assessment for Unit 2. This risk assessment is performed by the licensee prior to changes in plant configuration and the risk management actions taken by the licensee in response to elevated risk. | On September 9, 2015, the inspectors reviewed the weekly risk assessment for Unit 2. This risk assessment is performed by the licensee prior to changes in plant configuration and the risk management actions taken by the licensee in response to elevated risk. | ||
The inspectors verified that this risk assessment was performed timely and in accordance with the requirements of 10 CFR 50.65 (the Maintenance Rule) and plant procedures. The inspectors reviewed the accuracy and completeness of the licensee's risk assessment and verified that the licensee implemented appropriate risk management actions based on the result of the assessment | The inspectors verified that this risk assessment was performed timely and in accordance with the requirements of 10 CFR 50.65 (the Maintenance Rule) and plant procedures. The inspectors reviewed the accuracy and completeness of the licensee's risk assessment and verified that the licensee implemented appropriate risk management actions based on the result of the assessment. | ||
The inspectors verified that the licensee appropriately developed and followed a work plan for | Additionally on August 14, 2015, the inspectors also observed portions of emergent work to repair a 4-way nitrogen supply valve to main steam isolation valve 181. | ||
This emergent work activit y that had the potential to cause an initiating event, or to affect the functional capability of mitigating systems | |||
. | |||
The inspectors verified that the licensee appropriately developed and followed a work plan for th is activity. The inspectors verified that the licensee took precautions to minimize the impact of the work activit y on unaffected structures, systems, and components (SSCs). | |||
These activities constitute completion of two maintenance risk assessments and emergent work control inspection samples | |||
, as defined in Inspection Procedure 71111.13. | |||
====b. Findings==== | ====b. Findings==== | ||
No findings were identified. | No findings were identified. | ||
{{a|1R15}} | {{a|1R15}} | ||
==1R15 Operability Determinations and Functionality Assessments | ==1R15 Operability Determinations== | ||
and Functionality Assessments (71111.15) | |||
====a. Inspection Scope==== | ====a. Inspection Scope==== | ||
The inspectors reviewed five operability determinations and functionality assessments that the licensee performed for degraded or nonconforming structures, systems, or components (SSCs): | The inspectors reviewed five operability determinations and functionality assessments that the licensee performed for degraded or nonconforming structures, systems, or components (SSCs): | ||
#88 upper gripper coil current noise | August 27, 2015, operability determination of Unit 2 control element assembly | ||
#88 upper gripper coil current noise August 31, 2015 | |||
, operability determination of the steam generators due to revised input parameters used for UFSAR Chapter 15 accident analysis September 10, 2015, functionality assessment of Unit 2 train A essential cooling water radiation monitor following failed source check September 23, 2015, operability determination of Unit 1 high pressure safety injection pump B oil leakage September 24, 2015 | |||
, functionality assessment of Unit 3 reactor coolant pump D circuit breaker half trip The inspectors reviewed the timeliness and technical adequacy of the licensee's evaluations. Where the licensee determined the degraded SSC to be operable or functional, the inspectors verified that the licensee's compensatory measures were appropriate to provide reasonable assurance of operability or functionality. The inspectors verified that the licensee had considered the effect of other degraded conditions on the operability or functionality of the degraded SSC | |||
. | |||
These activities constitute completion of five operability and functionality review samples, as defined in Inspection Procedure 71111.15. | These activities constitute completion of five operability and functionality review samples, as defined in Inspection Procedure 71111.15. | ||
| Line 145: | Line 245: | ||
No findings were identified. | No findings were identified. | ||
{{a|1R19}} | {{a|1R19}} | ||
==1R19 Post-Maintenance | ==1R19 Post-Maintenance== | ||
Testing (71111.19) | |||
====a. Inspection Scope==== | ====a. Inspection Scope==== | ||
The inspectors reviewed five post-maintenance testing activities that affected risk-significant structures, systems, or components (SSCs): | The inspectors reviewed five post-maintenance testing activities that affected risk | ||
-significant structures, systems, or components (SSCs): | |||
August 17, 2015 | |||
, Unit 1 bistable comparator car d for high-high containment pressure channel D alarm August 11, 2015, Unit 2 charging pump A post maintenance test after conducting a test instruction August 26, 2015, Unit 3 bistable comparator card for high | |||
-high containment pressure channel D alarm September 2, 2015, Unit 1 auxiliary feedwater actuation system switch replacemen t September 9, 2015, Unit 2 safety injection valve #676 circuit breaker contact replacement | |||
The inspectors reviewed licensing- and design | |||
-basis documents for the SSCs and the maintenance and post-maintenance test procedures. | |||
The inspectors observed the performance of the post | |||
-maintenance tests to verify that the licensee performed the tests in accordance with approved procedures, satisfied the established acceptance criteria, and restored the operability of the affected SSCs. | |||
These activities constitute completion of five post-maintenance testing inspection samples, as defined in Inspection Procedure 71111.19. | These activities constitute completion of five post-maintenance testing inspection samples, as defined in Inspection Procedure 71111.19. | ||
| Line 161: | Line 272: | ||
====a. Inspection Scope==== | ====a. Inspection Scope==== | ||
The inspectors observed eight risk-significant surveillance tests and reviewed test results to verify that these tests adequately demonstrated that the structures, systems, and components (SSCs) were capable of performing their safety functions: | The inspectors observed eight risk-significant surveillance tests and reviewed test results to verify that these tests adequately demonstrated that the structures, systems, and components (SSCs) were capable of performing their safety functions: | ||
In-service | |||
In-service test s: August 20, 2015 | |||
, Unit 2 essential chill ed water pump B Reactor coolant system leak detection tests: September 28, 2015, Unit 2 reactor coolant system water inventory calculation | |||
Other surveillance tests: | |||
July 9, 2015, Unit 3 core protection calculator channel A functional test July 14, 2015 | |||
, Unit 2 supplementary protection system channel A response time testing August 1, 2015, Unit 3 reactor coolant system specific activity testing August 19, 2015, Unit 2 plant protection system channel A functional test August 29, 2015, Unit 2 engineered safety features actuation system train A subgroup relay functional testing September 25, 2015, Unit 3 safety injection tank narrow range level verifications | |||
The inspectors verified that these test s met technical specification requirements, that the licensee performed the tests in accordance with their procedures, and that the results of the test satisfied appropriate acceptance criteria. The inspectors verified that the licensee restored the operability of the affected SSCs following testing. | |||
These activities constitute completion of eight surveillance testing inspection sample s, as defined in Inspection Procedure 71111.22. | |||
====b. Findings==== | ====b. Findings==== | ||
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====a. Inspection Scope==== | ====a. Inspection Scope==== | ||
On August 8, 2015, the inspectors observed simulator-based licensed operator requalification training that included implementation of the licensee's emergency plan. | On August 8, 2015 | ||
, the inspectors observed simulator | |||
-based licensed operator requalification training that included implementation of the licensee's emergency plan. | |||
The inspectors verified that the licensee's emergency classifications, off-site notifications, and protective action recommendations were appropriate and timely. The inspectors verified that any emergency preparedness weaknesses were appropriately identified by the evaluators and entered into the corrective action program for resolution. | The inspectors verified that the licensee's emergency classifications, off | ||
-site notifications, and protective action recommendations were appropriate and timely. The inspectors verified that any emergency preparedness weaknesses were appropriately identified by the evaluators and entered into the corrective action program for resolution. | |||
These activities constitute completion of one training observation sample, as defined in Inspection Procedure 71114.06. | These activities constitute completion of one training observation sample, as defined in Inspection Procedure 71114.06. | ||
| Line 198: | Line 322: | ||
No findings were identified. | No findings were identified. | ||
===.11 Reactor Coolant System Identified Leakage (BI02) | ===.11 Reactor Coolant System=== | ||
Identified Leakage (BI02) | |||
====a. Inspection Scope==== | ====a. Inspection Scope==== | ||
The inspectors reviewed the licensee's records of reactor coolant system identified leakage for the period of July 1, 2014 through June 20, 2015 to verify the accuracy and completeness of the reported data. The inspectors observed the performance of a reactor coolant system water inventory determination in accordance with station procedure 40ST-9RC02 on September 28, 2015. The inspectors used definitions | The inspectors reviewed the licensee's records of reactor coolant system identified leakage for the period of July 1, 2014 through June 20, 2015 to verify the accuracy and completeness of the reported data. The inspectors observed the performance of a | ||
reactor coolant system water inventory determination in accordance with station procedure 40ST-9RC02 on September 28, 2015. The inspectors used definitions an d guidance contained in Nuclear Energy Institute Document 99-02, "Regulatory Assessment Performance Indicator Guideline," Revision 7, to determine the accuracy of the reported data. | |||
These activities constituted verification of the reactor coolant system leakage performance indicator Units 1, 2, and 3, as defined in Inspection Procedure 71151. | These activities constituted verification of the reactor coolant system leakage performance indicator Units 1, 2, and 3, as defined in Inspection Procedure 71151. | ||
| Line 207: | Line 334: | ||
====b. Findings==== | ====b. Findings==== | ||
No findings were identified. | No findings were identified. | ||
{{a|4OA2}} | {{a|4OA2}} | ||
==4OA2 Problem Identification and Resolution== | ==4OA2 Problem Identification and Resolution== | ||
(71152) | |||
===.1 Routine Review=== | ===.1 Routine Review=== | ||
====a. Inspection Scope==== | ====a. Inspection Scope==== | ||
Throughout the inspection period, the inspectors performed daily reviews of items entered into the licensee's corrective action program and periodically attended the licensee's condition report screening meetings. The inspectors verified that licensee personnel were identifying problems at an appropriate threshold and entering these problems into the corrective action program for resolution. The inspectors verified that the licensee developed and implemented corrective actions commensurate with the significance of the problems identified. The inspectors also reviewed the licensee's problem identification and resolution activities during the performance of the other inspection activities documented in this report. | Throughout the inspection period, the inspectors performed daily reviews of items entered into the licensee's corrective action program and periodically attended the licensee's condition report screening meetings | ||
. The inspectors verified that licensee personnel were identifying problems at an appropriate threshold and entering these problems into the corrective action program for resolution. The inspectors verified that the licensee developed and implemented corrective actions commensurate with the significance of the problems identified. | |||
The inspectors also reviewed the licensee's problem identification and resolution activities during the performance of the other inspection activities documented in this report. | |||
====b. Findings==== | ====b. Findings==== | ||
No findings were identified. | No findings were identified. | ||
{{a|4OA3}} | {{a|4OA3}} | ||
==4OA3 Follow-up of Events and Notices of | ==4OA3 Follow-up of Events and Notices of== | ||
NRC Event Number 51403: Notice of Unusual Event Due to Rapid Combustion of a Load Center Breaker On September 16, 2015 at 11:01PM, following routine maintenance, the licensee attempted to energize and return to service non-class load center breaker 2ENGN-L04. As the breaker was closed in it failed catastrophically. Local operators observed rapid combustion and resultant charring of the breaker enclosure and housing. The rapid combustion self-extinguished immediately following this audible and visible combustion event. As a result, control room operators | Enforcement Discretion (71153) | ||
NRC Event Number 51403: Notice of Unusual Event Due to Rapid Combustion of a Load Center Breaker On September 16, 2015 at 11:01PM, following routine maintenance, the licensee attempted to energize and return to service non-class load center breaker 2ENGN | |||
-L04. As the breaker was closed in it failed catastrophically | |||
. Local operators observed rapid combustion and resultant charring of the breaker enclosure and housing. The rapid combustion self | |||
-extinguished immediately following this audible and visible combustion event. As a result, control room operators de clared an emergency classification for notice of unusual event, the lowest of the four emergency classifications designated by the NRC, in accordance with EAL HU2.2 Explosion. The plant continued to operate at 100% power through the event with normal offsite and onsite electrical power distribution alignments. Load center breaker 2ENGN | |||
-L04 supplies power to non | |||
-essential service loads in the fuel building and has no immediate impact to plant operations or safety mitigating systems. The plant remained stable and the event did not adversely affect the safe operation of the plant or the health and safety of the public. The notice of unusual event was cleared at 4:17AM on September 17, 2015. Spent fuel movement was not in progress at the time of the event. The inspectors responded to the event to verify that the information provided by the ENS communicator was complete and accurate and no further Agency response was warranted. | |||
These activities constitute completion of one event follow | |||
-up sample, as defined in Inspection Procedure 71153. | |||
{{a|4OA6}} | {{a|4OA6}} | ||
==4OA6 Meetings, Including Exit Exit Meeting Summary On October 8, 2015, the inspectors presented the inspection results to R. Bement, and other members of the licensee staff. | ==4OA6 Meetings, Including Exit== | ||
The licensee acknowledged the issues presented. The licensee confirmed that any proprietary information reviewed by the inspectors had been returned or destroyed. | |||
===Exit Meeting Summary=== | |||
On October 8, 2015, the inspectors presented the inspection results to R. Bement, and other members of the licensee staff. The licensee acknowledged the issues presented. The licensee confirmed that any proprietary information reviewed by the inspectors had been returned or destroyed. | |||
=SUPPLEMENTAL INFORMATION= | =SUPPLEMENTAL INFORMATION= | ||
| Line 230: | Line 376: | ||
===Licensee Personnel=== | ===Licensee Personnel=== | ||
: [[contact::R. Bement]], Site VP Operations | : [[contact::R. Bement]], Site VP Operations | ||
: [[contact::M. Lacal]], Site VP Support | : [[contact::M. Lacal]], Site VP Support | ||
: [[contact::J. Cadogan]], Engineering VP | : [[contact::J. Cadogan]], Engineering VP | ||
: [[contact::C. Kharrl]], Plant Manager | : [[contact::C. Kharrl]], Plant Manager | ||
: [[contact::D. Vogt]], Unit 2 Assistant Plant Manager | : [[contact::D. Vogt]], Unit 2 Assistant Plant Manager | ||
: [[contact::G. Andrews]], Director Regulatory Affairs | : [[contact::G. Andrews]], Director Regulatory Affairs | ||
: [[contact::E. Dutton]], Nuclear Assurance Director | : [[contact::E. Dutton]], Nuclear Assurance Director | ||
: [[contact::M. McGhee]], Regulatory Compliance Section Leader | : [[contact::M. McGhee]], Regulatory Compliance Section Leader | ||
: [[contact::S. Dornsief]], Regulatory Compliance | : [[contact::S. Dornsief]], Regulatory Compliance | ||
NO DOCKET ITEMS OPENED, CLOSED, | |||
OR DISCUSSED | |||
IN THIS REPORT | |||
==LIST OF DOCUMENTS REVIEWED== | ==LIST OF DOCUMENTS REVIEWED== | ||
==Section 1R01: Adverse Weather Protection== | ==Section 1R01: Adverse Weather Protection== | ||
===Procedures=== | ===Procedures=== | ||
: Number Title Revision/Date 40AO-9ZZ21 Acts of Nature | : Number Title Revision/Date 40AO-9ZZ21 Acts of Nature | ||
: 01DP-0XX01 Control and Monitoring of Potential Tornado Borne Missiles | |||
===Condition Reports=== | ===Condition Reports=== | ||
(CRs) 15-07743 | (CRs) | ||
: 15-07743 | |||
===Miscellaneous=== | ===Miscellaneous=== | ||
: Number Title RevisionDate | : Number Title RevisionDate Updated Final Safety Analysis Report | ||
-2- | -2- | ||
| Line 256: | Line 407: | ||
===Procedures=== | ===Procedures=== | ||
: Number Title Revision/Date | : Number Title Revision/Date | ||
: 40ST-9ZZM1 Operations Mode 1 Surveillance Logs | : 40ST-9ZZM1 Operations Mode 1 Surveillance Logs | ||
: 40ST-9SI13 LPSI and CS System Alignment Verification | |||
: 73ST-9SI06 Containment Spray Pumps and Check Valves | |||
- Inservice Test 40 | |||
==Section 1R05: Fire Protection== | ==Section 1R05: Fire Protection== | ||
| Line 262: | Line 416: | ||
===Procedures=== | ===Procedures=== | ||
: Number Title Revision/Date | : Number Title Revision/Date | ||
: 30DP-9WP11 Scaffolding Instructions | : 30DP-9WP11 Scaffolding Instructions | ||
: 14OP-9FP03 Fire Protection System (Halon) | |||
: 14FT-9FP22 Halon System Inspection | |||
: 33FT-9FP03 Halon Fire Suppression System Damper Functional Test | |||
===Condition Reports=== | ===Condition Reports=== | ||
(CRs) 15-05380 15-04887 15-05014 15-04663 | (CRs) | ||
: 15-05380 15-04887 15-05014 15-04663 | |||
===Miscellaneous=== | ===Miscellaneous=== | ||
: Number Title Revision/Date | : Number Title Revision/Date | ||
: Pre-Fire Strategies Manual | : Pre-Fire Strategies Manual | ||
: PVNGS Updated FSAR | : PVNGS Updated FSAR | ||
: Installation Specification for Seismic Cat IX and Non-Seismic Scaffolding | : Installation Specification for Seismic Cat IX and Non | ||
-Seismic Scaffolding | |||
: 13-MM-0658 Fire Protection Halon System | |||
-3- | -3- | ||
==Section 1R11: Licensed Operator Requalification Program and Licensed Operator Performance Procedures Number Title Revision/Date | ==Section 1R11: Licensed Operator Requalification Program== | ||
: EP-0901 Classifications | |||
and Licensed Operator Performance | |||
===Procedures=== | |||
: Number Title Revision/Date | |||
: EP-0901 Classifications | |||
: EP0801A EAL Classification Chart | |||
: 40DP-9OP02 Conduct of Shift Operations | |||
: 40DP-9OP07 Operations Department Operating Guideline Instructions | |||
: 40DP-9OP14 Control of Operator Information Aids | |||
: 40DP-9OP15 Operator Challenges and Discrepancy Tracking | |||
: 36ST-9SA01 ESFAS Train A Subgroup Relay Functional Test | |||
===Miscellaneous=== | ===Miscellaneous=== | ||
: Number Title Revision/Date | : Number Title Revision/Date | ||
: SES-0-04-I-09 Dropped CEA/SGTR | : SES-0-04-I-09 Dropped CEA/SGTR | ||
==Section 1R12: Maintenance Effectiveness== | ==Section 1R12: Maintenance Effectiveness== | ||
===Procedures=== | ===Procedures=== | ||
: Number Title Revision/Date 70DP-0MR01 Maintenance Rule | : Number Title Revision/Date | ||
: 70DP-0MR01 Maintenance Rule | |||
===Condition Reports=== | ===Condition Reports=== | ||
(CRs) 15-07012 15-04184 15-05610 | (CRs) | ||
: 15-07012 15-04184 15-05610 | |||
===Work Orders=== | ===Work Orders=== | ||
(WOs) | (WOs) | ||
| Line 291: | Line 463: | ||
===Miscellaneous=== | ===Miscellaneous=== | ||
: Number Title Revision/Date | : Number Title Revision/Date | ||
: Palo Verde Maintenance Rule Database | : Palo Verde Maintenance Rule Database System Health Report | ||
- SA | |||
: March 18, 2015 | : March 18, | ||
: 2015 | |||
-4- | -4- | ||
| Line 300: | Line 473: | ||
===Procedures=== | ===Procedures=== | ||
: Number Title Revision/Date | : Number Title Revision/Date | ||
: 02DP-9RS01 Operational Risk Management | : 02DP-9RS01 Operational Risk Management | ||
: 40DP-9RS01 Operations Department Online Nuclear Risk Management Mode 1 and 2 | |||
: 40DP-9AP21 Protected Equipment | |||
: 51DP-9OM03-02 Emergent Work and Scope Expansion Decision Guide | |||
===Condition Reports=== | ===Condition Reports=== | ||
(CRs) 15-06090 15-06019 | (CRs) | ||
: 15-06090 15-06019 | |||
===Miscellaneous=== | ===Miscellaneous=== | ||
: Number Title Revision/Date | : Number Title Revision/Date | ||
: Scheduler's Evaluation for PV Unit 3 August 14,2015 | : Scheduler's Evaluation for PV Unit 3 | ||
: August 14,2015 | |||
: Scheduler's Risk Evaluation for PV Unit 2 | : Scheduler's Risk Evaluation for PV Unit 2 | ||
: September 9, 2015 | : September 9, | ||
: 2015 | |||
: Integrated Risk Screening Determination | : Integrated Risk Screening Determination | ||
| Line 314: | Line 493: | ||
===Procedures=== | ===Procedures=== | ||
: Number Title Revision/Date | : Number Title Revision/Date | ||
: 40DP-9OP26 Operations Condition Reporting Process and Operability Determination/Functional Assessment | : 40DP-9OP26 Operations Condition Reporting Process and Operability Determination/Functional Assessment | ||
-5- | -5- | ||
===Condition Reports=== | ===Condition Reports=== | ||
(CRs) 15-05006 15-06317 15-06289 15-06407 | (CRs) | ||
: 15-05006 15-06317 15-06289 15-06407 | |||
: 15-06618 15-06623 15-07942 14-03073 | : 15-06618 15-06623 15-07942 14-03073 | ||
: 15-06963 | : 15-06963 | ||
===Miscellaneous=== | ===Miscellaneous=== | ||
: Number Title Revision/Date | : Number Title Revision/Date | ||
: CNOA0337 Applicability of Palo Verde U2 RSG/PU CENTS base deck to PVNGS U1 and U3 RSG/PU | : CNOA0337 Applicability of Palo Verde U2 RSG/PU CENTS base deck to PVNGS U1 and U3 RSG/PU | ||
: CN-OA-04-24 PVNGS Chapter 15 CENTS base deck compilation | : CN-OA-04-24 PVNGS Chapter 15 CENTS base deck compilation | ||
: 15-05006-002 Level 3 Evaluation Report 15 | |||
-05006-002 August 20, | |||
: 2015 15-06407 Leak from HPSI pump couplings (prompt operability determination) | |||
: 4593834 Operations Decision Making Instrument: | : 4593834 Operations Decision Making Instrument: | ||
: Control Element Drive Mechanism Upper Gripper Coil Voltage and Current Data Collection in Support of | : Control Element Drive Mechanism Upper Gripper Coil Voltage and Current Data Collection in Support of CR 14 | ||
-03073 1 | |||
==Section 1R19: == | |||
: Post | |||
-Maintenance Testing | |||
===Procedures=== | ===Procedures=== | ||
: Number Title Revision/Date | : Number Title Revision/Date | ||
: 36ST-9SB02 PPS Bistable Trip Units Functional Test | : 36ST-9SB02 PPS Bistable Trip Units Functional Test | ||
: 73TI-9CH08 Charging Pump Suction Pressure Data Collection | |||
: 73ST-9CH06 Charging Pumps | |||
- Inservice Test | |||
: 36ST-9SB02 PPS Bistabl | |||
e Trip Units Functional Test | |||
: 36ST-9SB04 PPS Functional Test | |||
- RPS/ESFAS Logic | |||
===Condition Reports=== | ===Condition Reports=== | ||
(CRs) 15-05831 15-00300 15-07118 | (CRs) | ||
: 15-05831 15-00300 15-07118 | |||
===Work Orders=== | ===Work Orders=== | ||
(WOs) | (WOs) | ||
| Line 353: | Line 545: | ||
===Procedures=== | ===Procedures=== | ||
: Number Title Revision/Date | : Number Title Revision/Date | ||
: 36ST-9SB15 Supplementary Protection System Response Time Test | : 36ST-9SB15 Supplementary Protection System Response Time Test | ||
: 73ST-9EC01 Essential Chilled Water Pumps | |||
- Inservice Test | |||
: 36ST-9SA01 ESFAS Train A Subgroup Relay Functional Test | |||
: 36ST-9SB04 PPS Functional Test | |||
- RPS/ESFAS Logic | |||
: 40ST-9RC02 ERFDADS Calculation of RCS Water Inventory | |||
: 77ST-9SB17 CPCS Channel A Functional Test | |||
: 74ST-9RC02 Reactor Coolant System Specific Activity Surveillance Test | |||
: 74CH-9ZZ15 Xenon-133, Iodine | |||
-131, and RCS Total Gross Activity and Dose Equivalents | |||
: 74OP-9SS01 Primary Sampling Instrumentation | |||
===Condition Reports=== | ===Condition Reports=== | ||
(CRs) 15-04252 15-07848 | (CRs) | ||
: 15-04252 15-07848 | |||
===Work Orders=== | ===Work Orders=== | ||
(WOs) | (WOs) | ||
| Line 365: | Line 569: | ||
===Procedures=== | ===Procedures=== | ||
: Number Title Revision/Date | : Number Title Revision/Date | ||
: EP-0901 Classifications | : EP-0901 Classifications | ||
: EP-0801A EAL Classification Chart | : EP-0801A EAL Classification Chart | ||
===Miscellaneous=== | ===Miscellaneous=== | ||
: Number Title Revision/Date | : Number Title Revision/Date | ||
: SES-0-04-I-09 Dropped CEA/SGTR | : SES-0-04-I-09 Dropped CEA/SGTR | ||
-7- | -7- | ||
| Line 376: | Line 581: | ||
===Procedures=== | ===Procedures=== | ||
: Number Title Revision/Date | : Number Title Revision/Date | ||
: 40ST-9RC02 ERFDADS Calculation of RCS Water Inventory | : 40ST-9RC02 ERFDADS Calculation of RCS Water Inventory | ||
: Technical Specifications | : 74ST-9RC02 Reactor Coolant System Specific Activity Surveillance Test | ||
===Miscellaneous=== | |||
: Number Title Revision/Date | |||
: Technical Specifications | |||
: 2 | |||
: Palo Verde RCS leak rate data spreadsheet | : Palo Verde RCS leak rate data spreadsheet | ||
| Line 383: | Line 592: | ||
===Condition Reports=== | ===Condition Reports=== | ||
(CRs) 15-07489 | (CRs) | ||
: 15-07489 | |||
===Work Orders=== | ===Work Orders=== | ||
(WOs) | (WOs) | ||
: 4545213 4697058 | : 4545213 4697058 | ||
}} | }} | ||
Revision as of 18:53, 30 June 2018
| ML15295A435 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 10/22/2015 |
| From: | Miller G B NRC/RGN-IV/DRP/RPB-D |
| To: | Edington R K Arizona Public Service Co |
| Geoff Miller | |
| References | |
| IR 2015003 | |
| Download: ML15295A435 (23) | |
Text
October 22, 2015
Randall Executive Vice President, Nuclear/CNO Mail Station 7602 Arizona Public Service Company P.O Box 52034
Phoenix, Arizona 85072
-2034
SUBJECT: PALO VERDE NUCLEAR GENERATING STATION
- NRC INTEGRATED INSPECTION REPORT 05000528/2015003, 05000529/2015003, AND 05000530/2015003
Dear Mr. Edington:
On September 30, 2015
, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at the Palo Verde Nuclear Generating Station Units 1, 2, and 3
. On October 8, 2015
, the NRC inspectors discussed the results of this inspection with R. Bement and other members of your staff.
Inspectors documented the results of this inspection in the enclosed inspection report. The NRC inspectors did not identify any findings or violations of more than minor significance
. In accordance with Title 10 of the Code of Federal Regulations (10 CFR) 2.390, "Public Inspections, Exemptions, Requests for Withholding,"
a copy of this letter, its enclosure, and your response (if any) will be available electronically for public inspection in the NRC
's Public Document Room or from the Publicly Available Records (PARS) component of the NRC's Agencywide Documents Access and Management System (ADAMS).
ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading
-rm/adams.html (the Public Electronic Reading Room).
Sincerely,/RA/
Geoffrey Miller, Chief Project Branch D Division of Reactor Projects Docket Nos. 50 528, 50 529, 50 530 License Nos. NPF 41, NPF 51, NPF 74 Enclosure s: Inspection Report 05000528/201500 3, 05000529/201500 3, 05000530/201500 3 w/
Attachment:
Supplemental Information
SUNSI Review By: BH ADAMS Yes NoPublicly Available Non-Publicly Available Non-Sensitive Sensitive OFFICE DRP/SRI DRP/RI DRI/RI DRP/SPE DRS/C DRS/C NAME CPeabody DReinert DYou BHagar TFarnholtz GWerner SIGNATURE
/RA/BHagar for /RA/BHagar for /RA/BHagar for /RA/JMelfi for /RA/ /RA/ DATE 10/22/15 10/22/15 10/22/15 10/16/15 10/20/15 10/20/15 OFFICE DRS/C DRS/C DRS/C TL/TSB DRP/C NAME VGaddy MHaire HGepford ERuesch GMiller SIGNATURE
/RA/ /RA/ /RA/ /RA/ /RA/ DATE 10/19/15 10/16/15 10/16/15 10/20/15 10/21/15 Letter to from G. Miller dated October 22, 2015
SUBJECT: PALO VERDE NUCLEAR GENERATING STATION
- NRC INTEGRATED INSPECTION REPORT 05000528/2015003, 05000529/2015003, AND 05000530/2015003 DISTRIBUTION
- Regional Administrator (Marc.Dapas@nrc.gov)
Deputy Regional Administrator (Kriss.Kennedy@nrc.gov)
DRP Director (Troy.Pruett@nrc.gov)
DRP Deputy Director (Ryan.Lantz@nrc.gov)
DRS Director (Anton.Vegel@nrc.gov)
DRS Deputy Director (Jeff.Clark@nrc.gov)
Senior Resident Inspector (Charles.Peabody@nrc.gov)
Resident Inspector (Dustin.Reinert@nrc.gov)
Resident Inspector (David.You@nrc.gov)
Branch Chief, DRP/D (Geoffrey.Miller@nrc.gov)
Senior Project Engineer, DRP/D (Bob.Hagar@nrc.gov)
Project Engineer, DRP/D (Jan.Tice@nrc.gov)
Public Affairs Officer (Victor.Dricks@nrc.gov)
Public Affairs Officer (Lara.Uselding@nrc.gov)
Project Manager (Margaret.Watford@nrc.gov)
Acting Team Leader, DRS/TSS (Eric.Ruesch@nrc.gov)
RITS Coordinator (Marisa.Herrera@nrc.gov)
ACES (R4Enforcement.Resource@nrc.gov)
Regional Counsel (Karla.Fuller@nrc.gov)
Technical Support Assistant (Loretta.Williams@nrc.gov)
Congressional Affairs Officer (Jenny.Weil@nrc.gov)
Congressional Affairs Officer (Angel.Moreno@nrc.gov)
RIV/ETA: OEDO (Cindy.Rosales.Cooper@nrc.gov)
ROPreports Enclosure U.S. NUCLEAR REGULATORY COMMISSION REGION IV Docket: 05000528, 05000529, 05000530 License: NPF-41, NPF-51, NPF-74 Report: 05000528/2015003, 05000529/2015003, 05000530/2015003 Licensee:
Arizona Public Service Company Facility:
Palo Verde Nuclear Generating Station Location:
5801 South Wintersburg Road Tonopah, AZ 85354 Dates: July 1, 2015 through September 30, 2015 Inspectors:
C. Peabody, Senior Resident Inspector D. Reinert, PhD, Resident Inspector D. You, Resident Inspector Approved By: Geoffrey B. Miller Chief, Project Branch D Division of Reactor Projects
-2-
SUMMARY
IR 05000528, 529, 530/201500 2; 7/1/2015 - 9/30/2015; Palo Verde Nuclear Generating Station Units 1, 2, and 3, Integrated Inspection Report The inspection activities described in this report were performed between July 1, 2015 and September 30
, 2015, by the resident inspectors at Palo Verde Nuclear Generating Station. The NRC's program for overseeing the safe operation of commercial nuclear power reactors is described in NUREG
-1649, "Reactor Oversight Process."
No findings were identified.
PLANT STATUS
Units 1, 2, and 3 operated at 100% power for the entire inspection period.
On September 16, 2015 Unit 2 declared a Notice of Unusual Event upon the rapid combustion of a Non-Class 1E 480V load center breaker that was being returned to service following maintenance.
REPORT DETAILS
REACTOR SAFETY
Cornerstones: Initiating Events, Mitigating Systems, and Barrier Integrity
1R01 Adverse Weather Protection
.1 Readiness for Seasonal Extreme Weather Conditions
a. Inspection Scope
On September 21, 2015, the inspectors completed an inspection of the station's readiness for seasonal extreme weather conditions. The inspectors reviewed the licensee's adverse weather procedures for severe thunderstorms during the monsoon season and evaluated the licensee's implementation of these procedures. The inspectors verified that prior to the monsoon season
, the licensee had corrected weather-related equipment deficiencies identified during the previous monsoon season.
The inspectors selected a risk-significant system that w as required to be protected from severe thunderstorm and flooding
- Essential spray pond system The inspectors reviewed the licensee's procedures and design information to ensure the system would remain functional when challenged by adverse weather. The inspectors verified that operator actions described in the licensee's procedures were adequate to maintain readiness of these systems. The inspectors walked down portions of these systems to verify the physical condition of the adverse weather protection features.
These activities constitute d one sample of readiness for seasonal adverse weather
, as defined in Inspection Procedure 71111.01.
b. Findings
No findings were identified.
.2 Readiness for Impending Adverse Weather Conditions
a. Inspection Scope
On July 18, 2015 the inspectors completed an inspection of the station's readiness for impending adverse weather conditions.
The inspectors reviewed plant design features
,
the licensee's procedures to respond to tornadoes and high winds
, and the licensee's implementation of these procedures.
The inspectors evaluated operator staffing and accessibility of controls and indications for those systems required to control the plant
. These activities constitute one sample of readiness for impending adverse weather condition s, as defined in Inspection Procedure 71111.01.
b. Findings
No findings were identified.
1R04 Equipment Alignment
.1 Partial Walk
down
a. Inspection Scope
The inspectors performed partial system wa lk-downs of the following risk
-significant systems: September 9, 2015
, Unit 2 plant protection system channels and setpoints September 9, 2015, Unit 3 plant protection system channels and setpoints September 17, 2015, Unit 1 containment spray system train A The inspectors reviewed the licensee's procedures and system design information to determine the correct lineup for the systems. They visually verified that critical portions of the systems or trains were correctly aligned for the existing plant configuration
. These activities constitute d three partial system walk
-down sample s as defined i n Inspection Procedure 71111.04.
b. Findings
No findings were identified.
1R05 Fire Protection
.1 Quarterly Inspection
a. Inspection Scope
The inspectors evaluated the licensee's fire protection program for operational status and material condition. The inspectors focused their inspection on six plant areas important to safety
- July 23, 2015, Unit 1 plant computer room
, fire zone July 23, 2015, Unit 3 plant computer room, fire zone 16 July 30, 2015
, Unit 2 remote shutdown room, fire zone 10 July 30, 2015, Unit 3 remote shutdown room, fire zone 10 August 1, 2015, Unit 1 main control room, fire zone August 13, 2015, Unit 2 auxiliary building 100' east electrical penetration room fire zone 42B For each area, the inspectors evaluated the fire plan against defined hazards and defense-in-depth features in the licensee's fire protection program. The inspectors evaluated control of transient combustibles and ignition sources, fire detection and suppression systems, manual firefighting equipment and capability, passive fire protection features, and compensatory measures for degraded conditions.
These activities constitute d six quarterly inspection sample s, as defined in Inspection Procedure 71111.05.
b. Findings
No findings were identified.
1R11 Licensed Operator Requalification Program and Licensed Operator Performance
.1 Review of Licensed Operator Requalification
a. Inspection Scope
On August 8, 2015
, the inspectors observed an evaluated simulator scenario performed by an operating crew
. The inspectors assessed the performance of the operators and the evaluators' critique of their performance.
These activities constitute completion o f one quarterly licensed operator requalification program sample
, as defined in Inspection Procedure 71111.11.
b. Findings
No findings were identified.
.2 Review of Licensed Operator Performance
a. Inspection Scope
On August 29, 2015, the inspectors observed the performance of on
-shift licensed operators in the plant's main control room. At the time of the observations, the plant was in a period of heightened activity due to Engineered Safety Features Actuation System relay testing
. The inspectors observed the operators' performance of the following activities:
Pre-job briefing for operators, electricians, and instrumentation and controls technicians Relay functional test setup and prerequisites Relay testing an d expected actuation of safety features Relay testing and equipment restoration In addition, the inspectors assessed the operators' adherence to plant procedures, including the conduct of shift operations procedure, 40DP-9OP02, and other operations department policies.
These activities constitute completion of one quarterly licensed operator performance sample, as defined in Inspection Procedure 71111.11.
b. Findings
No findings were identified.
1R12 Maintenance Effectiveness
a. Inspection Scope
The inspectors reviewed two instances of degraded performance or condition of safety
-related structures, systems, and components (SSCs): September 15, 2015, Unit 3 engineered safety features actuation system failed manual actuation switches September 22, 2015
, Unit 2 diverse auxiliary feedwater system
, constant error signals due to degraded fiber optic cables The inspectors reviewed the extent of condition of possible common cause SSC failures and evaluated the adequacy of the licensee's corrective actions. The inspectors reviewed the licensee's work practices to evaluate whether these may have played a role in the degradation of the SSCs. The inspectors assessed the licensee's characterization of the degradation in accordance with 10 CFR 50.65 (the Maintenance Rule), and verified that the licensee was appropriately tracking degraded performance and conditions in accordance with the Maintenance Rule.
These activities constitute d completion of two maintenance effectiveness sample s, as defined in Inspection Procedure 71111.12.
b. Findings
No findings were identified.
1R13 Maintenance Risk Assessments and Emergent Work Control
a. Inspection Scope
On September 9, 2015, the inspectors reviewed the weekly risk assessment for Unit 2. This risk assessment is performed by the licensee prior to changes in plant configuration and the risk management actions taken by the licensee in response to elevated risk.
The inspectors verified that this risk assessment was performed timely and in accordance with the requirements of 10 CFR 50.65 (the Maintenance Rule) and plant procedures. The inspectors reviewed the accuracy and completeness of the licensee's risk assessment and verified that the licensee implemented appropriate risk management actions based on the result of the assessment.
Additionally on August 14, 2015, the inspectors also observed portions of emergent work to repair a 4-way nitrogen supply valve to main steam isolation valve 181.
This emergent work activit y that had the potential to cause an initiating event, or to affect the functional capability of mitigating systems
.
The inspectors verified that the licensee appropriately developed and followed a work plan for th is activity. The inspectors verified that the licensee took precautions to minimize the impact of the work activit y on unaffected structures, systems, and components (SSCs).
These activities constitute completion of two maintenance risk assessments and emergent work control inspection samples
, as defined in Inspection Procedure 71111.13.
b. Findings
No findings were identified.
1R15 Operability Determinations
and Functionality Assessments (71111.15)
a. Inspection Scope
The inspectors reviewed five operability determinations and functionality assessments that the licensee performed for degraded or nonconforming structures, systems, or components (SSCs):
August 27, 2015, operability determination of Unit 2 control element assembly
- 88 upper gripper coil current noise August 31, 2015
, operability determination of the steam generators due to revised input parameters used for UFSAR Chapter 15 accident analysis September 10, 2015, functionality assessment of Unit 2 train A essential cooling water radiation monitor following failed source check September 23, 2015, operability determination of Unit 1 high pressure safety injection pump B oil leakage September 24, 2015
, functionality assessment of Unit 3 reactor coolant pump D circuit breaker half trip The inspectors reviewed the timeliness and technical adequacy of the licensee's evaluations. Where the licensee determined the degraded SSC to be operable or functional, the inspectors verified that the licensee's compensatory measures were appropriate to provide reasonable assurance of operability or functionality. The inspectors verified that the licensee had considered the effect of other degraded conditions on the operability or functionality of the degraded SSC
.
These activities constitute completion of five operability and functionality review samples, as defined in Inspection Procedure 71111.15.
b. Findings
No findings were identified.
1R19 Post-Maintenance
Testing (71111.19)
a. Inspection Scope
The inspectors reviewed five post-maintenance testing activities that affected risk
-significant structures, systems, or components (SSCs):
August 17, 2015
, Unit 1 bistable comparator car d for high-high containment pressure channel D alarm August 11, 2015, Unit 2 charging pump A post maintenance test after conducting a test instruction August 26, 2015, Unit 3 bistable comparator card for high
-high containment pressure channel D alarm September 2, 2015, Unit 1 auxiliary feedwater actuation system switch replacemen t September 9, 2015, Unit 2 safety injection valve #676 circuit breaker contact replacement
The inspectors reviewed licensing- and design
-basis documents for the SSCs and the maintenance and post-maintenance test procedures.
The inspectors observed the performance of the post
-maintenance tests to verify that the licensee performed the tests in accordance with approved procedures, satisfied the established acceptance criteria, and restored the operability of the affected SSCs.
These activities constitute completion of five post-maintenance testing inspection samples, as defined in Inspection Procedure 71111.19.
b. Findings
No findings were identified.
1R22 Surveillance Testing
a. Inspection Scope
The inspectors observed eight risk-significant surveillance tests and reviewed test results to verify that these tests adequately demonstrated that the structures, systems, and components (SSCs) were capable of performing their safety functions:
In-service test s: August 20, 2015
, Unit 2 essential chill ed water pump B Reactor coolant system leak detection tests: September 28, 2015, Unit 2 reactor coolant system water inventory calculation
Other surveillance tests:
July 9, 2015, Unit 3 core protection calculator channel A functional test July 14, 2015
, Unit 2 supplementary protection system channel A response time testing August 1, 2015, Unit 3 reactor coolant system specific activity testing August 19, 2015, Unit 2 plant protection system channel A functional test August 29, 2015, Unit 2 engineered safety features actuation system train A subgroup relay functional testing September 25, 2015, Unit 3 safety injection tank narrow range level verifications
The inspectors verified that these test s met technical specification requirements, that the licensee performed the tests in accordance with their procedures, and that the results of the test satisfied appropriate acceptance criteria. The inspectors verified that the licensee restored the operability of the affected SSCs following testing.
These activities constitute completion of eight surveillance testing inspection sample s, as defined in Inspection Procedure 71111.22.
b. Findings
No findings were identified.
Cornerstone:
1EP6 Drill Evaluation
.1 Training Evolution Observation
a. Inspection Scope
On August 8, 2015
, the inspectors observed simulator
-based licensed operator requalification training that included implementation of the licensee's emergency plan.
The inspectors verified that the licensee's emergency classifications, off
-site notifications, and protective action recommendations were appropriate and timely. The inspectors verified that any emergency preparedness weaknesses were appropriately identified by the evaluators and entered into the corrective action program for resolution.
These activities constitute completion of one training observation sample, as defined in Inspection Procedure 71114.06.
b. Findings
No findings were identified.
OTHER ACTIVITIES
Cornerstones: Initiating Events, Mitigating Systems, Barrier Integrity, Emergency Preparedness, Public Radiation Safety, Occupational Radiation Safety, and Security
4OA1 Performance Indicator Verification
.1 Reactor Coolant System Specific Activity (BI01)
a. Inspection Scope
The inspectors reviewed the licensee's reactor coolant system chemistry sample analyses for the period of July 1, 2014 through June 30, 2015 to verify the accuracy and completeness of the reported data. The inspectors observed a chemistry technician obtain and analyze a reactor coolant system sample on August 1, 2015. The inspectors used definitions and guidance contained in Nuclear Energy Institute Document 99-02, "Regulatory Assessment Performance Indicator Guideline," Revision 7, to determine the accuracy of the reported data.
These activities constituted verification of the reactor coolant system specific activity performance indicator Units 1, 2, and 3, as defined in Inspection Procedure 71151.
b. Findings
No findings were identified.
.11 Reactor Coolant System
Identified Leakage (BI02)
a. Inspection Scope
The inspectors reviewed the licensee's records of reactor coolant system identified leakage for the period of July 1, 2014 through June 20, 2015 to verify the accuracy and completeness of the reported data. The inspectors observed the performance of a
reactor coolant system water inventory determination in accordance with station procedure 40ST-9RC02 on September 28, 2015. The inspectors used definitions an d guidance contained in Nuclear Energy Institute Document 99-02, "Regulatory Assessment Performance Indicator Guideline," Revision 7, to determine the accuracy of the reported data.
These activities constituted verification of the reactor coolant system leakage performance indicator Units 1, 2, and 3, as defined in Inspection Procedure 71151.
b. Findings
No findings were identified.
4OA2 Problem Identification and Resolution
(71152)
.1 Routine Review
a. Inspection Scope
Throughout the inspection period, the inspectors performed daily reviews of items entered into the licensee's corrective action program and periodically attended the licensee's condition report screening meetings
. The inspectors verified that licensee personnel were identifying problems at an appropriate threshold and entering these problems into the corrective action program for resolution. The inspectors verified that the licensee developed and implemented corrective actions commensurate with the significance of the problems identified.
The inspectors also reviewed the licensee's problem identification and resolution activities during the performance of the other inspection activities documented in this report.
b. Findings
No findings were identified.
4OA3 Follow-up of Events and Notices of
Enforcement Discretion (71153)
NRC Event Number 51403: Notice of Unusual Event Due to Rapid Combustion of a Load Center Breaker On September 16, 2015 at 11:01PM, following routine maintenance, the licensee attempted to energize and return to service non-class load center breaker 2ENGN
-L04. As the breaker was closed in it failed catastrophically
. Local operators observed rapid combustion and resultant charring of the breaker enclosure and housing. The rapid combustion self
-extinguished immediately following this audible and visible combustion event. As a result, control room operators de clared an emergency classification for notice of unusual event, the lowest of the four emergency classifications designated by the NRC, in accordance with EAL HU2.2 Explosion. The plant continued to operate at 100% power through the event with normal offsite and onsite electrical power distribution alignments. Load center breaker 2ENGN
-L04 supplies power to non
-essential service loads in the fuel building and has no immediate impact to plant operations or safety mitigating systems. The plant remained stable and the event did not adversely affect the safe operation of the plant or the health and safety of the public. The notice of unusual event was cleared at 4:17AM on September 17, 2015. Spent fuel movement was not in progress at the time of the event. The inspectors responded to the event to verify that the information provided by the ENS communicator was complete and accurate and no further Agency response was warranted.
These activities constitute completion of one event follow
-up sample, as defined in Inspection Procedure 71153.
4OA6 Meetings, Including Exit
Exit Meeting Summary
On October 8, 2015, the inspectors presented the inspection results to R. Bement, and other members of the licensee staff. The licensee acknowledged the issues presented. The licensee confirmed that any proprietary information reviewed by the inspectors had been returned or destroyed.
SUPPLEMENTAL INFORMATION
KEY POINTS OF CONTACT
Licensee Personnel
- J. Cadogan, Engineering VP
- C. Kharrl, Plant Manager
- D. Vogt, Unit 2 Assistant Plant Manager
- G. Andrews, Director Regulatory Affairs
- E. Dutton, Nuclear Assurance Director
- M. McGhee, Regulatory Compliance Section Leader
- S. Dornsief, Regulatory Compliance
NO DOCKET ITEMS OPENED, CLOSED,
OR DISCUSSED
IN THIS REPORT
LIST OF DOCUMENTS REVIEWED
Section 1R01: Adverse Weather Protection
Procedures
- Number Title Revision/Date 40AO-9ZZ21 Acts of Nature
- 01DP-0XX01 Control and Monitoring of Potential Tornado Borne Missiles
Condition Reports
(CRs)
- 15-07743
Miscellaneous
- Number Title RevisionDate Updated Final Safety Analysis Report
-2-
Section 1R04: Equipment Alignment
Procedures
- Number Title Revision/Date
- 40ST-9ZZM1 Operations Mode 1 Surveillance Logs
- 40ST-9SI13 LPSI and CS System Alignment Verification
- 73ST-9SI06 Containment Spray Pumps and Check Valves
- Inservice Test 40
Section 1R05: Fire Protection
Procedures
- Number Title Revision/Date
- 30DP-9WP11 Scaffolding Instructions
- 14OP-9FP03 Fire Protection System (Halon)
- 14FT-9FP22 Halon System Inspection
- 33FT-9FP03 Halon Fire Suppression System Damper Functional Test
Condition Reports
(CRs)
- 15-05380 15-04887 15-05014 15-04663
Miscellaneous
- Number Title Revision/Date
- Pre-Fire Strategies Manual
- Installation Specification for Seismic Cat IX and Non
-Seismic Scaffolding
- 13-MM-0658 Fire Protection Halon System
-3-
Section 1R11: Licensed Operator Requalification Program
and Licensed Operator Performance
Procedures
- Number Title Revision/Date
- EP-0901 Classifications
- EP0801A EAL Classification Chart
- 40DP-9OP02 Conduct of Shift Operations
- 40DP-9OP07 Operations Department Operating Guideline Instructions
- 40DP-9OP14 Control of Operator Information Aids
- 40DP-9OP15 Operator Challenges and Discrepancy Tracking
- 36ST-9SA01 ESFAS Train A Subgroup Relay Functional Test
Miscellaneous
- Number Title Revision/Date
- SES-0-04-I-09 Dropped CEA/SGTR
Section 1R12: Maintenance Effectiveness
Procedures
- Number Title Revision/Date
- 70DP-0MR01 Maintenance Rule
Condition Reports
(CRs)
- 15-07012 15-04184 15-05610
Work Orders
(WOs)
- 4559074
- 3044837
Miscellaneous
- Number Title Revision/Date
- Palo Verde Maintenance Rule Database System Health Report
- SA
- March 18,
- 2015
-4-
Section 1R13: Maintenance Risk Assessments and Emergent Work Control
Procedures
- Number Title Revision/Date
- 02DP-9RS01 Operational Risk Management
- 40DP-9RS01 Operations Department Online Nuclear Risk Management Mode 1 and 2
- 40DP-9AP21 Protected Equipment
- 51DP-9OM03-02 Emergent Work and Scope Expansion Decision Guide
Condition Reports
(CRs)
- 15-06090 15-06019
Miscellaneous
- Number Title Revision/Date
- Scheduler's Evaluation for PV Unit 3
- August 14,2015
- Scheduler's Risk Evaluation for PV Unit 2
- September 9,
- 2015
- Integrated Risk Screening Determination
Section 1R15: Operability Determinations and Functionality Assessments
Procedures
- Number Title Revision/Date
- 40DP-9OP26 Operations Condition Reporting Process and Operability Determination/Functional Assessment
-5-
Condition Reports
(CRs)
- 15-05006 15-06317 15-06289 15-06407
- 15-06618 15-06623 15-07942 14-03073
- 15-06963
Miscellaneous
- Number Title Revision/Date
- CNOA0337 Applicability of Palo Verde U2 RSG/PU CENTS base deck to PVNGS U1 and U3 RSG/PU
- CN-OA-04-24 PVNGS Chapter 15 CENTS base deck compilation
- 15-05006-002 Level 3 Evaluation Report 15
-05006-002 August 20,
- 2015 15-06407 Leak from HPSI pump couplings (prompt operability determination)
- 4593834 Operations Decision Making Instrument:
- Control Element Drive Mechanism Upper Gripper Coil Voltage and Current Data Collection in Support of CR 14
-03073 1
Section 1R19:
- Post
-Maintenance Testing
Procedures
- Number Title Revision/Date
- 36ST-9SB02 PPS Bistable Trip Units Functional Test
- 73TI-9CH08 Charging Pump Suction Pressure Data Collection
- 73ST-9CH06 Charging Pumps
- Inservice Test
- 36ST-9SB02 PPS Bistabl
e Trip Units Functional Test
- 36ST-9SB04 PPS Functional Test
- RPS/ESFAS Logic
Condition Reports
(CRs)
- 15-05831 15-00300 15-07118
Work Orders
(WOs)
- 4494367
- 4690280
- 4618102
- 4686201
- 4525859
- 4694614
- 4694617
- 4694755
- 4701173
-6-
Section 1R22: Surveillance Testing
Procedures
- Number Title Revision/Date
- 36ST-9SB15 Supplementary Protection System Response Time Test
- 73ST-9EC01 Essential Chilled Water Pumps
- Inservice Test
- 36ST-9SA01 ESFAS Train A Subgroup Relay Functional Test
- 36ST-9SB04 PPS Functional Test
- RPS/ESFAS Logic
- 40ST-9RC02 ERFDADS Calculation of RCS Water Inventory
- 77ST-9SB17 CPCS Channel A Functional Test
- 74ST-9RC02 Reactor Coolant System Specific Activity Surveillance Test
- 74CH-9ZZ15 Xenon-133, Iodine
-131, and RCS Total Gross Activity and Dose Equivalents
- 74OP-9SS01 Primary Sampling Instrumentation
Condition Reports
(CRs)
- 15-04252 15-07848
Work Orders
(WOs)
- 4510586
- 4521209 4685752
Section 1EP6: Drill Evaluation
Procedures
- Number Title Revision/Date
- EP-0901 Classifications
Miscellaneous
- Number Title Revision/Date
- SES-0-04-I-09 Dropped CEA/SGTR
-7-
Section 4OA1: Performance Indicator Verification
Procedures
- Number Title Revision/Date
- 40ST-9RC02 ERFDADS Calculation of RCS Water Inventory
- 74ST-9RC02 Reactor Coolant System Specific Activity Surveillance Test
Miscellaneous
- Number Title Revision/Date
- Technical Specifications
- 2
- Palo Verde RCS leak rate data spreadsheet
Section 4OA3: Follow-up of Events and Notices of Enforcement Discretion
Condition Reports
(CRs)
- 15-07489
Work Orders
(WOs)
- 4545213 4697058