ML032671143

From kanterella
Jump to navigation Jump to search
Submittal of Letter and Enclosures as the Annual Report Required by the Rinsc Technical Specifications (Section 6.8.4)
ML032671143
Person / Time
Site: Rhode Island Atomic Energy Commission
Issue date: 08/05/2003
From: Marlone Davis
State of RI, Atomic Energy Comm
To: Mendonca M
NRC/NRR/DRIP/RORP
References
Download: ML032671143 (18)
v • d • e


Text

STATE OF RHODE ISLAND AND PROVIDENCE PLANTATIONS RHODE ISLAND ATOMIC ENERGY COMMISSION Rhode Island Nuclear Science Center 16 Reactor Road Narragansett, RI 02882-1165 August 5, 2003 Docket No. 50-193 Mr. Marvin Mendonca, Senior Project Manager Non-Power Reactors, Decommissioning and Environmental Project Directorate Division of Reactor Projects - IllE!V/V U.S. Nuclear Regulatory Commission (NRC)

Washington, D.C. 20555

Dear Mr. Mendonca,

This letter and enclosures constitute the annual report required by the RINSC Technical Specifications (Section 6.8.4). Enclosure I provides reactor operating statistics. Enclosure 2 provides information pertaining to inadvertent reactor shutdowns or scrams. Enclosure 3 discusses maintenance operations performed during the reporting period. Enclosure 4 describes changes to the facility carried out under the conditions of Section 50.59 of Chapter 10 of the Code of Federal Regulations. Lastly, Enclosure 5 summarizes the radiological controls information. If there are any questions regarding this information, please call me at 401-789-9391.

Sincerely, Michael J. Davis Reactor Supervisor Enclosures (5)

Copy to:

Mr. Craig Bassett, USNRC Region I Dr. Harry Knickle, Chairman NRSC Dr. Vincent Rose, Chairman RIAEC Dr. Bruno Giletti, RIAEC Dr. Stanley J. Pickart, RIAEC Dr. Stephen Mecca, RIAEC Dr. Alfred L. Allen, RIAEC

ENCLOSURE I Technical Specifications Section 6.8.4.a (01-02)

Reactor Energy Energy Critical Generated Generated Month (hours) (MWh) (MWd)

July-02 12.90 25.70 1.07 August-02 26.50 52.90 2.20 September-02 16.90 30.80 1.28 October-02 27.00 53.90 2.25 November-02 17.20 31.40 1.31 December-02 19.70 38.80 1.62 January-03 11.90 21.90 0.91 February-03 17.60 34.60 1.44 March-03 24.50 46.00 1.92 April-03 18.00 33.30 1.39 May-03 32.40 61.80 2.58 June-03 20.10 36.10 1.50 2002-03 Totals: 24.70 .6 467.20 19.47 Total Energy Output Since Initial Criticality 8 58,533.01 2,438.88

V -

ENCLOSURE I (Continued)

NSC-78 Monthly Information Sheet NSC-78 IMonth: Jul-02 I I Revised 5/8/02 Cumulative MWH's TOTAL LEU I Start: 58,065.67 I End: 58.091.401 8,383.98 I

  • added HFU=49698.01 Staqck Calibration Factor = 4-375E-9 Run Ave Pwr Start S/D Operating Todays Stack Ar-41 Releases No. Day Level Time Time Time total Monitor LImitu1.0E-03 uCcc (1-31) (JW) (hhmm) (hhmm) (hrs) MWH max CPM uClcc %of Llmit 7504 2 2.00 0908 1025 1.28 2.57 7,000 3.06E-05 3.06 7505 9 2.00 0909 1015 1.10 2.20 6,000 2.63E-05 2.63 7506 11 2.00 1119 1432 3.22 6.43 7,000 3.06E-05 3.06 7507 16 2.00 0858 1020 1.37 2.73 7,000 3.06E-05 3.06 7508 18 2.00 1040 1338 2.97 5.93 8,000 3.50E-05 3.50 7509 23 2.00 0934 1015 0.68 1.37 6,000 2.63E-05 2.63 7510 25 2.00 1032 1152 1.33 2.67 5,000 2.19E-05 2.19 7511 29 7512 30 2.00 1028 1123 0.92 1.83 6,000 2.63E-05 2.63 Totals: _ 12.87 25.73 2.28E-04 22.75

SUMMARY

- I' -il I. - Y Operating Max. I Actual Max. I Actual Hours 147.0 1 12.91 MWH's:I 294.0 25.7 Percentage 1 9% 1 1 9%

Stack Releases 22.8 curies ___I

- a ENCLOSURE 1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 I Month: Aug-02 I Revised 5/8/02 Cumulative MWH's TOTAL LEU r . ~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~

. _ . __. _ __ _~~~~~~~~~~~~~~~~~~~~~~~~~~~~

I Start: 58,091.401 I End: 158,144.331 8,436.91 l

  • added HEU=49698.01 Stack Calibration Factor = 4.375E-9 Run Ave Pwr Start SID Operating Todays Stack Ar-41 Releases No. Day Level Time Time Time total Monitor Limit z 1.OE-03 uCVcc (1-31) (W) (hhmm) (hrs) MWH maxCPM uCIcc %of ulit 7513 1 2.00 0926 1026 1.00 2.00 6,000 2.63E-05 2.63 7514 6 2.00 0935 1235 3.00 6.00 6,000 2.63E-05 2.63 7515 8 2.00 1105 1410 3.08 6.17 6,000 2.63E-05 2.63 7516 13 2.00 1039 1228 1.82 3.63 6,000 2.63E-05 2.63 7517 15 2.00 0900 1530 6.50 13.00 7,000 3.06E-05 3.06 7518 20 2.00 0912 1216 3.07 6.13 6,000 2.63E-05 2.63 7519 22 2.00 1052 1351 2.98 5.97 6,000 2.63E-05 2.63 7520 27 2.00 0915 1152 2.62 5.23 7,000 3.06E-05 3.06 7521 29 2.00 1050 1314 2.40 4.80 7,000 3.06E-05 3.06 Totals: 26.47 52.93 2.49E-04 _

SUMMARY

Operating Max. Actual Max. Actual Hours 1 154.0 26.5 MWH's: 308.0 52.9 Percentage 1 17% j_______ 17%

Stack Releases JI

4 S ENCLOSURE 1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 I Month: Sep-02 I Revised 5/8/02 Cumulative MWH's TOTAL LEU Start: 58,144.33 l End: 58,175.091 8,467.67 l

  • added HEU=49698.01 Stack Calibration Factor = 4.375E-9 Run Ave Pwr Start S/D Operating Todays Stack Ar41 Releases No. Day Level Time Time Time total Monitor Limit =1.OE-03 uCVcc (1-1) (W) (hhmm) (hhmm) (hrs) MVVH max CPM uCVcc  % of Limit 7522 3 2.00 0929 1108 1.65 3.30 6,000 2.63E-05 2.63 7523 10 2.00 1007 1309 3.03 6.07 11,000 4.81 E-05 4.81 7524 12 2.00 1107 1411 3.07 6.13 11,000 4.81 E-05 4.81 7525 17 2.00 0911 1344 4.55 9.10 11,000 4.81E-05 4.81 7526 24 2.00 1010 1201 1.85 3.70 10,000 4.38E-05 4.38 7527 25 0.10 1618 1751 1.55 0.16 1,000 4.38E-06 0.44 7528 1 26 2.00 1050 1159 1.15 2.30 11,000 4.81 E-05 4.81 Totals: 16.85 30.76 2.67E-04 26.69

SUMMARY

Operating [ Max. Actual I Max. Actual Hours l 133.0 16.9 MWH's

_ 266.0 30.8 Percentage 113% _ _ 12%

ENCLOSURE I (Continued)

NSC-78 Monthly Information Sheet NSC-78 I Month: Oct-02 I Revised 5/8/02 Cumulative MWH's TOTAL LEU l Start: 58,175.091 I End: 58,229.02j 8,521.60 l

  • addpd HFU=4998.01 Staifk ibrafinn Factnr = A47-9 Run Ave Pwr Start SID Operating Todays Stack Ar-41 Releases No. Day Level Time Time Time total Monitor Umit = 1.CE-03 uCi/ce (1431) (MW) (hhmm) (hhmm) -(h) MWH max CPM uClVcc %of Limit 7529 1 2.00 0858 1117 2.32 4.63 11,000 4.81 E-05 4.81 7530 3 2.00 1040 1251 2.18 4.37 10,000 4.38E-05 4.38 7531 8 2.00 1032 1334 3.03 6.07 11,000 4.81 E-05 4.81 7532 10 2.00 1059 1154 0.92 1.83 10,000 4.38E-05 4.38 7533 15 2.00 0914 1140 2.43 4.87 12,000 5.25E-05 5.25 7534 17 2.00 1039 1229 1.83 3.67 12,000 5.25E-05 5.25 7535 22 2.00 0925 1122 1.95 3.90 13,000 5.69E-05 5.69 7536 24 2.00 1036 1225 1.82 3.63 12,000 5.25E-05 5.25 7537 29 2.00 0941 1620 6.65 13.30 12,000 5.25E-05 5.25 7538 31 2.00 1037 1427 3.83 7.67 12,000 5.25E-05 5.25 Totals: 26.97 53.93 5.03E-04 50.31

SUMMARY

Operating Max. Actual Max. Actual Hours 154.0 27.0 MWH's: 308.0 53.9 Percentage 18% 18% I Stack Releases 50.3 curies

ENCLOSTJ 1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 l Month: Nov-02 I Reised 5/8/02 Cumulative MWH's TTAL LEU Start: 58,229.02 End: 158,260.381 8,552.96

  • added HEU=49698.01 Stack Calibration Factor = 4.375E-9 Run Ave Pwr Start SID Operating Todays Stack Ar-41 Releases No. Day Level Time Time Time total Monitor Limit = 1.OE-03 uCIcc (1.31) W) (hhmm) (hhmm) r IWH max CPM uCIcc %of UmRt 7539 4 2.00 1054 1245 1.85 3.70 12,000 5.25E-05 5.25 7540 7 2.00 1024 1129 1.08 2.17 12,000 5.25E-05 5.25 7541 7 2.00 1506 1546 0.67 1.33 12,000 5.25E-05 5.25 7542 12 1.90 1057 1210 1.22 2.31 12,000 5.25E-05 5.25 7543 14 1.90 0953 1554 6.02 11.43 13,000 5.69E-05 5.69 7544 19 2.00 0923 1102 1.65 3.30 13,000 5.69E-05 5.69 7545 21 2.00 1038 1300 2.37 4.73 15,000 6.56E-05 6.56 7546 26 2.00 0910 1018 1.13 2.27 13,000 5.69E-05 5.69 7546 26 0.10 1028 1138 1.17 0.12 2,000 8.75E-06 0.88 Totals: 17.15 31.36 4.55E-04 45.50

SUMMARY

Operating [Max. Actual Max. Actual Hours . 140.0 17.2 MWH's:I 280.0 l 31.4 Percentage 112% l 11%

Stack Releases 45.5 curies l

ENCLOSURE I (Continued)

NSC-78 Monthly Information Sheet NSC-78 IMonth: Dec-02 I Revised 5/8/02 Cumulative MWH's TOTAL LEU I

I Start: 58.260.381 I End: 158,299.141 8,591.72 1

  • added HEU=49698.01 Stack Calibration Factor = 4.375E-9 Run Ave Pwr Start SJD Operating Todays Stack Ar-41 Releases No. Day Level Time Time Time total Monitor Limit
  • 1.CE-03 uCicc (1-31) NW) (hhmm) (hhmm) (hrs) MWH max CPM uCi/cc  % of Limit 7547 3 2.00 0932 1452 5.33 10.67 12,000 5.25E-05 5.25 7548 5 2.00 1037 1140 1.05 2.10 12,000 5.25E-05 5.25 7549 10 2.00 0909 1002 0.88 1.77 13,000 5.69E-05 5.69 7550 12 2.00 1042 1342 3.00 6.00 12,000 5.25E-05 5.25 7551 17 2.00 0905 1051 1.77 3.53 14,000 6.13E-05 6.13 7552 19 2.00 1102 1218 1.27 2.53 15,000 6.56E-05 6.56 7553 26 1.90 0942 1428 4.77 9.06 14,000 6.13E-05 6.13 7554 31 1.90 0904 1042 1.63 3.10 14,000 6.13E-05 6.13 Totals: 19.70 38.76 4.64E-04 46.38

SUMMARY

Operating Max. Actual _ Max. Actual Hours 140.0 19.7 MWH's: 280.0 1 38.8 Percentage 14% i .1 14%

Stack Releases 46.4 curies

- - 4 iw-ENCLOSURE 1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 I Month: Jan-03 I I Revised 5/15/01 l Cumulative MWH's TOTAL LEU Start: 58,299.14 End: 158,321.091 8,623.08 added HEU=49698.01 Run Ave Pwr Start SID Operating Todays Stack Ar-41 Released No. Day Level Time Time Time total Monitor Umit - 4E-4 uCI/cc (1-31) (PW (hhmm) (hhmm) (hrs) MWH max CPU uCUcc Cl/day 7555 7 1.95 0927 1120 1.88 3.67 13,000 3.95E-05 0.06 7556 9 1.90 1107 1412 3.08 5.86 15,000 4.56E-05 0.10 7557 14 1.90 0919 1016 0.95 1.81 14,000 4.26E-05 0.03 7558 21 1.90 0931 1034 1.05 2.00 15,000 4.56E-05 0.04 7559 23 1.90 1114 1245 1.52 2.88 15,000 4.56E-05 0.05 7560 28 0.01 1517 1542 0.42 0.00 1,000 3.04E-06 0.00 7561 30 1.90 0935 1236 3.02 5.73 15,000 4.56E-05 0.10 Totals: 11.92 21.95 _ _ 2.68E-04 0.38

SUMMARY

Operating Max. Actual [ l Max. Actual Hours [ 147.0 11.9 l MWH's:l 294.0 21.9 Percentage 8% 7%

Stack Releases 0.4 curies

ENCLOSURE I (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: Feb-03 Revised 5/15/01 Cumulative MWH's TOTAL LEU I Start: 58,321.09 l End: 158,355.741 8,657.73 l added HEU=49698.01 Run Ave Pwr Start SID Operating Todays Stack Ar-41 Released No. Day Level Time Time Time total Monitor Umit = 4E-4 uClcc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH max CPM uCIcc CIday 7562 4 1.90 1045 1216 1.52 2.88 14,000 4.26E-05 0.05 7563 6 1.90 0938 1238 3.00 5.70 15,000 4.56E-05 0.10 7564 11 2.00 1108 1219 1.18 2.37 17,000 5.17E-05 0.05 7565 13 2.00 1114 1414 3.00 6.00 18,000 5.47E-05 0.12 7566 20 2.00 1038 1329 2.85 5.70 17,000 5.17E-05 0.11 7567 25 2.00 0943 - 1243 3.00 6.00 16,000 4.86E-05 0.11 7568 27 2.00 1047 1347 3.00 6.00 17,000 5.17E-05 0.12 Totals: _____ 17.55 34.65 3.47E-04 0.65

.~~~ ~ ~ ~ ~ I .

SUMMARY

Operating l Max. Actual Max. Actual Hours 140.0 17.6 MWH's: 280.0 34.6 Percentage 13% 4_ 12%

Stack Releases 0.7 curies

ENCLOSURE 1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: Mar-03 I Revised 5/15/01 Cumulative MWH's TOTAL LEU l Start: 58,355.741 l End: 58,401.771 8,694.35

  • added HEU=49698.01 Calibration Factor = 0.00049 Run Ave Pwr Start SID Operating Todays Stack Ar.41 Released No. Day Level Time Time Time total Monitor Limit = 4E-4 uClIcc

-31) (MW ) (hhmm) (hhmm) (hrs) MWH max CPM uCVcc CUday 7569 4 1.85 0937 1243 3.10 5.74 16,000 4.86E-05 0.11 7570 6 1.95 0942 1249 3.12 6.08 16,000 4.86E-05 0.11 7571 11 1.85 0953 1255 3.03 5.61 15,000 4.56E-05 0.10 7572 13 1.85 1100 1400 3.00 5.55 15,000 4.56E-05 0.10 7573 18 1.85 0959 1300 3.02 5.58 15,000 4.56E-05 0.10 7574 20 2.00 1034 1347 3.22 6.43 15,000 4.56E-05 0.11 7575 25 1.85 1000 1300 3.00 5.55 15,000 4.56E-05 0.10 7576 27 1.80 1027 1330 3.05 5.49 15,000 4.56E-05 0.10 4 4. 4 4. 4 4 4. j. 4

4. .1 4 4 I. 4 4 4. 4 4. 4 4 4 4. 4
4. 4 9 4 4 4 9 7
1. 4 1. .4 4 4 I. 4

.1 1. 4 4. 4 4 4 4. 4 4 4. 4 4. 4 .4 4 4. 4 4 4. 4 4. 4 4 4 I. 4 4 9 4 9 4 4 4 I 7 4 4. 4 4. 4 -4 4. j. 4.

4 4. 4 4. 4 4 4 4. 4 4 4. 4 4. 4 4 4 4. 4 4 4. 4 4. 4 4 4. 4. 4

.1 1. .1 I.-4 4 4 4. 4 Totals: 24.53 46.03 3.71 E-041 0.85

SUMMARY

Operating Max. Actual Max. Actual Hours 147.0 24.5 MWH's: 294.0 46.0 Percentage 17% 16%

Stack Releases 0.8 curies

ENCLOSURE I (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: Apr-03 Revised 5/15/01 Cumulative MWH's TOTAL LEU I Start: 58,401.771 I End: 58,435.031 8,727.61

  • added HEU=49698.01 Run Ave Pwr Start SID Operating Todays Stack Ar-41 Released No. Day Level Time Time Time total Monitor Limit a 4E-4 uCI/cc (1431) (MW) (hhmm) (hhmm) (hrs) MWH max CPM uClcc Clday 7577 1 2.00 0935 1030 0.92 1.83 15,000 4.56E-05 0.03 7578 3 1.95 1034 1334 3.00 5.85 10,000 3.04E-05 0.07 7579 8 2.00 0959 1059 1.00 2.00 9,000 2.74E-05 0.02 7580 9 0.005 1006 1041 0.58 0.00 0.50 1.52E-09 0.00 7581 10 2.00 1042 1212 1.50 3.00 9,000 2.74E-05 0.03 7582 15 2.00 1037 1222 1.75 3.50 10,000 3.04E-05 0.04 7583 17 2.00 0918 1137 2.32 4.63 11,000 3.34E-05 0.06 7584 22 1.95 1048 1328 2.67 5.20 10,000 3.04E-05 0.06 7585 24 1.95 1043 1126 0.72 1.40 9,000 2.74E-05 0.01 7586 28 0.005 1037 1110 0.55 0.00 600 1.82E-06 0.00 7587 29 1.95 0900 1200 3.00 5.85 10,000 3.04E-05 0.07 Totals: 18.00 33.27 2.85E-04 0.39

SUMMARY

Operating Max. Actual Max. Actual Hours 154.0 18.0 j MWVH's:j 308.0 33.3 Percentage l 12% 4 11%

Stack Releases 0.4 curies

ENCLOSURE I (Continued)

NSC-78 Monthly Information Sheet NSC-78 I Month: May-03 lI RevIsed 5/8/02 Cumulative MWH's TOTAL LEU Start: 58,435.031 End: l 58,496.87 8,789.45 l

'added HEU=49698.01 Stack Calibration Factor = 4.375E-9 Run Ave Pwr Start SID Operating Todays Stack Ar.41 Released No. Day Level Tlme Time Time total Monitor Limit = 1.0E-03 uCIcc (1-31) ( (hhmm) (hrs) MWH maxCM UCc %of Limit 7588 1 1.90 0944 1618 6.57 12.48 10,000 4.38E-05 4.38 7589 2 2.00 1100 1730 6.50 13.00 10,000 4.38E-05 4.38 7590 5 0.10 1031 1106 0.58 0.06 1,100 4.81 E-06 0.48 7591 6 7592 6 2.00 0938 1243 3.08 6.17 10,000 4.38E-05 4.38 7593 8 2.00 0942 1130 1.80 3.60 9,000 3.94E-05 3.94 7594 13 2.00 0933 1233 3.00 6.00 10,000 4.38E-05 4.38 7595 15 2.00 1016 1352 3.60 7.20 10,000 4.38E-05 4.38 7596 20 2.00 0912 1012 1.00 2.00 10,000 4.38E-05 4.38 7597 22 2.00 1033 1203 1.50 3.00 I 10,000 4.38E-05 4.38 7598 27 2.00 0915 1025 1.17 2.33 9,000 3.94E-05 3.94 7599 27 2.00 1114 1256 1.70 3.40 9,000 3.94E-05 3.94 7600 28 0.10 1000 1040 0.67 0.07 1,000 4.38E-06 0.44 7601 29 2.00 1022 1138 1.27 2.53 9,000 3.94E-05 3.94 Totals: _- - - 32.43 61.84 4.73E-04 _

iUMMARY Operating Max. Actual l_ __ Max. Actual Hours 147.0 32.4 MWH's: 294.0 61.8 Percentage _ _ 22%1 _ 21%

Stack Releases curies

I-ENCLOSURE 1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 J Month: Jun-03 I evised 5/8/02 l Cumulative MWH's TOTAL LEU l Start: 58,496.87 l End: 158,533.01 8,825.59 l

  • added HEU=49698.01 Stack Calibration Factor = 4.375E-9 Run Ave Pwr Start S/D Operating Todays Stack Ar-41 Released No. Day Level Time Time Time total Monitor Umit
  • 1.OE-03 uCicc l (1-31) MW) (hhmm) (hhmm) (hs) MWH max CPM uCifcc r % of UmHt 7602 3 1.95 0930 1233 3.05 5.95 10,000 4.38E-05 4.38 7603 4 0.05 0930 1010 0.67 0.03 900 3.94E-06 0.39 7604 5 2.00 1031 1432 4.02 8.03 10,000 4.38E-05 4.38 7605 10 2.00 0914 1014 1.00 2.00 10,000 4.38E-05 4.38 7606 11 0.10 1000 1106 1.10 0.11 1,000 4.38E-06 0.44 7607 17 2.00 0930 1230 3.00 6.00 10,000 4.38E-05 4.38 7608 19 2.00 1023 1323 3.00 6.00 9,000 3.94E-05 3.94 7609 24 1.85 0938 1129 1.85 3.42 9,000 3.94E-05 3.94 7610 25 1.85 1422 1518 0.93 1.73 9,000 3.94E-05 3.94 7611 26 2.00 1030 1156 1.43 2.87 9,000 3.94E-05 3.94 Totals: 20.05 36.14 3.41 E-04 34.08

SUMMARY

Operating Max. Actual Max. Actual Hours 147.0 20.1 j MWH's: 294.0 36.1 Percentage 14% _ 12%

Stack Releases 34.1 curies  ;

r ENCLOSURE 2 EMERGENCY SHUTDOWNS AND SCRAMS The following is a listing of the emergency shutdowns and inadvertent scrams, including the reasons, which occurred during the 2002-2003 reporting period. This information is required by Technical Specification 6.8.4.b.

DATE RUN # LOGBOOK I PAGE CAUSE 7/11/02 7506 50/ 144 Dropped Blade #1 due to magnet misalignment.

8/22/02 7519 51/11 Reactor scram caused by short period on the Log N

__________ channel due to noise.

9110/02 7523 51 / 16 Reactor scram caused by operator error - power level switch not set to 2 MW.

9/12/02 7524 51/ 18 Reactor scram caused by short period on the Log N channel due to noise.

9/24/02 7526 51/21 Reactor scram caused by short period on the Log N channel due to noise.

9/26/02 7528 51/23 Reactor scram caused by short period on the Log N channel due to noise.

10/8/02 7531 51/26 Reactor scram caused by operator error - power level switch not set to 2 MW.

10/10/02 7532 51/28 Reactor scram caused by short period on the Log N channel due to noise.

1/23/03 7559 51 / 56 Reactor scram when switching from cooling loop #1 to cooling loop #2.

3/13/03 7572 51 / 69 Dropped Blade #1 due to magnet misalignment.

4/22/03 7584 51/ 79 Reactor scram caused by short period on the Log N channel due to noise.

5/1/03 7588 51/ 82 Reactor scram caused by operator error - power level switch not set to 2 MW.

5/6/03 7591 51/ 85 Reactor scram when adjusting the detector for Power Level Channel #1.

5/27/03 7598 51 / 89 Reactor scram caused by seismic channel over sensitivity due to re-calibration.

The most frequent cause of emergency shutdowns and scrams is a short period scram caused by noise on the Log N Period channel. However, the number of these scrams has been reduced from thirty two for FYO1/02 to six for FY02/03, despite the fact that the operating schedule has not changed significantly. We replaced the connector between the detector and the instrumentation, and assume that this has contributed toward solving this problem.

ENCLOSURE 3 The following is a listing of the major maintenance operations performed in the 2002-2003 reporting period which includes impact upon the safe operation of the reactor and the reksons for corrective maintenance.

This information is required by Technical Specification 6.8.4.c.

During the 2002-2003 reporting period, there were no major maintenance operations performed.

ENCLOSURE 4 FACILITY CHANGES - 10CFR50.59 REVIEW The following is a listing and description of IOCFR50.59 evaluations conducted during the 2002-2003 reporting period. This information is required by Technical Specification 6.8.4.d.

There were no 10CFR50.59 evaluations conducted during this reporting period.

ENCLOSURE 5' RADIOLOGICAL CONTROLS

1. Environmental Surveys Outside the Facility - Technical Specification 6.8.4.e Quarterly OSL' badges are deployed outside the reactor building in thiee separate locations. The general public does not frequent these locations and therefore occupancy factors may be used to approximate annual dose. The allowable external dose rates must be below 50 mrem per year. The quarterly doses in units of mrem are shown in the table below.

LOCATION l 3" QTR 2002 41" QTR 2002 lQTR 2003 Il 2N" QTR 2O03 Northeast Wall 35 30 24 32 Demineralizer 77 68 62 89 Door Heat Exchanger 17 7 7 34 Door These areas are in locations where access is limited. Consequently, the general public will not frequent these areas, and appropriate occupancy factors can be used to approximate annual dose. Assuming that the maximum time that a member of the general public would be present in one of these locations is 15 minutes per day, an occupancy factor of 0.01 can be used to obtain the annual dose that would be received by a member of the general public, in any of these areas.

The dose rate in the Northeast Wall area is due to storage of RAM, and is present regardless of reactor operation. Applying the occupancy factor, the annual dose to an individual in this area would be 1.21 mrem over the course of last year. The annual dose rate at the Demineralizer and Heat Exchanger Doors is dependent on the operations schedule of the reactor. Ignoring the fact that the dose rate is not present 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> per day, and applying the occupancy factor of 0.01, the annual dose that would be received by an individual at the Demineralizer Door would be 2.96 mrem. Likewise the dose received at the Heat Exchanger Door would be 0.07 mrem.

2. Annual Exposures Exceeding 500 mrem - Technical Specification 6.8.4.f There were no personnel exposures greater than 500 mrem.
3. Radioactive Effluents - Technical Specification 6.8.4.g A. Gaseous effluent concentrations are documented on the Monthly Information Sheets (Form NSC-
78) enclosed. The gaseous effluents, primarily Argon-41, were less than 5% of the 10 CFR 20, Appendix B, Table 2, Column I effluent limits.

B. Liquid effluent concentrations released to the sewer are documented on the Sewer Disposal Record (Form NSC-52) and/or the Liquid Release Record (Form NSC-17). . No liquids were discharged during the reporting period.

'Optically Stimulated Luminescence 2 Landauer reads the OSL dosimeters to I mrem.

Retrieved from "https://kanterella.com/w/index.php?title=ML032671143&oldid=2643987"