CNL-14-119, the Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project - July 2014 Status Report

the Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project - July 2014 Status Report

ML14212A748
Person / Time
Site:	Browns Ferry, Watts Bar, Sequoyah
Issue date:	07/31/2014
From:	James Shea Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
CNL-14-119, L44 140731 001
Download: ML14212A748 (15)

Text

L44 140731 001 Tennessee Valley Authority, 1101 Market Street, Chattanooga , Tennessee 37402 CNL-14-119 July 31 , 2014 10 CFR 50.4 ATTN : Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Browns Ferry Nuclear Plant, Units 1, 2, and 3 Facility Operating License Nos. DPR-33, DPR-52, and DPR-68 NRC Docket Nos. 50-259, 50-260, and 50-296 Sequoyah Nuclear Plant, Units 1 and 2 Facility Operating License Nos. DPR-77 and DPR-79 NRC Docket Nos. 50-327 and 50-328 Watts Bar Nuclear Plant, Unit 1 Facility Operating License No. NPF-90 NRC Docket No. 50-390

Subject:

The Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- July 2014 Status Report

Reference:

1. TVA letter to NRC , "Additional Information Regarding March 28, 2013, Public Meeting With NRC Regarding The Tennessee Valley Authority's (TVA)

Commercial Grade Dedication Recovery Project," dated April 30, 2013 (ML13123A163)

2. TVA letter to NRC, "The Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project Plan - July 2013 Status Report," dated July 31 , 2013 (ML13220A102)

3. TVA letter to NRC , "The Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- October 2013 Status Report," dated October 31, 2013 (ML13309A747)

4. TVA letter to NRC, "The Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- January 2014 Status Report," dated January 31, 2014 (ML14038A139)

Nuclear Regulatory Commission Page2 July 31, 2014

5. TVA letter to NRC, "The Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- April 2014 Status Report," dated April 30, 2014 (ML14126A843)

The purpose of this letter is to provide the Nuclear Regulatory Commission (NRC) staff with the July 2014 Commercial Grade Dedication Recovery Project Status Report. Previous reports were provided in References 2, 3, 4,and 5.

In Enclosure 2 of the Reference 1 letter, TVA provided the NRC with a TVA Nuclear Power Group Commercial Grade Dedication Recovery Project Action Plan Summary that included Commercial Grade Dedication Recovery Project Milestones. In Milestone 4, TVA stated that quarterly updates would be provided to the NRC starting in July 2013 and that the updates would include any failures found in either the installed equipment review or warehouse inventory review along with an evaluation of safety significance of such failures for the installed items.

Based on progress made to date, the TVA Nuclear Power Group Commercial Grade Dedication Recovery Project is on track to meet the December 2014 commitment date for project completion. In addition, no issues have been identified that resulted in declaring plant equipment to be inoperable.

The enclosure to this letter provides the TVA Nuclear Power Group Commercial Grade Dedication Recovery Project- July 2014 Status Report.

There are no new regulatory commitments contained in this letter. Should you have any questions, please contact John Laffrey at (423) 751-3262.

Respectfully, J. W. Shea Vice President, Nuclear Licensing

Enclosure:

Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- July 2014 Status Report cc:

NRC Regional Administrator- Region II NRC Senior Resident Inspector- Browns Ferry Nuclear Plant NRC Senior Resident Inspector- Sequoyah Nuclear Plant NRC Senior Resident Inspector- Watts Bar Nuclear Plant NRR Project Manager - Browns Ferry Nuclear Plant NRR Project Manager - Sequoyah Nuclear Plant NRR Project Manager- Watts Bar Nuclear Plant

ENCLOSURE Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- July 2014 Status Report INTRODUCTION:

During a public meeting with the Nuclear Regulatory Commission (NRC) staff on March 28, 2013, TVA described a broad set of actions being taken by the TVA Nuclear Power Group (NPG) to address commercial grade dedication (CGD) program issues identified by the NRC in Watts Bar Unit 2 construction-related Integrated Inspection Report 05000391/2011607, dated September30, 2011, and Integrated Inspection Report05000391/2011610, dated February 3, 2012. To further address commercial grade dedication program issues, TVA made a commitment to complete a comprehensive evaluation of commercial grade dedication items installed between September 1995 and November 2011 for the operating fleet, and correct any identified deficiencies by December 31, 2014.

In a letter to the NRC dated July 1, 2013, 1 TVA informed the staff that TVA Nuclear Power Group Commercial Grade Dedication Recovery Project Plan was approved for implementation and briefly described the plan. The CGD Recovery Project Plan describes the evaluation process being used to determine whether an adequate basis exists, is documented, and provides reasonable assurance that a commercial grade item to be used as a basic component will perform its intended safety function. The plan establishes the scope of the project, identifies the number of specific items that must be evaluated, and describes the grouping of items for evaluation by type, supplier, and time frame of procurement. The plan also describes documentation that TVA will generate during the evaluation process for items that are installed and/or currently in inventory; for items that are obsolete and through regular preventive maintenance are no longer installed in safety related applications; and for inventory items that have not been purchased or installed since Part 21, Reporting of Defects and Noncompliances, of the Code of Federal Regulations was amended in 1995.

From April2013 to April2014, the CGD Recovery Project Team identified 22,340 unique Catalog Identifiers (CATIDs) that have been generated for CGD items across the TVA Nuclear Power Group Fleet since September 1995. Of this population, 17,343 unique CATIDs have been identified to be either not purchased or not installed. Therefore, the remaining 4,997 unique CATIDs have been either purchased or installed in a TVA nuclear plant and will require evaluation, as described in the CGD Recovery Project Plan.

The CGD Recovery Project is evaluating the unique CATIDs in groups where possible. In many cases, several CGD packages have been generated for the same unique CATID due to the number of years of plant operations under evaluation.

The status provided below documents the progress to date based on accounting for the applicable number of unique CATIDs.

PROGRESS TO DATE:

As of April 4, 2014, the TVA CGD Recovery Project Weekly Report indicated that from a population of 17,343 CATIDs that were either not purchased or not installed, 17,343 CATIDs have been verified via an additional data search to not exist in inventory or in the operating units. This completes the verification and documentation of CATIDs that were either not purchased or not installed.

1 TVA letter to NRC, "The Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project Plan," dated July 1, 2013 (ML13189A133)

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ENCLOSURE Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- July 2014 Status Report From the population of CATIDs that were purchased and are either in inventory or installed, there were 654 CATIDs evaluated and dispositioned since the April 2014 Status Report. As of July 14, 2014, the TVA CGD Recovery Project Weekly Report indicated that from a population of 4,997 CATIDs that were purchased and are either in inventory or installed, 4367 CATIDs have been assessed against project plan review criteria, including the critical characteristics for acceptance (CCA), and were found to be acceptable. Of the remaining 630 CATIDs, there are 183 that require testing or analyses and 447 that have been assessed against project plan review criteria, including the CCA, and were found to be acceptable with the exception of seismic CCA information.

During the effort to evaluate commercially dedicated parts against the applicable CCA, an additional gap was identified where critical characteristics to confirm seismic qualification/suitability were not adequately documented. This gap can be characterized as failing to adequately document the equipment seismic/structural qualification of the replacement items in accordance with TVA Nuclear Engineering Department seismic procedures and design standards.

The April4, 2014, TVA CGD Recovery Project Weekly Report identified 54 CATIDs that were assessed against project plan review criteria and found to be acceptable for applicable critical characteristics for acceptance with the exception of seismic CCA information. Since April 2014, 393 additional CATIDs have been assessed against project plan review criteria and found to be acceptable for applicable critical characteristics for acceptance with the exception of seismic CCA information. Therefore, the TVA CGD Project has identified 447 CATIDs that require additional assessment of seismic CCA information. The assessment of seismic CCA information for seismic sensitive CATIDs is ongoing. Additional actions and resources are being applied to address the additional scope of seismic CCA information, and TVA currently expects to meet the original project completion commitment date of December 31, 2014.

Based on the progress made to date, there are 630 CATIDs remaining for evaluation and/or disposition. The TVA CGD Recovery Project is progressing as planned and scheduled.

UPDATE ON PREVIOUSLY IDENTIFIED ISSUES:

The status of previously identified testing failures is summarized in the Table below.

Initial Status SRJPER CATID Item Failure Disposition Status Report Date Number Description Description (Open/

Closed)

July 31,2013 SR 755044 CAE345C Overload Failed current Purchased new heaters for Closed (PER 762570) Heaters carrying due to testing to revised criteria.

incorrect test All items passed testing.

current July 31, 2013 SR 755092 BKG441M 1-1/4 Inch Failed Used three point Closed (PER 762593) Copper dimensional test - measurement technique &

Couplings use of single additional analyses to measurement accept Items.

point October 31, 2013 PER 793398 BDH517E Fuses Failed current Based on EPRI TR- Closed PER 826788 20A, 250V clearing testing by 017218, Revision 1, Time Delay 25% longer than Guideline for Sampling in criteria. the Commercial-Grade Item Acceptance Process, the remaininQ inventory E 2 of 13

ENCLOSURE Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- July 2014 Status Report Initial Status SRJPER CATID Item Failure Disposition Status Report Date Number Description Description (Open/

Closed) was scrapped. No record of safety related (SR) application was identified.

However, if installed in SR application, the 25% longer clearing time would not degrade the component function during accident scenarios.

October31, 2013 PER 794799 BXA282G Pressure Failed acceptance Defective pressure switch Closed PER 821184 Switch criteria for was scrapped.

configuration, operating response, repeatability, and weight October 31, 2013 PER 793399 CKA398K Brass Tubing Failed threading Installed fitting acceptable Closed PER 821992 Tee Fittings testing based on completed conditional dedication.

October 31, 2013 PER 784385 CKJ806N Hydraulic Failed flash point Revised flash point criteria Closed PER 793529 Fluid test to lower value. Material PER 828658 acceptable for end use applications.

January 31, 2014 PER 827195 CRE543B Breather Failed testing Material dispositioned as Closed Caps criteria for material acceptable with no effect type on operability.

January 31, 2014 PER 827194 CRF195B Vent Caps Failed testing Material dispositioned as Closed criteria for material acceptable with no effect and dimension on operability. Additional dimensional inspection designated for this item.

January 31, 2014 PER 821151 BJV743J Overload Failed testing Failed criteria Closed Heaters criteria for inconsequential to overload resistance and heater operation. Pre-dimensions installation testing verifies proper operation.

January 31, 2014 PER 826067 BVT390J Cable Splices Failed testing Deficient parts would have Closed criteria for wire been self-revealing during size dimensions installation. Material will be scrapped.

January 31, 2014 PER 826791 AWT096Y Fuses Failed testing 1 of 30 fuses tested did not Closed 0.125A criteria for current meet current carrying carrying capacity capability - fuse opened before thermal stability was reached. If installed, this fuse would have likely failed during normal operation and/or surveillance testing.

The failure would be self-revealing.

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ENCLOSURE Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- July 2014 Status Report January 31, 2014 PER 828735 BAG502L Fuses Failed testing Test results reviewed and Closed 1.6A criteria for current accurate. No record of clearing time safety related (SR) application was identified.

Work orders initiated to replace non-safety related applications. Remaining inventory scrapped per EPRI TR-017218, Revision 1, guidance.

January 31, 2014 PER 830725 BVC946R Terminal Failed testing Based on new information, Closed Lugs criteria for material item meets manufacturer's type specifications.

Manufacturing process involves copper barrel material and brass spade material. Mixed material manufacturing was not apparent based on initial review of product data sheets.

January 31, 2014 PER 830726 BYB188W Terminal Failed testing Test method revised based Closed Lugs criteria for material on manufacturer's type specifications. Material retested and verified to meet criteria. Material acceptable to revised package.

January 31,2014 PER 823813 BYM865Q Terminal Failed testing Revised material attributes Closed Lugs criteria for material for copper concentration type and item found acceptable.

January 31,2014 PER 825115 CFF597C Polyethylene Failed testing Retested tubing to proper Closed Tubing criteria for test pressure and found pressure integrity acceptable.

January 31,2014 PER 826424 BYL296B Insulating Failed testing Initial criteria not critical. Closed Tape criteria for tensile Revised criteria and strength retested for tape thickness and di-electric strength.

Item found acceptable.

January 31,2014 PER 820855 CCA611R Pulley Failed testing Incorrect material specified Closed Bushings criteria for material based on current type manufacturing. Material acceptable to originally supplied material type.

January 31, 2014 PER 825131 BQX704E Mandrel Pop Failed testing Incorrect material specified Closed Rivets criteria for material for mandrel. Revised type material type and tested additional samples for acceptance.

January 31, 2014 PER 823816 CPV360D Cable Splices Failed testing Package revised to test Closed criteria for material material to the applicable type ASTM standard versus providing minimum copper content for material type.

Material tested to more specific criteria and found acceptable.

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ENCLOSURE Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- July 2014 Status Report January 31,2014 PER 828659 CEH294T Pressure Failed testing Incorrect data sheet in Closed Switch criteria for weight package. Revised package to include correct data sheet.

January 31, 2014 PER 823818 BRN013X Resistors Failed testing Incorrect dimensional Closed criteria for tolerances applied.

dimensions Revised CGD package and amended dimensional test report for acceptance.

January 31, 2014 PER 824184 CFP436V Brass Tubing Failed testing Revised criteria to brass Closed Unions criteria for material alloy. A brass alloy plus type pressure testing supported acceptance.

January 31, 2014 PER 821083 CGX850P Brass Tubing Failed testing Revised criteria to brass Closed Unions criteria for material alloy. A brass alloy plus type pressure testing supported acceptance.

April 30, 2014 PER 845971 CFB485C HFA Relay Failed seismic Evaluate and document Open criteria resolution of the non-conformance of 18 HFA relays.

April 30, 2014 PER 842727 BVT503M Resistor Failed Error occurred when Closed dimensional selecting the critical criteria characteristic dimension for resistor length and lead length. Resistors passed revised criteria.

Apri130, 2014 PER 842713 BLA352D 30 Amp Fuse Failed current Expanded sample testing Closed clearing time per EPRI TR-017218, Revision 1, resulted in acceptance of the fuse lot.

April30, 2014 PER 842712 BLA345A 200 Amp Failed current Expanded sample testing Closed Fuse clearing time per EPRI TR-017218, Revision 1, resulted in acceptance of the fuse lot.

Apri130, 2014 PER 842728 CFD755Y 35Ampfuse Failed current Incorrect criteria initially Closed clearing time specified. PEG Package revised. Additional testing provided acceptable results.

April 30, 2014 PER 842703 BWA522 1.8 Failed leakage Expanded sample testing Closed w microfarad current and per EPRI TR-017218, Capacitor working voltage Revision 1, resulted in acceptance of the capacitor lot.

April 30, 2014 PER 853916 CAC064M Resistor Failed Incorrect tolerance revised. Closed dimensional Test report amended criteria resulting in acceptance of the resistor lot.

April 30, 2014 PER 842702 APD135T Access Valve Failed Dimensional criteria revised Closed dimensional based on end use criteria considerations. Re-inspection of entire lot to revised criteria resulted in acceptance of the lot.

April 30, 2014 PER 860042 ADM954A 35Amp Failed current No material installed. Closed Fuses clearing time Remaining material scrapped to prevent issue to the plant.

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ENCLOSURE Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- July 2014 Status Report Apri130, 2014 PER 845579 BLN398N #22AWGto Failed Inspection verified a mixed Closed

1. 14AWG measurement bin of material. 100%

Splice indicating a mixed inspection performed to bin (reducing 22 remove deficient material AWGto 14AWG and scrap. Remaining splice and non- material sent to lab for reducing 14 AWG physical inspection.

to 14 AWG splice mixed together).

April30,2014 PER 842128 CVD369R Exhaust Failed volumetric Evaluate test results to Open Valves flow rate determine potential operability impact on four components with higher exhaust rate requirements than the test results.

Apri130, 2014 PER 862599 CFM395R Sleeve Fitting Failed Incorrect dimensional Closed dimensional tolerances specified and criteria dimensions recorded beyond significant digits.

Material re-inspected to correct dimensional tolerances and accepted.

April30,2014 PER 844628 CAA979N Overload Failed contact The failure occurred during Closed Relay resistance - open . testing and failed as "open" circuit contact, therefore, the relay is no longer viable for use.

This condition would be self revealing during the installation and testing process. Initially, a quantity of 10 relays from the lot of 19 were tested, with one resulting failure. Based on the one failure, the entire lot will be tested.

April 30, 2014 PER 841713 CGJ609B Resistor Failed The resistor length and Closed PER 892013 dimensional lead length dimensional criteria deficiencies were found acceptable.

April30,2014 PER 848255 BYL400P 8Amp Fuse Failed Material found acceptable Closed dimensional based on new tolerance criteria information. CGD documents revised and material accepted.

Apri130, 2014 PER845243 CBB278A Resistor Failed power Remaining material was Open rating of resistor scrapped to prevent issue to the plant. The resistors are normally used in panel light indicators, where the resistors drop the circuit voltage to a value appropriate for the indicating lamp. Evaluate test results and determine purchasing and testing options, and review purchase order issue history and work orders.

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ENCLOSURE Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- July 2014 Status Report April 30, 2014 PER 867205 BVA247Y 7.5Amp Fuse Failed current Expanded sample testing, Open clearing time per EPRI TR-017218-R1, resulted in an additional fuse failing acceptance criteria. PER 891992 was issued to document and evaluate issue. Evaluate issue history for material installed in safety related applications, and review test report acceptance criteria/procurement document revisions, or disposition failed material.

April30, 2014 PER 867221 BDL448P 700Amp Failed current New acceptance criteria Closed Fuse clearing time established based on UL 248-1. Expanded sample testing per EPRI TR-017218, Revision 1, resulted in acceptance of the fuse lot.

April30, 2014 PER 867220 BYF689H 15Amp Fuse Failed current Expanded sample testing Closed clearing time per EPRI TR-017218, Revision 1, resulted in acceptance of the fuse lot.

April 30, 2014 PER 863778 BYV699G 0.5Amp Fuse Failed current Four of 30 fuses failed the Open clearing time clearing time requirement by failing to open within the timing criteria. Condition is being evaluated for testing criteria and testing options.

RECENTLY IDENTIFIED ISSUES:

The following testing failures were recently identified and entered into the corrective action program:

Problem Evaluation Report 842729 was initiated to identify and address failure of critical characteristic testing criteria for material of check valves (CATID CHB326L). The material acceptance criterion was specified as copper 84.0-86.0% max and tin 4.0-6.0% max. Of three check valves in inventory, one valve was destructively tested and failed to meet the .

acceptance criteria with failure values at 87.5% copper (body) and 87.1% copper (bonnet). A review of previously issued inventory was performed, identifying no check valves issued and installed in safety related applications. Subsequent review of the item determined that the end use was reclassified as Quality Related, with TIIC CTP902M specified as the replacement. In accordance with the corrective action plan, TIIC CHB326L was cancelled and material designated to be scrapped as a result of the evaluation.

Problem Evaluation Report 882147 was initiated to identify and address failure of initial critical characteristic testing criteria for current clearing time of 4 amp fuses (CATID BLR987K). In the initial test, the current clearing time acceptance criterion incorrectly specified that with a test circuit consisting of 8 amps (+1 0/-0%), the fuse shall blow in no longer than 4 minutes. Of eleven fuses in inventory, seven fuses were tested. Two fuses failed to meet the acceptance criteria with failure values at 352.93 and 271.23 seconds. Based on discussions with the manufacturer, the acceptance criteria was revised to specify that with a test circuit consisting of E 7 of 13

ENCLOSURE Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- July 2014 Status Report 12 amps(+/- 20%), the fuse shall blow in 0.02 to 45 seconds. Seven additional fuses were tested in accordance with the revised CGD package with acceptable results. The material was evaluated as acceptable based on the revised test results and revision to the CGD documents.

The fuses (CATID BLR987K) were released from "Hold" status.

Problem Evaluation Report 899140 was initiated to identify and address failure of critical characteristic testing criteria for current carrying capacity of 200 amp fuses (CATID ARB566W).

The current carrying capacity test applies 200 amps (+10/-0%), until the fuse is thermally stable.

Temperature stabilization has occurred when no individual temperature rise reading of four consecutive readings taken at 5 minute intervals exceeds the average reading of these four readings by more than 2 degrees Celsius. An acceptable test shows the fuse is intact and no signs of breakdown or deterioration. From fifteen fuses in inventory, nine were tested and five failed to meet the current carrying capability acceptance criteria. Of these five fuses, four opened during testing, prior to reaching thermal stabilization and one was received in an open state. A review of previously issued inventory was performed, identifying no fuses issued for safety related applications. This condition will be further evaluated, as described in the CGD Recovery Project Plan.

Problem Evaluation Report 896388 was initiated to identify and address failure of critical characteristic testing criteria for resistance and power rating of resistors (CATID CGJ885H).

The power rating test places the resistor into a test circuit and applies 2 watts and maintains the wattage for 15 minutes. After the resistor has cooled, verify that resistance remains within the specified tolerance (82k ohms, +/- 5%). The resistance values, taken before and after the power rating test, were measured with a digital multi-meter and the power rating test applied 2 watts for 15 minutes, then repeated resistance measurements after the resistor cooled. Of nineteen resistors in inventory, ten were tested. Nine of ten resistance readings were higher than acceptance criteria before the power rating test and all ten power rating readings were higher than the acceptance criteria after the resistors cooled. Failed resistance values before power rating ranged from 86.45k to 90.95k ohms. After power rating, resistance values ranged from 87.74 to 92.65k ohms. A review of previously issued inventory identified two installations of the subject resistors in safety related equipment. The equipment was bench calibrated prior to being placed in service. The calibration verified that the outputs, in relation to the inputs, met acceptance criteria. This condition will be further evaluated, as described in the CGD Recovery Project Plan.

Problem Evaluation Reports 882153 and 901153 were initiated to identify and address failure of initial critical characteristic testing criteria for dimensions of 10 amp fuses (CATID CFJ418P).

The dimensional verification required direct measurement of fuses with comparison to the acceptance criteria. Based on initial manufacturer information (acceptable length dimension equals 1.50" +/- 0.01 0"), two fuses initially failed with values of 1.482" and 1.486". Expanded sample testing, based on EPRI TR-017218-R1, identified two additional failures with a value of 1.4825" and 1.4770". However, based on production drawing received from the manufacturer, the length acceptance criteria was revised to 1.500" +/- 0.031" (1.469" to 1.531 "), indicating the fuse lengths are within acceptance criteria. In addition, based on the production drawing, the acceptable diameter dimension was revised from 0.406 +I- 0.005" (0.401" to 0.411 ") to 0.406" +/- 0.004" (0.402" to 0.41 0") resulting in one fuse diameter failure due to a recorded diameter value of 0.401 0". A review of previously issued inventory was performed, identifying no fuses issued for safety related applications. The fuses passed all electrical criteria during testing. This condition will be further evaluated, as described in the CGD Recovery Project Plan.

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ENCLOSURE Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- July 2014 Status Report Problem Evaluation Reports 882164 and 899964 were initiated to identify and address failure of initial critical characteristic testing criteria for dimensions of 1 amp fuses (CATID CBT088Q).

The dimensional verification required direct measurement of fuses with comparison to the acceptance criteria. The acceptance criteria for fuse length is 1.500" +/- 0.031" (1.469" to 1.531"). From a sample size of six, two fuses failed to meet the established critical characteristic for acceptance for dimensional length with values of 1.535" and 1.536".

Expanded sample testing of the remainder of the inventory identified an additional fuse failing the dimensional criteria for length with a value of 1.538" (PER 899964). A review of previously issued inventory was performed, identifying no fuses issued for safety related applications. The fuses passed all electrical criteria during testing. This condition will be further evaluated, as described in the CGD Recovery Project Plan.

Problem Evaluation Reports 882141 and 899965 were initiated to identify and address failure of critical characteristic testing criteria for current clearing time of 35 amp fuses (CATID ADM954A). The current clearing time acceptance criterion specifies that with a test circuit consisting of 175 amps (+1 0/-0%}, the fuse shall blow in no less than 10 seconds. Of fourteen fuses in inventory, two fuses destructively tested failed to meet the initial testing acceptance criteria by opening early, with failure values at 4.05 and 6.85 seconds. Expanded sampling resulted in an additional two fuses opening early at 6.18 and 7.02 seconds, resulting in the second PER (899965) to identify the testing failure. Based on a review of previously issued inventory from 2001 to present, no fuses were issued for safety related applications. Issue history from time of purchase to 2001 will require additional review. This condition will be further evaluated, as described in the CGD Recovery Project Plan.

Problem Evaluation Report 880803 was initiated to identify and address failure of critical characteristic testing criteria for voltage rating of 50 amp fuses (CATID CDC572Q). Two fuses were not opened completely during current clearing testing and the fuses had the tendency to "re-strike" during the voltage rating test. Acceptance criterion specifies applying 100% rated voltage (250 VACNDC) for 15 minutes to the cleared (opened) fuse from the previous overload tests. The fuse successfully passes given no re-establishment of current or any indication of a tendency to re-strike. Of thirty fuses in inventory, two fuses failed to meet the acceptance criteria by not completely opening. An expanded sample of nine fuses, based on EPRI TR-017218-R1, were tested and successfully passed the voltage rating test after the fuses were cleared. The material was evaluated as acceptable based on the results of the expanded sample. The fuses (CATID CDC572Q) were released from "Hold" status.

Problem Evaluation Report 880819 was initiated to identify and address failure of initial critical characteristic testing criteria for current carrying capacity of 1 amp fuses (CATID BLA425C).

The current carrying capacity test applies 1 amp (+1 0/-0%) until the fuse is thermally stable.

Temperature stabilization has occurred when no individual temperature rise reading of four consecutive readings taken at 5 minute intervals exceeds the average reading of these four readings by more than 2 degrees Celsius. An acceptable test shows fuse is intact and no signs of breakdown or deterioration. Of thirty fuses in inventory, twelve were initially tested. One fuse non-destructively tested initially failed to meet the acceptance criteria by being "open" at the start of the test and being found with a cracked ferrule. An additional four fuses of the twelve tested passed current carrying capacity, but were rejected as a result of cracked ferrules. All fuses with intact ferrules passed the test criteria. Due to the failures found, an expanded sample of thirteen fuses, based on EPRI TR-017218-R1, were sent for physical inspection and current carrying capacity testing. Eleven of these thirteen were found with cracked ferrules and E 9 of 13

ENCLOSURE Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- July 2014 Status Report were not tested. The remaining two fuses tested successfully. The material was evaluated as acceptable based on successful testing of intact fuses. Special instructions designated physical inspection of the remaining fuses for cracked ferrules, which shall be scrapped. The remaining fuses (CATID BLA425C) were released from "Hold" status.

Problem Evaluation Reports 882129 and 898433 were initiated to identify and address failure of critical characteristic testing criteria for current clearing time of 1.25 amp fuses (CATID BLA414H). The current clearing time acceptance criterion specifies that with a test circuit consisting of 2.5 amps (+10/-0%), the fuse shall blow in no longer than 4 minutes. Of eighteen fuses in inventory, ten were initially tested. One fuse destructively tested failed to meet the testing acceptance criteria by failing to open at 2.5 amps within the time requirement and also not opening when the current was raised to 6.25 amps (five times rated). Expanded sampling of five additional fuses, based on EPRI TR-017218-R1, resulted in an additional fuse (1 of 5) opening late at 372.35 seconds, resulting in the second PER (898433) to identify the testing failure. A review of previously issued inventory was performed, identifying no fuses issued for safety related applications. This condition will be further evaluated, as described in the CGD Recovery Project Plan.

Problem Evaluation Report 900197 was initiated to identify and address failure of initial critical characteristic testing criteria for dimensions of 30 amp fuses (CATID BYL598T)(BFN Site). The dimensional verification required direct measurement of fuses with comparison to the acceptance criteria. From initial manufacturer information, the acceptance criteria for fuse length was specified as 2.875" +/- 0.005", which resulted in seven fuse failures with values of 2.891", 2.881", 2.885", 2.882", 2.883", 2.881", and 2.881". Based on receipt of production drawings from the manufacturer, the acceptance criteria for fuse length was changed to 2.875" +/- 0.020", that resulted in acceptable fuse lengths. Acceptable criteria for fuse diameter was specified as 0.563" +/- 0.005". One fuse was found to have a diameter of 0.569", failing the diameter dimensional tolerance by 0.001" on the high end. A review of previously issued inventory was performed, identifying no fuses issued for safety related applications. The fuses passed all electrical criteria during testing. This condition will be further evaluated, as described in the CGD Recovery Project Plan.

Problem Evaluation Reports 885235 and 896391 were initiated to identify and address failure of critical characteristic testing criteria for current clearing time of 1 amp fuses (CATID BKY581W).

The current clearing time acceptance criterion specifies that with a test circuit consisting of 5 amps (+10/-0%), fuse shall blow in no less than 10 seconds. Offive fuses tested against current clearing time acceptance criteria, one fuse destructively tested failed to meet the initial testing acceptance criteria by opening early with a failure value of 3.02 seconds. Expanded sampling of six additional fuses, based on EPRI TR-017218-R1, resulted in an additional two fuses opening early at 8.28 and 8.27 seconds, resulting in the second PER (896391) to identify the testing failure. A review of previously issued inventory was performed, identifying no fuses issued for safety related applications. This condition will be further evaluated, as described in the CGD Recovery Project Plan.

Problem Evaluation Report 895583 was initiated to identify and address failure of critical characteristic testing criteria for current clearing time of 1.25 amp fuses (CATID AEY065C).

There are two current clearing time acceptance criteria. The first criterion specifies that with a test circuit consisting of 6.25 amps (+10/-0%), fuse shall blow in no less than 10 seconds. The second criterion specifies that with a test circuit consisting of 2.5 amps (+10/-0%), the fuse shall blow in no longer than 4 minutes. Of two fuses in inventory, two were sent for testing. One fuse E10of13

ENCLOSURE Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- July 2014 Status Report failed to meet the initial testing acceptance criteria by failing to open at 2.5 amps within the time requirement, but opened when the current was raised to 6.25 amps. The second fuse was tested satisfactorily at 6.25 amps. No additional fuses were available for expanded sample testing, therefore, the item was identified as a testing failure. A review of previously issued inventory was performed, identifying no fuses issued for safety related applications. This condition will be further evaluated, as described in the CGD Recovery Project Plan.

Problem Evaluation Report 882169 was initiated to identify and address failure of critical characteristic testing criteria for current clearing time of 0.25 amp fuses (CATID BHQ577Y).

The current clearing time acceptance criterion specifies that with a test circuit consisting of 1.25 amps (+1 0/-0%}, the fuse shall blow in no less than 10 seconds. Of five fuses tested against current clearing time acceptance criteria, two fuses failed to meet the acceptance criteria by opening early with values of 9.25 and 9.00 seconds. An expanded sample of six fuses, based on EPRI TR-017218-R1, were tested and successfully passed the current clearing time test. The material was evaluated as acceptable based on the results of the expanded sample. The fuses (CATID BHQ577Y) were released from "Hold" status.

Problem Evaluation Report 882149 was initiated to identify and address failure of critical characteristic testing criteria for current clearing time of 20 amp fuses (CATID BRE028R). The current clearing time acceptance criterion specifies that with a test circuit consisting of 100 amps (+10/-0%), fuse shall blow in no less than 8 seconds. Of seven fuses tested against current clearing time acceptance criterion, two failed with values of 6.47 and 7.00 seconds. An expanded sample of eight fuses, based on EPRI TR-017218-R1, were tested and successfully passed the current clearing time test. The material was evaluated as acceptable based on the results of the expanded sample. The fuses (CATID BRE028R) were released from "Hold" status.

Problem Evaluation Report 882150 was initiated to identify and address failure of critical characteristic testing criteria for current clearing time of 1.6 amp fuses (CATID CET176J). The current clearing time acceptance criterion specifies that with a test circuit consisting of 3.2 amps

(+10/-0%), the fuse shall blow in no less than 5 seconds and no longer than 120 seconds. Of four fuses subjected to current clearing time testing, one fuse failed to meet the acceptance criteria by opening later than the acceptance criteria with failure values at 153.92 seconds. An expanded sample of five fuses, based on EPRI TR-017218-R1, was tested and successfully passed the current clearing time test. The material was evaluated as acceptable based on the results of the expanded sample. The fuses (CATID CET176J) were released from "Hold" status.

Problem Evaluation Report 882168 was initiated to identify and address failure of critical characteristic testing criteria for current carrying capacity of 5 amp fuses (CATID BBR516K).

The current carrying capacity test applies 5 amps (+10/-0%) until the fuse is thermally stable.

Temperature stabilization has occurred when no individual temperature rise reading of four consecutives readings taken at 5 minute intervals exceeds the average reading of these four readings by more than 2 degrees Celsius. An acceptable test shows the fuse is intact and no signs of breakdown or deterioration. Of nine fuses initially tested for current carrying capacity, one fuse failed to meet the acceptance criteria by opening during testing and being found with a cracked indicator pin, likely contributing to the failure. Due to the failure, an expanded sample of five fuses, based on EPRI TR-017218-R1, were tested and passed the acceptance criteria.

The material was evaluated as acceptable based on the results of the expanded sample. The fuses (CATID BBR516K) were released from "Hold" status.

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ENCLOSURE Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- July 2014 Status Report Problem Evaluation Reports 885242 and 900219 were initiated to identify and address failure of critical characteristic testing criteria for current clearing time and commercial failure of 60 amp fuses (CATID CJD815L). The current clearing time acceptance criterion specifies that with a test circuit consisting of 120 amps (+1 0/-0%}, the fuse shall blow in no longer than 6 minutes.

Of four fuses tested for current clearing time, one fuse failed to meet the initial testing acceptance criteria by failing to open at 120 amps within the time requirement. An expanded sample of four additional fuses, based on EPRI TR-017218-R1, resulted in acceptable CGD criteria results; however, although one fuse cleared at 356.95 seconds, passing the CGD acceptance criteria, the body ruptured when the fuse cleared. The fuse "failed" the UL 248-1 commercial criteria as a result of the fuse rupturing during testing. A PER (900219) was written to identify the potential personnel safety concern and/or commercial risk to adjacent equipment.

The material was evaluated as acceptable based on the results of the expanded sample. The fuses (CATID CJD815L) were released from "Hold" status. This issue is closed from a CGD perspective and corrective actions will address the commercial issues.

Problem Evaluation Report 895584 was initiated to identify and address failure of critical characteristic testing criteria for current clearing time of 1100 amp fuses (CATID CHQ955H).

The current clearing time acceptance criterion specifies that with a test circuit consisting of 5000 amps(+/- 10%}, the fuse shall blow in no less than 4 seconds and no longer than 10 seconds. Of two fuses tested for current clearing time, both failed to meet the testing acceptance criteria by opening beyond the time requirement at 17.98 and 18.23 seconds.

Based on the failure of both sample fuses, the item was identified as a testing failure. A review of previously issued inventory was performed, identifying no fuses issued for safety related applications. This condition will be further evaluated, as described in the CGD Recovery Project Plan.

Problem Evaluation Reports 885244 and 896395 were initiated to identify and address failure of critical characteristic testing criteria for current clearing time of 60 amp fuses (CATID BKY793D). The current clearing time acceptance criterion specifies that with a test circuit consisting of 300 amps (+10/-0%), the fuse shall blow in no less than 10 seconds. Of four fuses tested for current clearing time, one fuse failed to meet the acceptance criteria by opening early at 8.25 seconds. Expanded sampling resulted in an additional fuse opening early at 8.30 seconds as documented in PER 896395. A review of previously issued inventory was performed, identifying no fuses issued for safety related applications. This condition will be further evaluated, as described in the CGD Recovery Project Plan.

Problem Evaluation Report 880809 was initiated to identify and address failure of critical characteristic testing criteria for voltage rating of 50 amp fuses (CATID BTT498Q). Acceptance criterion is specified as application of 100% rated voltage (600 VAC) for 15 minutes to the cleared (opened) fuses. The fuse successfully passes given no re-establishment of current or any indication of a tendency to re-strike. Of three fuses tested for voltage rating, one fuse was not opened completely during current clearing testing and the fuse possessed the tendency to "re-strike" at 600 volts. An expanded sample of four fuses, based on EPRI TR-017218-R1, were tested and successfully passed the voltage rating test after the fuses were cleared. The material was evaluated as acceptable based on the results of the expanded sample. The fuses (CATID BTT498Q) were released from "Hold" status.

Problem Evaluation Reports 888324 and 912990 were initiated to identify and address failure of critical characteristic testing criteria for current carrying capacity of 30 amp fuses (CATID E12of13

ENCLOSURE Tennessee Valley Authority (TVA) Nuclear Power Group Commercial Grade Dedication Recovery Project- July 2014 Status Report BEE283N). The current carrying capacity test applies a test current of 30 amps (+10/-0%) until the fuse is thermally stable. Temperature stabilization has occurred when no individual temperature rise reading of four consecutives readings taken at 5 minute intervals exceeds the average reading of these four readings by more than 2 degrees Celsius. An acceptable test shows the fuse is intact and no signs of breakdown or deterioration. Of ten fuses tested for current carrying capacity, four fuses failed to meet the acceptance criteria by opening during testing. Expanded sampling resulted in an additional fuse opening. Problem Evaluation Report 912990 was initiated to address the additional failure. A review of previously issued inventory was performed, identifying no fuses issued for safety related applications. This condition will be further evaluated, as described in the CGD Recovery Project Plan.

Problem Evaluation Report 899963 was initiated to identify and address failure of initial critical characteristic testing criteria for dimensions and current carrying capacity of 30 amp fuses (CATID BYL598T)(SQN Site). The dimensional verification required direct measurement of fuse diameter and length with comparison to the acceptance criteria. From initial manufacturer information the acceptance criteria for fuse length was specified as 2.875" +/- 0.005", which resulted in ten fuse failures, from a sample size of fourteen, with values of 2.886", 2.895",

2.895", 2.901", 2.868", 2.889", 2.896", 2.896", 2.882" and 2.885". Based on receipt of production drawings from the manufacturer, the acceptance criteria for fuse length was changed to 2.875" +/- 0.020". The revised criteria resulted in acceptable fuse lengths for seven of the ten fuses, resulting in three fuse failures due to length deviations. Acceptable criteria for fuse diameter was specified as 0.563" +/- 0.005". Ten fuses, from a sample size of fourteen, failed diameter acceptance criteria with values of 0.569", 0.570", 0.570", 0.569", 0.570" 0.569", 0.570",

0.569", 0.569", 0.570". The current carrying capacity test applied a test current of 30 amps until the fuse is thermally stable. Temperature stabilization has occurred when no individual temperature rise reading of four consecutives readings taken at 5 minute intervals exceeds the average reading of these four readings by more than 2 degrees Celsius. An acceptable test shows fuse is intact and no signs of breakdown or deterioration. Two fuses, from a sample size of fourteen, failed the current carrying capacity testing. A review of previously issued inventory was performed, identifying no fuses issued for safety related applications. This condition will be further evaluated, as described in the CGD Recovery Project Plan.

Problem Evaluation Report 886874 was initiated to identify and address failure of critical characteristic testing criteria for current carrying capacity of 30 amp fuses (CATID CEP098J).

The current carrying capacity test applies a test current of 30 amps (+10/-0%) until the fuse is thermally stable. Temperature stabilization has occurred when no individual temperature rise reading of four consecutives readings taken at 5 minute intervals exceeds the average reading of these four readings by more than 2 degrees Celsius. An acceptable test shows fuse is intact and no signs of breakdown or deterioration. Of eight fuses tested for current carrying capacity, one fuse failed to meet the acceptance criteria by opening during testing. Due to the failure, an expanded sample of nine fuses, based on EPRI TR-017218-R1, were tested and all passed the acceptance criteria. The material was evaluated as acceptable based on the results of the expanded sample. The fuses (CATID CEP098J) were released from "Hold" status.

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