ML101600502

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Chapter 12 - Question 8 - Calculation
ML101600502
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{{#Wiki_filter:004 - Chapter 12 - Question 8 - Calculation

ORIGINAL TVAN CALCULATION COVERSHEET Title Extending Channel Operational Test Frequency for Radiation Plant WBN Page 1 Monitors Unit I Preparing Organization Key Nouns (For EDM) EEB Radiation Monitor, COT Calculation Identifier Each time these calculations are issued, preparer must ensure that the original (RO) RlMS/EDM accession number is filled in. WBN-EEB-EDQ1090-99005 Rev (for EDM use) EDM Accession Number Applicable Design Document(s) RO R26 0002 1 5 402 FSAR 12.3.4, 11.4 R UNID System(s) 90 R R RO R R R Quality Related? Yes No [gJ 0 DCN, EDC, NA Safety related? Ifyes, mark Yes No NA Qualitv Related ves [gJ 0 Prepared £;~Bpm Checked E. J. Bradley These calculations contain Yes No ~ unverified assumption(s) 0 [gJ that must be verified later? Design E. 1. Bra~y These calculations contain Yes No Verified ~~ special requirements and/or 0 [gJ limiting conditions~ Approved i$ These calculations contain a Yes No ~~ design output attachment? 0 [gJ Approval 2 *B*Z~06 Calculation Classification Date SAR Yes [8J No 0 YesONQD Yes 0 NoD Yes 0 No 0 Microfiche generated Yes No Affected? 0 [gJ Revision Entire calc 0 Entire calc 0 Entire calc 0 Entire calc 0 Number applicability Selected pgs 0 Selected pgs 0 Selccted pgs 0 Statement of Problem: The Channel Operational Tests (COT) have been perfonned at a quarterly frequcncy for many monitors. History has shown that frequency is overly conscrvative. This calculation analyzes the historical data and recommends changes in the COT frequency. Abstract The radiation monitors presently have a COT frequency ofOnce per quarter. The COT data was analyzed to determine ifthis frequency is overly conservative. It was detennined that the COT frequency can be extendcd. For monitors that are required by Tech Spee or ODCM a COT frequency ofonce every 3 quarters was reCommended and onCe per fuel cycle for all others. [8J Microfilm and return calculation to Calculation Library. Address: 0 Microtllm and destroy. 0 Microfilm and return calculation to:

TVAN CALCULATION RECORD OF REVISION CALCULATION IDENTIFIER WBN-EEB-EDQ1090-99005 I Title Extending Channel Operational Test Frequency for Radiation Monitors Page 2 Revision No. o DESCRIPTION OF REVISION Initial Issue FSAR Review: Referenced sections ofthe FSAR & Technical Requirements manual, and Tech Specs were reviewed tor impact. There is no present impact. This calculation gives a basis for change. This calculation contains 24 pages with 2 attachment for a total of47 pages_

TVAN CALCULATION TABLE OF CONTENTS WBN-EEB-EDQ1090-99005 I Revision: I 0 Page 3 TABLE OF CONTENTS SECTION TITLE PAGE Purpose 5 References 5 Design Input Data 5 Assumptions 6 Special RequirementslLimiting Conditions 6 Computations and Analyses 6 Supporting Graphics 8 Summary ofResults 21 Conclusions 21 System Engineer Review 21 Attachments

TVAN CALCULATION DESIGN VERIFICATION FORM Calculation Identifier WBN-EEB-EDQI090-99005 Method of design verification used: I. Design Review [gI 2. Alternate Calculation 0 3. Qualification Test D Comments: Revision 0 I reviewed the calculation methodology ofusing a statistically valid sample of recent operating history to make predictions about future operating history. The basis for the statistical sample is sound and referenced. The general population of radiation monitors that are presently in the maintenance program were used as the pool of information to draw from. The conclusions drawn are valid. The findings are that the devices are within their acceptable as left band after the COT period of92 days. The engineering calculations support an 18 month calibration cycle withan assumed starting point for the monitors being left within the as left band; therefore, the entire 18 month calibration interval is un-degraded by this 92 day COT period. As a measure of conservatism the conclusion to extend the COT from the present 92 days to the 9 month interval is acceptable. As additional information an informal sample ofEMPAC records were reviewed. Out of approximately 340 records reviewed there were less than halfthe allowed number of failures to still meet the statistical conclusion of acceptable operation. The calculation method, supporting data, and conclusions are acceptable.

Extending Channel Operational Test Frequency for Radiation Monitors WBN-EEB-EDQI090-99005 Rev. 0 Purpose The purpose ofthis calculation is to determine whether the present Channel Operational Test (COT) frequency for radiation monitors can be reduced. Decreasing the frequency reduces the maintenance induced wear and reduces the manpower costs to the site. The present frequency is once per quarter. The present engineering calculations for radiation monitors with NE SSD's predict acceptable operation ofthe radiation monitors for a fuel cycle (18 months). All other radiation monitors performance characteristics are based on NE SSD's. References 1. G29 P.S. 4.M.4.1 (R6) External Surface Cleanness of Austenitic Stainless Steel Piping and Components 2. EEB-TI-28 Setpoint Calibrations (R3) 3. FSAR 12.3.4 (Amendment 0), 11.4 (Amendment 0), Living FSAR (1557 SOO PKG) 4. Tech Spec 1.1, SR 3.3.3.3, Table 3.3.3-1, SR 3.3.6.4, Table 3.3.6.1, SR 3.3.7.2, Table 3.3.7-1, SR 3.3.8-2, Table 3.3.8-1, SR 3.4.15.2 (Amendment 18 T35 990 330 986) 5. Technical Requirements Manual!.1 (Rev. 16 T35 990413 990) 6. ODCM Table 2.1-1, Table 2.1-2, Table 3.1 Rev. 0 7. System Engineer Review of additional data (T69 000125 497) 8. Control Diagrams 1-47W6l0-90-1 R28, -2 R36, -3 R29, -4 R38, -5 R26 9. Procedures: SPP 6.7, SPP 3.6, SPP 6.6 and NEDP 12 Design Input Data I. COT Definitions: FSAR 12.3.4.1.3 & 12.3.4.2.6: The channel operational test (COT) is the injection ofa simulated or actual signal into the channel as close to the sensor as practicable to verity the operability of required alarm, interlock, display and trip functions. The COT includes adjustments, as necessary, ofthe required alarm, interlock, and trip setpoints so that the setpoints are within the required range and accuracy. Tech Spec 1.1: A COT shall be the injection of a simulated or actual signal into the channel as close to the sensor as practicable to verifY the OPERABILITY of required alarm, interlock, display, and trip functions. The COT shall include adjustments, as necessary, ofthe required alarm, interlock, and trip setpoints so that the setpoints are within the required range and accuracy. Technical Requirements Manual 1.1: A COT shall be the injection of a simulated or actual signal into the channel as close to the sensor as practicable to verify the OPERABILITY of required alarm, interlock, display, and trip functions. The COT shall include adjustments, as necessary, ofthe required alarm, interlock, and trip setpoints so that the setpoints are within the required range and accuracy. ODCM Table 2.1-1 note (1) (typical example - each monitor may have unique functions that are required to be checked) : The CHANNEL OPERATIONAL TEST shall demonstrate that automatic isolation ofthis pathway occurs if the instrument indicates measured levels above the alarm/trip setpoint. The CHANNEL OPERATIONAL TEST also demonstrates control room annunciation occurs if any ofthe following conditions exist: I. Instrument indicates measured levels above the alarm setpoint, or Prepared: Richard Brehm Checked: Edward Bradley Page 5

Extending Channel Operational Test Frequency for Radiation Monitors WBN-EEB-EDQ1090-99005 Rev. 0

2. Circuit failure, or
3. Indication of downscale failure, or
4. Instrumentation controls not set in operate mode, or
5. Loss of sample flow.

2. Calculation Basis: Radiation monitors with NE-SSD's (Safety related, Tech Spec, and compliance that accuracy is a factor) have a calculational time basis of I fuel cycle (18 months + 25%). This was verified by a review of all the radiation monitor NE-SSDs. All other radiation monitors have a plant SSD and are based upon those with NE-SSDs. Therefore, all monitors have an engineering basis (directly via an NE-SSD or indirectly via similarity) of acceptable operation for I fuel cycle. 3. COT / Calibration / Maintenance History: EMPAC is a data base that records the maintenance history on plant equipment. This database was reviewed for the maintenance history on the COT performances. The list ofradiation monitors in Table 3 was used as the basis. This table represents the radiation monitors that had data that could be retrieved from EMPAC at the time ofthe data study. EMPAC is a living database and changes are made with time. Until recently there was no set method ofrecording the work performed. Therefore, a set ofthe actual work performed sheets were retrieved in hardcopy to verifY and interpret the information in EMPAC when the data recorded was ambiguous. Only the latest available COT at the time ofthe study was used because this best represents the present instrument performance. 4. G29 - P.S. 4.MA.I (R6) sepecifies a sampling methodology that produces a 95/95 probability/confidence for an attribute in a population. This method was utilized to determine radiation monitor performance during COTs. Assumptions None Special Requirements/Limiting Conditions None Computations and Analyses This calculation extends the COT frequency for the maintained monitors. The population size of monitors was determined to be 77 (See Table 3). Data was taken on the radiation monitors from EMPAC. The maintenance history recorded in EMPAC includes work orders when the radiation monitors were first brought into service. Therefore, there are work orders that show mis-wiring, missing components, etc. These work orders are not indicative the operation ofthe present system. Therefore, the methodology chosen for this analysis used the latest available COT that data can be accurately understood. This means that ifthe work performed field in EMPAC is unambiguous that it was used directly. Hardcopy data was retrieved from RIMS when the EMPAC data was insufficient. According to G29, 40 monitors must be sampled for a population of 77 monitors. Forty-one monitors were sampled due to changes in the counting ofmonitors. Ofthese 41 samples, zero failures are allowed to state with a 95/95 probability and confidence that the attribute of interest is indicative ofthe population. The attribute of interest for this statistical test is the "as-left" band. Ifthe monitors are operating within this band for the COT test, then recalibration is not Prepared: Richard Brehm Checked: Edward Bradley Page 6

Extending Channel Operational Test Frequency for Radiation Monitors WBN~EEB-EDQ1090-99005 Rev_ 0 required. Since the engineering calculations prove that as long as a device is left within the "as-left" band, then they can operate for 18 months. The criteria for using the "as-left" band as a successful performance is conservative for a COT since by definition the instrument would be correctly operating if it were found within the "as-found" band. EEB TI-28 defines the "as-found" band as the region where the instrument is performing as predicted. During a calibration and not a COT, ifthe instrument were found within the "as-found" band, then it would be recalibrated to within the "as-left" band. However, based upon a review ofthe EMPAC data it has been WBN's practice to recalibrate as part ofa COT when the instrument is outside the "as-left" but within the "as-found". The monitors were numbered from 1 to 78. A random number generator was used to produce the list of monitors to sample. The first COT for each ofthese sampled monitors that the performance could be determined either directly from the EMFAC "work performed" field or from the hardcopy RIMS data was chosen as the sample for each monitor. This data is the best example of how the monitors are presently maintained and operating. The attribute evaluated is the accuracy or performance of each module checked. This includes as appropriate for each monitor Ratemeter Indications Recorder Flow Switches Alarm Setpoints Ratemeter Analog Outputs Flow Controllers Not all functions above are appropriate for all monitors. However, the COT tests each monitor for all calibratable features. Table 2 tabulates the results ofthe above sample test. With only one exception, all 41 COTs found the radiation monitors' performance within the "as-left" band. The one exception was so slight that it was within the accuracy ofthe measuring equipment and is not considered for this evaluation to be outside the "as-left" band. Therefore, to a 95/95 confidence level the COT data supports that the population of radiation monitors at WBN are working better than expected. They are operating within the setting tolerance assumed in the accuracy calculations; therefore, the full 18 month uncertainty is still available. Prepared: Richard Brehm Checked: Edward Bradley Page 7

Extending Channel Operational Test Frequency for Radiation Monitors Supporting Graphics WBN-EEB-EDQ1090-99005 Rev. 0 The following table lists the radiation monitors that were available in EMPAC at the start of this review. The monitors were numbered 1 through 78. Excel's random number generator was used to get a list of the first 41 unique numbers. These random numbers were then used to select the radiation monitors to sample. (Note 1: due to numbering error, this number sequence is left blank. Note 2: The monitor numbering is not always consistent with the numbering used in EMPAC. WBN is not consistent numbering the monitors, therefore the monitor designation numbers are for data grouping only. A monitor with a -106 means all subgroups also, the monitor was treated as a whole. This note applies to all tables.) Table 1 Random Selection Number Monitor Random Selection 1 O-RM-90-12 1 2 O-RM-90-13 2 3 1-RM-90-14 3 4 O-RM*90-15 4 5 0-RM-90-16 8 6 O-RM-90-17 14 7 1-RM-90-59 16 8 1..:RM-90-60 18 9 1-RM-90-61 20 10 1-RM-90-62 22 11 O-RM-90-101A 24 12 1-RM-90-272 25 13 1-RM-90-273-A 26 14 1-RM;:~O-274-B 27 15 1-RM-90-275 29 16 1-RM-'9O-276 30 17 1-RM-90-277 31 '.~. '.:.-...... 18 1-RM-90~27'8":i::li"':' 32 19 1-RM-90-280 33 .20 1-RM:-90-290 34 21 1-RM-90-291 35 22' 1-RM-90-292 36 23 1-RM-90-293 37 24 1-RM-90-1 38 25 2-RM-90-1 39 26 1-RM-90-2 44 27 O-RM-90-3 46 28 0-RM-90-4 49 29 0-RM-90-5 51 30 1-RM-90-6 53 31 2-RM-90-s 59 Prepared: Richard Brehm Checked: Edward Bradley Page 8

Extending Channel Operational Test Frequency for Radiation Monitors WBN-EEB-EDQ1090*99005 Rev. 0 Number Monitor Random Selection 32... 1-RM-i90-7 61 33. 2-RM-90,;.] 62 34 .t"'RM-90~8 63 35 2-RM-90-8 64 36 0-RM-90-9 65 37 1~RM~90-tO 68 38 2-RM-90-10 69 39 0-RM-9Q-11 72 40 1-RM-90-119 73 41 1-RM-90-120 74 42 1-RM-90-0121 43 0-RM-90-122 44< '........ 0-RM-90L123..**....*.* 45 0-RM-90-103-B 46 ...1':RM-90;-1 06 47 0-RM-90-1 02A 48 2-RM-90-402 . ***** 49*,*." 1-RM-90-112 50 O-RM-90-118 51 l-RM~90-123 52 2-RM-90-123 53 O-RM~90-125-A...* 54 Intentionally blank Note 1 55 0-RM-90-126-B 56 O-RM-90-132 57 2-RM-90-400 58 O-RM-90-135 59 0-RM~90-138 60 O-RM-90-133-A 51 0;-RM,;.90-134-S

            • .. **62*... ***

.O-'RM-90:':140-A. 63 O-RM;-90~14t;-8!: 64 O.;oRM'-90;-205.;oA 65 O-RM-90-206-B 66 O-RM-90-212 67 O-RM-90-225 68 O-RM-90-230 69 O-RM-90-231 70 1-RM-90-271-A 71 1-RM-90-404 72 1-RM-90-421 73 1-RM-SO-422 74 1-RM-SO-423 75 1-RM-90':424 Prepared: Richard Brehm Checked: Edward Bradley Page 9

Extending Channel Operational Test Frequency for Radiation Monitors WBN-EEB-EDQI090-99005 Rev. 0 Number Monitor Random Selection 76 1-RM-90-130-A 77 1-RM-90-131-A 78 1-RM-90-400 Prepared: Richard Brehm Checked: Edward Bradley Page 10

Extending Channel Operational Test Frequency for Radiation Monitors WBN-EEB-EDQI090-99005 Rev. 0 The following table lists the data obtained from EMPAC or RIMS hardcopy for the sampled monitors. Table 2 Work Performed Number Monitor Date WO# Work Performed Pass/Fail Reel/Frame 1 0-RM-90-12 3/29/99 99-000322-000 PM as found condition 100 (note: this description Pass in work performed means "left as found") 2 0-RM-90-13 11/30/98 98-012479-000 Performed JMI-90.027 and IMI-90.002, all Pass readings left as found. 3 1-RM-90-14 1217/98 98-012935-000 Performed 92 day electronic COT, all readings Pass 5791/1744 left as found. Performed 92 day flow COT, adjusted high and low flow switches (up). Adjusted flow controller down. The Low Flow switch was outside the "as left" by 0.3 scfm and the Flow controller exceded the "as left" by 0.09 scfm. All other instruments were left as found. All values are well within the "as found" limit 4 0-RM-90-15 11/5/98 98-012004-000 Performed IMI-90.027 and IMI-90.002, all Pass readings left as found. 8 1-RM-90-60 2/5/99 98-014050-000 Performed 92 day COT, all readings left as Pass found. 14 1-RM-90-274-8 1/22/99 98-014058-000 Performed 92 day COT, all readings left as Pass found. 16 1-RM-90-276 1/11/99 98-014078-000 Performed 92 day COT, all readings left as Pass found. 18 1-RM-90-278 1/19/99 98-014067-000 Performed 92 day COT, all readings left as Pass found. 20 1-RM-90-290 12/7/98 98-012952-000 Performed 92 day COT, all readings left as Pass found. 22 1-RM-90-292 2/16/99 98-014045-000 Performed 92 day COT,all readings left as found. Pass 24 1-RM-90-1 2/28/99 98-015025-000 Performed 92 day COT, all readings left as Pass Prepared: Richard Brehm Checked: Edward BradIey Page II

Extending Channel Operational Test Frequency for Radiation Monitors WBN-EEB-EDQ 1090-99005 Rev. 0 Number Monitor Date WO# Work Performed Pass/Fail Reel/Frame found. 25 2-RM-90-1 2/28/99 98-015026-000 Performed 92 day COT, all readings left as Pass found. 26 1-RM-90-2 12/18/98 98-012918-000 Performed 92 day COT, all readings left as Pass found. 27 0-RM-90-3 12/23/98 98-012949-000 COT all values left as found Pass 5793/1024 29 0-RM-90-5 2/3/99 98-016679-000 Performed 18 month channel calibration, 92 day Pass COT, and ratemeter alignment, all readings left as found. 30 1-RM-90-6 1/11/99 98-015028-000 Performed 92 day COT, all readings left as Pass found. 31 2-RM-90-6 1/28/99 98-016278-000 Performed 18 month channel calibration, 92 day Pass COT, and module alignment, all readings left as found. 32 1-RM-90-7 2/10/99 98-014065-000 Performed 92 day COT, all readings left as found Pass 33 2-RM-90-7 1/29/99 98-014072-000 Performed 92 day COT, all readings left as Pass found. 34 1-RM-90-8 2/11/99 98-014018-000 Performed 92 day COT, all readings left as Pass found. 35 2-RM-90-8 2/2/99 98-014073-000 Performed 92 day COT, all readings left as Pass found. 36 0-RM-90-9 2/5/99 98-014064-000 Performed 92 day COT, all readings left as Pass found. 37 1-RM-90-10 12/9/98 98-013013-000 Performed 92 day COT, all readings left as Pass found. 38 2-RM-90-10 4/6/99 99-000208-000 Pm As Found Condition 100 Pass 39 0-RM-90-11 12/4/98 98-012925-000 Performed 92 day COT, all readings left as Pass found. 44 0-RM-90-123 2/1/99 98-014079-000 Performed 92 day COT, all readings left as Pass found. Prepared: Richard Brehm Checked: Edward Bradley Page 12

Extending Channel Operational Test Frequency for Radiation Monitors WBN-EEB-EDQI090-99005 Rev. 0 Number Monitor Date WO# Work Performed Pass/Fail Reel/Frame 46 1-RM-90-1 06A-A 1/11/99 98-015535-000 Performed 92 day COT, all readings left as Pass found. 49 1-RM-90-112C-B 1/29/99 98-016539-000 Performed 92 day flow COT, all readings left as Pass found. 51 1-RM-90-123 2/8/99 98-015090-000 all readings left as found Pass 53 O-RM-90-125-A 3/6/99 99-000338-000 Performed 92 day flow COT,all readings left as Pass found. 59 0-RM-90-1 38 12/4/98 98-012481-000 Performed 92 day flow and electronic COT, all Pass readings left as found. 61 0-RM-90-134-B 2/16/99 98-016593-000 Performed 92 day COT, all readings left as Pass found. 62 0-RM-90-140-A 12/9/98 98-013050-000 Cleaned rotometers and performed IMI-90.005, Pass all readings left as found. 63 0-RM-90-141-B 2/18/99 98-016898-000 Performed 92 day COT, aU readings left as Pass found. 64 0-RM-90-205-A 12/4/98 98-013256-000 Performed 92 day COT, all readings left as Pass found. 65 0-RM-90-206-B 2/11/99 98-016654-000 Performed 92 day COT, all readings left as Pass found. 68 0-RM-90-230 2/1/99 98-014046-000 Performed 92 day COT, all readings left as Pass found. 69 0-RM-90-231 2/8/99 98-014049-000 Performed 92 day COT, all readings left as Pass found. 72 1-RM-90-421 12/9/98 98-012924-000 Performed 92 day COT, all readings left as Pass found. Recorder 1-RR-090-0268 has WO 98-015690-000 against it for repair. 73 1-RM-90-422 2/8/99 98-014066-000 Performed 92 day COT, all readings left as Pass found. 74 1-RM-90-423 12/23/98 98-012948-000 COT All readings left as found pass 5793/0024 Prepared: Richard Brehm Checked: Edward Bradley Page 13

Extending Channel Operational Test Frequency for Radiation Monitors WBN-EEB-EDQI090-99005 Rev. 0 Number Monitor Date WO# Work Performed Pass/Fail Reel/Frame 41 41 41 Table 3 Disposition Listing from EMPAC and Compilation of Programs Unid FSAR FSAR not Other Tech Spec aDeM Sampled Maintained Required Required for Unit 1 WBN-O-LPR -090-0003 Y Y Y WBN-O-LPR -090-0004 y y WBN-O-LPR -090-0005 Y Y Y WBN-O-LPR -090-0009 y y y WBN-O-LPR -090-0011 y y y WBN-O-LPR -090-0012 y y y WBN-O-LPR -090-0013 Y y y WBN-O-LPR -090-0015 Y y y WBN-O-LPR -090-0016 Y y WBN-O-LPR -090-0017 Y Y WBN-O-LPR -090-0101A y y WBN-O-LPR -090-0101 B counted with 101A Y Y WBN-O-LPR -090-0101C counted with 101A Y(COT NA) y WBN-O-LPR -090-0102-A Y y y WBN-O-LPR -090-0103-8 Y y y WBN-O-LPR -090-0105 NoSSD Prepared: Richard Brehm Checked: Edward Bradl1ey Page 14

Extending Channel Operational Test Frequency for Radiation Monitors WBN-EEB-EDQ1090-99005 Rev. 0 Listing from EMPAC and Compilation of Programs Unid FSAR FSAR not Other Tech Spec ODCM Sampled Maintained Required Required for Unit 1 WBN-O-LPR -090-0118 Y Y y WBN-O-LPR -090-0122 Y y y WBN-O-LPR -090-0123 Y y y WBN-O-LPR -090-0125-A Y y y y WBN-O-LPR -090-0126-8 Y y y WBN-O-LPR -090-0132A y WBN-O-LPR -090-0132B Counted with 132 A y WBN-O-LPR -090-0132C Counted with 132 A WBN-O-LPR -090-0133-A y y y WBN-O-LPR -090-0134-8 Y y y y WBN-O-LPR -090-0135 Y Y WBN-O-LPR -090-0138 Y y Y WBN-O-LPR -090-0140-A Y y Y Y WBN-O-LPR -090-0141-8 Y y y y WBN-O-LPR -090-0205-A Y y y WBN-O-LPR -090-0206-8 Y y y WBN-O-LPR -090-0211 NoSSD WBN-O-LPR -090-0212 Y Y y WBN-O-LPR -090-0217A Portable - No SSD WBN-O-LPR -090-02178 Portable - No SSD WBN-O-LPR -090-0217E Portable - No SSD WBN-O-LPR -090-0218A Portable - No SSD WBN-O-LPR -090-02188 Portable - No SSO WBN-O-LPR -090-02180 Portable - No SSO WBN-O-LPR -090-0218E Portable - No SSO Prepared: Richard Brehm Checked: Edward BradIey Page 15

Extending Channel Operational Test Frequency for Radiation Monitors WBN-EEB-EDQI090-99005 Rev. 0 Listing from EMPAC and Compilation of Programs Unid FSAR FSAR not Other Tech Spec ODCM Sampled Maintained Required Required for Unit 1 WBN-O-LPR -090-0219A Portable - No SSD WBN-O-LPR -090-0219B Portable - No SSD WBN-O-LPR -090-02190 Portable - No SSD WBN-O-LPR -090-0219E Portable - No SSD WBN-O-LPR -090-0225 y y y WBN-O-LPR -090-0230 y y y WBN-O-LPR -090-0231 y y y WBN-O-LPR -090-0235 NoSSD WBN-O-LPR -090-0236 NoSSD WBN-O-LPR -999-0063 TLO - No SSD WBN-1-LPR -090-0001 y y y WBN-1-LPR -090-0002 Y Y Y WBN-1-LPR -090-0006 y y y WBN-1-LPR -090-0007 y y y WBN-1-LPR -090-0008 Y y y WBN-1-LPR -090-0010 Y y y WBN-1-LPR -090-0014 Y y y WBN-1-LPR -090-0059 Y y WBN-1-LPR -090-0060 Y Y y WBN-1-LPR -090-0061 Y y WBN-1-LPR -090-0062 Y y WBN-1-LPR -090-01 06A-A y y Notes Only y y WBN-1-LPR -090-01 06B-A Counted with 106A y Notes Only y WBN-1-LPR -090-0106C-A Counted with 106A Notes Only y WBN-1-LPR -090-0112A-B y y Notes Only y Prepared: Richard Brehm Checked: Edward BradIey Page 16

Extending Channel Operational Test Frequency for Radiation Monitors WBN-EEB-EDQI090-99005 Rev. 0 Listing from EMPAC and Compilation of Programs Unid FSAR FSAR not Other Tech Spec aDeM Sampled Maintained Required Required for Unit 1 WBN-1-LPR -090-01128-8 Counted with 112A Y Notes Only y WBN-1-LPR -090-0112C-B Counted with 112A Notes Only y y WBN-1-LPR -090-0119 Y Y Y WBN-1-LFR -090-0120 Y y y WBN-1-LPR -090-0121 Y Y Y WBN-1-LPR -090-0123 Y y y WBN-1-LPR -090-0124 NoSSD WBN-1-LPR -090-0130-A Y Y Y Y WBN-1-LPR -090-0131-8 Y Y Y Y WBN-1-LPR -090-0170 NOT NoSSD WBN-1-LPR -090-0210 NoSSD WBN 1-LPR -090-0262 NoSSD WBN-1-LPR -090-0271-A Y Y Y WBN-1-LPR -090-0272-8 Y y y WBN-1-LPR -090-0273-A Y Y Y WBN-1-LPR -090-0274-8 Y y y y WBN-1-LPR -090-0275 Y y WBN-1-LPR -090-0276 Y y y WBN-1-LPR -090-0277 Y Y WBN-1-LPR -090-0278 Y y y WBN-1-LPR -090-0280 Y Y WBN 1-LPR -090-0290 Y Y Y WBN 1-LPR -090-0291 Y Y WBN 1-LPR -090-0292 Y Y Y WBN-1-LPR -090-0293 Y Y Prepared: Richard Brehm Checked: Edward Bradley Page 17

Extending Channel Operational Test Frequency for Radiation Monitors WBN-EEB-EDQID9D-99005 Rev. 0 Listing from EMPAC and Compilation of Programs Unid FSAR FSAR not Other Tech Spec ODeM Sampled Maintained Required Required for Unit 1 WBN-1-LPR -090-0400 Y Y y WBN-1-LPR -090-0404 Y Y WBN-1-LPR -090-0405 Same as 404 WBN-1-LPR -090-0421 y y y WBN-1-LPR -090-0422 y y y WBN-1-LPR -090-0423 y y y WBN-1-LPR -090-0424 y y WBN-1-LPR -090-0450 Same as 404 WBN-1-LPR -090-123/A Same as 123 WBN-1-LPR -999-0099 TLD - No SSD WBN-1-LPR -999-0100A TLD - No SSD WBN-1-LPR -999-0100B TLD - No SSD WBN-1-LPR -999-0100C TLD - No SSD WBN-1-LPR -999-0104 TLD - No SSD WBN-1-LPR -999-0403 TLD - No SSD WBN-2-LPR -090-0001 Y y y WBN-2-LPR -090-0002 NOT NoSSD WBN-2-LPR -090-0006 y y y WBN-2-LPR -090-0007 Y Y y WBN-2-LPR -090-0008 Y Y y WBN-2-LPR -090-0010 Y Y Y WBN-2-LPR -090-0014 NoSSD WBN-2-LPR -090-0059 NOT NoSSD WBN-2-LPR -090-0060 NOT NoSSD WBN-2-LPR -090-0061 NOT NoSSD Prepared: Richard Brehm Checked: Edward Bradley Page 18

Extending Channel Operational Test Frequency for Radiation Monitors WBN-EEB-EDQI090-99005 Rev, 0 Listing from EMPAC and Compilation of Programs Unid FSAR FSAR not Other Tech Spec ODCM Sampled Maintained Required Required for Unit 1 WBN-2-LPR -090-0062 NOT NoSSD WBN-2-LPR -090-0099 NOT NoSSD WBN-2-LPR -090-0100A NoSSD WBN-2-LPR -090-01008 NoSSD WBN-2-LPR -090-0100C No SSD WBN-2-LPR -090-0104 No SSD WBN-2-LPR -090-0106A-A NOT No SSD Notes Only WBN-2-LPR -090-01 06B-A No SSD Notes Only WBN-2-LPR -090-01 06C-A No SSD Notes Only WBN-2-LPR -090-0112A-B NOT No SSD Notes Only WBN-2-LPR -090-0112B-B No SSD Notes Only WBN-2-LPR -090-0112C-B No SSD Notes Only WBN-2-LPR -090-0119 NOT No SSD Y WBN-2-LPR -090-0120 NOT NoSSD Y WBN-2-LPR -090-0121 NOT NoSSD Y WBN-2-LPR -090-0123 Y Y WBN-2-LPR -090-0124 NOT NoSSD WBN-2-LPR -090-0130-A NOT NoSSD y WBN-2-LPR -090-0131-8 NOT NoSSD Y WBN-2-LPR -090-0170 NOT No SSD WBN-2-LPR -090-0210 No SSD WBN-2-LPR -090-0260-A No SSD WBN-2-LPR -090-0261-8 NoSSD WBN-2-LPR -090-0262 NoSSD WBN-2-LPR -090-0271-A NOT NoSSD Prepared: Richard Brehm Checked: Edward Bradley Page 19

Extending Channel Operational Test Frequency for Radiation Monitors WBN*EEB-EDQI090-99005 Rev, 0 Listing from EMPAC and Compilation of Programs Unid FSAR FSAR not Other Tech Spec ODCM Sampled Maintained Required Required for Unit 1 WBN-2-LPR -090-0272-8 NOT No SSD WBN-2-LPR -090-0273-A NOT No SSD WBN-2-LPR -090-0274-8 NOT No SSD WBN-2-LPR -090-0275 NOT No SSD WBN-2-LPR -090-0276 NOT No SSD WBN-2-LPR -090-0277 NOT No SSD WBN-2-LPR -090-0278 NOT No SSD WBN-2-LPR -090-0280 NOT No SSD WBN-2-LPR -090-0290 NOT No SSD WBN-2-LPR -090-0291 NOT No SSD WBN-2-LPR -090-0292 NOT No SSD WBN-2-LPR -090-0293 NOT No SSD WBN-2-LPR -090-0400 Y NoSSD y Y WBN-2-LPR -090-0402 Y NoSSD Y Y WBN-2-LPR -090-0405 No SSO WBN-2-LPR -090-0421 NOT NoSSD WBN-2-LPR -090-0422 NOT NoSSO WBN-2-LPR -090-0423 NOT NoSSO WBN-2-LPR -090-0424 NOT NoSSO WBN-2-LPR -090-0450 NoSSO WBN-2-LPR -090-123 fA Same as 123 WBN-2-LPR -999-0403 TLD-No SSD 77 Prepared: Richard Brehm Checked: Edward Bradley Page 20

Extending Channel Operational Test Frequency for Radiation Monitors WBN-EEB-EDQI090-99005 Rev. 0 Summary of Results The COT data was statistically sampled to detennine the perfonnance ofthe radiation monitors. The analysis has shown that to a 95/95 level of probability and confidence that the population of radiation monitors at WBN will repeat within the "as-left" band for a 3 month COT. This performance accuracy is better than expected. Conclusions The analysis ofthe COT data has shown that the radiation monitors at WBN are operating within the "as-left" band at the current test frequency. The calculational basis of 18 months is still completely valid starting at this time interval. Therefore, it is reasonable to extend the COT testing. The monitors required by Tech Spec and ODCM can conservatively move the COT to 9 months. Keep in mind that this is Y2 the calculational basis. All other monitors should move the COT test to the calculational basis of 18 months with the exception of flow switches on raw water systems and non VX-252 local indicators. These flow switches and local indicators should remain on their present cycle until the resolution ofPER 00-001766-000. ALTERNATE REVIEW (REF. 7 ) TVA's calibration program has feedback mechanisms built into the procedures to find instruments outside the nonn and to fine tune engineering basis data (SPP 6.7 section 3.2c.2, SPP 3.6, SPP 6.6 and NEDP 12). As part ofthis process the Radiation Monitor system engineer evaluated data on a device specific basis over the last 2+ years. The review ofreference 7 is summarized below. The system engineer detennined whether the instrument was found outside the "as-left" (OAL), outside the "as-found" (OAF), inoperative (INOP), or within the "as-left" (no entry). Remember that the instrument is working as predicted if it is found within the "as-found" tolerance. Similar devices/features were combined e.g. the analog ratemeters. This calculation's review further categorized the data by instrument type and sub group. For instance, recorders were broken down by Manufacturer and Model and the liquid flow switches were grouped by calibration interval. These groupings are attached. RATEMETER MODULES: There are two basic types ofRatemeter modules. One that measures pulses and one that measures current. There are similarities between these two types such as the indicator on the front and the bistable circuits. Prepared: Richard Brehm Checked: Edward Bradley Page 21

Extending Channel Operational Test Frequency for Radiation Monitors WBN-EEB-EDQI090-99005 Rev. 0 Common Items 1. Indicator: Twenty-four (24) monitors were sampled. Two-hundred-forty (240) COTs were evaluated. There were no indicators found outside the "as-found" criteria. There were eight (8) instances where an indicator point was found outside the "as-left". This is a 100% success rate. 2. Alert Bistable: Twenty-four (24) monitors were sampled. Two-hundred-forty (240) COTs were evaluated. There were no bistables found outside the "as-found" criteria. There was one (1) instance where a bistable was found outside the "as-left". This is a 100% success rate. 3. Hi Rad Bistable: Twenty-four (24) monitors were sampled. Two-hundred-forty (240) COTs were evaluated. There were no bistables found outside either the "as-found" or the "as-left"criteria. This is a 100% success rate. Unique Items: 1. High Voltage: Eleven (11) monitor were sampled. One hundred ten, (110), COTs were evaluated. There were no instances where the High Voltage was outside either the "as-found" or the "as-left". This is a 100% success rate. 2. Low Discriminator: Eleven (11) monitors were sampled. One hundred ten (110) COTs were evaluated. There were four (4) instances where the discriminator was outside the "as-found" and two (2) instances outside the "as-left". The entire out oftolerance instances was on two (2) monitors. There is no engineering basis for this value. The system engineer has determined the setting. The discriminator sets the signal to noise ratio for the monitor. The pulse height ofthe radiation received at the ratemeter is a function ofthe gain ofthe detector tube, the gain ofthe preamp, and the attenuation ofthe cable run. The value has been taken as a rule ofthumb and failures are not indicative ofunacceptable operation ofthe monitor for this study Proper operation can only be determined by using a source on the detector. The system engineer determined that the 101C monitor is not performing as expected and has initiated a work order to replace this module. Other than the iodine monitors there were no failures ofthe discriminator settings. 3. Upper Discriminator: All four (4) monitors that use this feature were evaluated. Forty-three (43) COTs were evaluated. There were seven (7) instances where the discriminator was outside "as-found" and one (1) instance outside "as-left". Six (6) ofthe OAF values were on one instrument. This function is not an engineered value. The value has been taken as a rule ofthumb and failures are not indicative of unacceptable operation ofthe monitor for this study. Electronically, there is no difference in the upper and lower setpoints. As stated previously, proper operation can only be determined by using a source on the detector. The system engineer determined that the 10IC monitor is not performing as expected and has initiated a work request (WR C340313) to replace this module. Other than the iodine monitors there were no failures ofthe discriminator settings. LOCAL INDICATOR: Fifty-eight (58) COTs, eight (8) instruments, one (1) COT inop, three (3) COT OAF, five (5) instruments with no failures. There is nothing significantly different in these instruments from the MCR or the VX 252 indicators. PER 00-001766-00 was written to resolve this problem. Prepared: Richard Brehm Checked: Edward Bradley Page 22

Extending Channel Operational Test Frequency for Radiation Monitors WBN-EEB-EDQ1090-99005 Rev. 0 DIGITAL RADIATION MONITOR: I. Monitor 52 COTs, 6 instruments. A database value was found incorrect. This is not a calibration error. 2. Flow Switch 19 COTs, 2 Instruments, 1 COT found outside the "as-found", all others were within the "as-left". This is a small data set but still shows a 95% success rate. COMPUTER: Eighteen (18) computer points were sampled. One-hundred-eighty-one (181) COTs were evaluated. One (1) point was found outside the "as-found" during a COT and the next point in the same COT was outside the "as-left". All others COTs were within the "as-left". This is a 99.4% success rate. The one failure is insignificant. RECORDERS: 1. Speedomax-M: Eleven (11) recorders were sampled. One-hundred-ten (110) COTs were evaluated. There were three instances where the recorder was outside "as-found", one (1) outside "as-left", and two (2) inop. All failures were on 3 recorders. All but one failure was corrected by "cleaning". The pen was seen to be stuck. This failure mode is best found by the source check and not a COT (Source checks are done at the discretion ofthe operations staff and procedurally at intervals less than COTs - Ref 4, 5, and 6). A review of maintenance history shows that indeed the operations staffhas found these recorders inoperative by this method and cleaning was the fix. Additionally, these are obsolete and are slated to be replaced (WBN MIL 519 - Plant Recorder System Replacement). 2. Speedomax-250: Two (2) recorders were sampled. Eighty-two (82) COTs were evaluated. There was one (1) instance where the recorder was found outside the "as-found". All other COTs were within the "as-left". This is a 98.8% success rate. The failure is statistically insignificant. 3. Yokogawa-UR1800: One (1) recorders were sampled. Forty eight (48) COTs were evaluated. There were no instances where the recorder was found outside either the "as-found" or the "as-left". This is a 100% success rate. Universal Flow Switch: 1. 92 day data: One (1) instrument, eleven (11) COTs, zero (0) OAF, four (4) OAL. This is a 100% success rate. 2. 18 month data: Seven (7) instruments, nineteen (19) COTs, four (4) OAF, three (3) OAL, four (4) instruments with no failures. The failures are on switches measuring ERCW system water. This is raw water and is a possible problem. Three (3) switches on Condenser Demineralizer or CCS system water showed no failures. The failures occurred on flow switches that are already on an 18 month calibration cycle. PER 00-001770-000 has been written to address this problem. VX-252: 20 COTs, 2 Instruments, No Failures, All within "as-left". CONCLUSION: The system engineer data helps confirm that the radiation system as a whole is working well. The feedback mechanism is in place (SPP 6.7 and NEDP 12) to evaluate and correct anomalous or mis-operating equipment. Prepared: Richard Brehm Checked: Edward Bradley Page 23

Extending Channel Operational Test Frequency for Radiation Monitors WBN-EEB-EDQI090-99005 Rev. 0 The analog ratemeters are working exceptionally well. There were no failures in the engineered features. One ratemeter was identified as being anomalous (but not inoperative) and is being replaced (WR C340313). Yokogawa and the Speedomax 250 recorders are working well. Three ofthe eleven Speedomax M recorders sampled showed problems. However, the problems found are best determined by source checks and not COTs. The failure mode was a stuck pen and the resolution was to clean the slidewire or contacts. A source check that is already performed on a more frequent basis than COTs is the preferred method for finding these failures. Additionally, these recorders have been identified by the obsolete equipment project to be replaced. Flow switches on raw water that are presently on 18 month intervals do show a problem. PER 00-001766-000 was written to address this problem. Local indicators have shown failures when the MCR and VX-252 indicators have shown no problems. There is no fundamental difference in movements ofthese devices. PER 00-001766-000 was written to address this problem. Prepared: Richard Brehm Checked: Edward Bradley Page 24

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1;1 _")--!-'i~ DATE 11~/5"-1& DATE PM FREQrnrncy: 1:;;: SECTION XI: WBN-EEB-EDQI090-99005 Rev_ 0 ~ .J> ~"~_-~:. ~ .~I** '.~ YBB () NO (X] YBS () NO (X) TIME LI~lIT: ~VDATORY,y COMPLIANCE: N COMMITMENT, N OTI{ER : \\r"'(4;,£&~~ 'QJ... Y.1I3 _ CRAFT RWP # LCO INSUL REQ, EO, N SCHEDULE DATE: 12/2~/99 LATE DATE: 12/29/99 111IY11l1l11l1ff 11111BIllHlillmoIIII/Ilill1lIIIIlUIliDII. No (X] 110 #: -------dJ;Z

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