ML022600257

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Forward the Annual Report Required by the Rinsc Technical Specifications Re Reactor Operating Statistics
ML022600257
Person / Time
Site: Rhode Island Atomic Energy Commission
Issue date: 08/26/2002
From: Simoneau W
State of RI
To: Mendonca M
Division of Regulatory Improvement Programs
References
Download: ML022600257 (19)
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Text

PLANTATIONS Rhode Island Atomic Energy Commission NUCLEAR SCIENCE CENTER 16 Reactor Road Narragansett, R.I. 02882-1165 August 26, 2002 Docket No. 50-193 Mr. Marvin Mendonca, Senior Project Manager Non-Power Reactors, Decommissioning and Environmental Project Directorate Division of Reactor Projects - III/IV/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 1 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, Wayne Stmoneau Assistant Director WS:jd 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-01 13.28 24.62 1.03 August-01 29.65 53.37 2.22 September-01 9.25 17.40 0.73 October-01 20.13 36.99 1.54 November-01 15.77 28.84 1.20 December-01 23.20 42.25 1.76 January-02 24.05 45.13 1.88 February-02 17.12 29.46 1.23 March-02 15.95 31.84 1.33 April-02 13.70 26.65 1.11 May-02 17.87 33.28 1.39 June-02 15.23 4-30.47 1.27 I

2000-01 Totals: 215.20 400.30 16.68 Total Energy Output since Initial Criticality: 58,065.66 2,419.4'0

ENCLOSURE I (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: Jul-01 I I Revised 5/15/01 Cumulative MWH's TOTAL LEU Start: 57,665.361 1 End: 157,689.981 7,991.97

  • added HEU=49698.01 Run Ave Pwr Start SID Operating Todays Stack Ar-41 Released No. Day Level Time Time Time total Monitor Limit= 4E-4 uCVcc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH max CPM uCi/cc Cl/day 7396 3 1.85 0904 1144 2.67 4.93 9,000 2.74E-05 0.05 7397 5 1.85 0855 0907 0.20 0.37 7,000 2.13E-05 0.00 7398 10 1.85 0853 1054 2.02 3.73 8,000 2.43E-05 0.04 7399 13 1.85 0902 0935 0.55 1.02 1,000 3.04E-06 0.00 7400 17 1.85 1041 1146 1.08 2.00 9,000 2.74E-05 0.02 7401 19 1.90 1041 1132 0.85 1.62 1,000 3.04E-06 0.00 7402 24 1.85 1054 1150 0.93 1.73 7,000 2.13E-05 0.01 7403 26 1.85 1040 1237 1.95 3.61 8,000 2.43E-05 0.04 7404 31 1.85 0916 1218 3.03 5.61 9,000 2.74E-05 0.06 Totals: 13.28 24.62 1.79E-04

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 13.3 MWH's: 280.0 24.6 Percentage 9% 9%

ENCLOSURE I (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: Aug-01 I I Revised 5/15/01 Cumulative MWH's TOTAL LEU I Start: 57,689.981 1 End: 57,743.35 8,045.34

  • added HEU=49698.01 Run Ave Pwr Start S/D Operating Todays Stack Ar-41 Released No. Day Level Time Time Time total Monitor Limit = 4E-4 uCi/cc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH max CPM uCi/cc CMday 7405 1 1.65 1019 1200 1.68 2.78 9,000 2.74E-05 0.03 7406 2 1.80 0912 1037 1.42 2.55 8,000 2.43E-05 0.03 7407 7 1.85 0915 1122 2.12 3.92 8,000 2.43E-05 0.04 7408 9 1.80 0926 1233 3.12 5.61 8,500 2.58E-05 0.06 7409 14 1.80 0902 1434 5.53 9.96 8,500 2.58E-05 0.11 7410 16 1.80 0907 1408 5.02 9.03 9,000 2.74E-05 0.10 7411 21 1.80 0908 1141 2.55 4.59 8,000 2.43E-05 0.05 7412 23 1.80 0913 1208 2.92 5.25 8,000 2.43E-05 0.05 7413 28 1.85 0911 1210 2.98 5.52 8,000 2.43E-05 0.05 7414 30 1.80 0917 1136 2.32 4.17 9,000 2.74E-05 0.05 Totals: 29.65 53.37 2.55E-04

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 29.7 MWH's: 280.0 53.4 Percentage 21% 19%

ENCLOSURE1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 FMonth: Sep-01 I I Revised 5/15/01 Cumulative MWH's TOTAL LEU I Start: 57.743.351 I End: I 57,760.75 I 8,062.74 I

  • added HEU=49698.01 Run Ave Pwr Start S/D Operating Todays Stack Ar-41 Released No. Day Level Time Time Time total Monitor Limit = 4E-4 uClIcc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH max CPM uCVcc CI/day 7415 4 1.90 0911 0951 0.67 1.27 7,500 2.28E-05 0.01 7416 6 1.80 0907 0949 0.70 1.26 7,000 2.13E-05 0.01 7417 11 1.90 1131 1151 0.33 0.63 8,000 2.43E-05 0.01 7418 13 1.90 1135 1335 2.00 3.80 8,000 2.43E-05 0.04 7419 19 1.90 0918 1241 3.38 6.43 8,000 2.43E-05 0.06 7420 20 1.80 0858 0939 0.68 1.23 8,000 2.43E-05 0.01 7421 25 1.90 0851 0933 0.70 1.33 8,000 2.43E-05 0.01 7422 27 1.85 1030 1117 0.78 1.45 7,000 2.13E-05 0.01 Totals: 9.25 17.40 1.87E-04

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 9.3 MWH's: 280.0 17.4 Percentage 7% 6%

ENCLOSURE 1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: Oct-01 I I sevised 5/15/01 Cumulative MWH's TOTAL LEU I !tirt: 77O7I I End: I 57.797.74 I 8.099.73 I I I Strt .... .77...60751- - "I

  • added HEU=49698.01 Run Ave Pwr Start S/D Operating Todays Stack Ar-41 Released No. Day Level Time Time Time total Monitor Limit = 4E-4 uCI/cc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH max CPM uCVcc Ci/day 7423 2 1.90 1029 1051 0.37 0.70 8,000 2.43E-05 0.01 7424 4 1.85 1017 1100 0.72 1.33 7,000 2.13E-05 0.01 7425 9 1.85 1053 1210 1.28 2.37 10,000 3.04E-05 0.03 7426 11 1.95 1044 1141 0.95 1.85 10,000 3.04E-05 0.02 7427 16 1.95 1054 1121 0.45 0.88 8,000 2.43E-05 0.01 7428 18 1.90 1051 1236 1.75 3.33 10,000 3.04E-05 0.04 7429 23 1.85 1049 1215 1.43 2.65 8,000 2.43E-05 0.03 7430 24 1.85 1316 1628 3.20 5.92 7,000 2.13E-05 0.05 7431 26 1.80 1053 1353 3.00 5.40 7,000 2.13E-05 0.05 7432 30 1.80 1044 1743 6.98 12.57 10,000 3.04E-05 0.16 Totals: 20.13 36.99 2.58E-04

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 20.1 MWH's:j 280.0 37.0 Percentage 14% 13%

ENCLOSURE 1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: Nov-01 I I Revised 5/15/01 Cumulative MWH's TOTAL LEU I

I Start: 57.797.741 I Strt 57,7I97."741 I End: I 57,826.58 I 8,128.57 I

  • added HEU=49698.01 Run Ave Pwr Start S/D Operating Todays Stack Ar-41 Released No. Day Level Time Time Time total Monitor Limit = 4E-4 uCi/cc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH max CPM uCi/cc ClIday 7433 1 1.90 1035 1149 1.23 2.34 6,000 1.82E-05 0.02 7434 6 1.65 0948 1109 1.35 2.23 9,000 2.74E-05 0.03 7435 8 1.90 1151 1455 3.07 5.83 10,000 3.04E-05 0.07 7436 13 1.85 1153 1301 1.13 2.10 7,000 2.13E-05 0.02 7437 15 1.85 1055 1426 3.52 6.51 10,000 3.04E-05 0.08 7438 20 1.80 1050 1125 0.58 1.05 8,000 2.43E-05 0.01 7439 26 1.80 1047 1256 2.15 3.87 8,000 2.43E-05 0.04 7440 29 1.80 1027 1311 2.73 4.92 9,000 2.74E-05 0.06 Totals: 15.77 28.84 2.04E-04

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 15.8 MWH's: 280.0 28.8 Percentage 11% 10%

ENCLOSURE I (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: Dec-01 I I Revised 5/1,5/01 Cumulative MWH's TOTAL LEU I Start: 57,826.581 I End: I 57,868.84 I 8,170.83 I

  • added HEU=49698.01 Run Ave Pwr Start S/D Operating Todays Stack Ar-41 Released No. Day Level Time Time Time total Monitor Limit = 4E-4 uCVcc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH max CPM uCl/cc Cl/day 7441 4 1.85 1047 1326 2.65 4.90 9,000 2.74E-05 0.05 7442 6 1126 1126 7443 7 1.80 1008 1351 3.72 6.69 11,000 3.34E-05 0.09 7444 11 1.80 1109 1425 3.27 5.88 15,000 4.56E-05 0.11 7445 13 1.80 1042 1201 1.32 2.37 10,000 3.04E-05 0.03 7446 14 1.75 1117 1613 4.93 8.63 15,000 4.56E-05 0.17 7447 18 1.90 1047 1347 3.00 5.70 11,000 3.34E-05 0.07 7448 20 1.85 1209 1551 3.70 6.85 11,000 3.34E-05 0.09 7449 27 2.00 1108 1145 0.62 1.23 9,000 2.74E-05 0.01 Totals: 23.20 42.25 2.77E-04

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 23.21 MWH's: 280.0 42.3 Percentage 17% 15%

ENCLOSURE I (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: Jan-02I I Revised 5/15/01 Cumulative MWH's TOTAL LEU Start: 57,868.841 1 End: 157,913.971 8,215.95

  • added HEU=49698.01 Run Ave Pwr Start S/D Operating Todays Stack Ar-41 Released No. Day Level Time Time Time total Monitor Limit =4E-4 uCVcc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH max CPM uClicc Cl/day 7450 3 1.95 1056 1228 1.53 2.99 9,000 2.74E-05 0.03 7451 8 1.95 1035 1159 1.40 2.73 8,000 2.43E-05 0.03 7452 10 1.95 1055 1247 1.87 3.64 9,000 2.74E-05 0.04 7453 11 0.10 1311 1417 1.10 0.11 1,500 4.56E-06 0.00 7454 15 2.00 1106 1300 1.90 3.80 9,000 2.74E-05 0.04 7455 17 1.95 1159 1500 3.02 5.88 8,000 2.43E-05 0.05 7456 22 1.95 1107 1500 3.88 7.57 10,000 3.04E-05 0.09 7457 24 1.90 1306 1606 3.00 5.70 10,000 3.04E-05 0.07 7458 29 2.00 1128 1444 3.27 6.53 11,000 3.34E-05 0.08 7459 31 2.00 1055 1400 3.08 6.17 11,000 3.34E-05 0.08 Totals: 1 24.05 45.13 1 2.63E-04

SUMMARY

Operating Max. Actual Max. Actual Hours 147.0 24.1 MWH's:l 294.0 1 45.1 Percentage 16% 15%

ENCLOSURE 1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: Feb-02I I Revised 5/15/01 Cumulative MWH's TOTAL LEU Start: 57,913.977 End: 57,943.431 8,245.41

  • added HEU=49698.01 Run Ave Pwr Start SID Operating Todays Stack Ar-41 Released No. Day Level Time Time Time total Monitor Limit = 4E-4 uCVcc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH max CPM uCi/cc CM/day 7460 5 2.00 1006 1050 0.73 1.47 8,000 2.43E-05 0.01 7461 7 1.90 1008 1308 3.00 5.70 9,000 2.74E-05 0.06 7462 12 1.95 1137 1220 0.72 1.40 7,000 2.13E-05 0.01 7463 14 2.00 1038 1338 3.00 6.00 9,000 2.74E-05 0.06 7464 19 2.00 1055 1150 0.92 1.83 8,000 2.43E-05 0.02 7465 21 2.00 1045 1200 1.25 2.50 9,000 2.74E-05 0.03 7466 26 1.25 0935 1530 5.92 7.40 9,000 2.74E-05 0.12 7467 28 2.00 1046 1221 1.58 3.17 9,000 2.74E-05 0.03 Totals: 17.12 29.46 2.07E-04

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 17.1 MWH's:l 280.0 1 29.5 Percentage 12% 11%

ENCLOSURE I (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: Mar-02I I Revised 5/15/01 Cumulative MWH's TOTAL LEU I Start: 57,943.431 1 End: 157,975.271 8,267.85 1

  • added HEU=49698.01 Run Ave Pwr Start S/D Operating Todays Stack Ar-41 Released No. Day Level Time Time Time total Monitor Limit = 4E-4 uCi/cc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH max CPM uCvcc Cl/day 7468 5 2.00 1030 1235 2.08 4.17 9,000 2.74E-05 0.04 7469 7 2.00 1116 1633 5.28 10.57 8,000 2.43E-05 0.10 7470 12 2.00 1049 1238 1.82 3.63 8,000 2.43E-05 0.03 7471 14 2.00 0949 1250 3.02 6.03 8,000 2.43E-05 0.05 7472 19 2.00 1112 1219 1.12 2.23 8,000 2.43E-05 0.02 7473 21 2.00 1107 1200 0.88 1.77 8,000 2.43E-05 0.02 7474 26 2.00 1136 1247 1.18 2.37 7,000 2.13E-05 0.02 7475 28 1.90 0915 0949 0.57 1.08 7,000 2.13E-05 0.01 Totals: 15.95 31.84 1.92E-04

SUMMARY

Operating Max. Actual Max. Actual Hours 154.0 16.0 MWH's:I 308.0 1 31.8 Percentage 10% 10%

ENCLOSURE 1 (Continued) .1 NSC-78 Monthly Information Sheet NSC-78 Month: Apr-02I I Revised 5/15/01 Cumulative MWH's TOTAL LEU r Start: 57,975.27 End: 158,001.92 8,294.50

  • added HEU=49698.01 Run Ave Pwr Start SID Operating Todays Stack Ar-41 Released No. Day Level Time Time Time total Monitor LimIt=4E-4uCl/cc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH max CPM uCi/cc CM/day 7476 2 2.00 0925 1135 2.17 4.33 7,000 2.13E-05 0.03 7477 4 2.00 1132 1212 0.67 1.33 7,000 2.13E-05 0.01 7478 9 1.95 0919 1019 1.00 1.95 7,000 2.13E-05 0.02 7479 11 1.95 1045 1311 2.43 4.75 10,000 3.04E-05 0.06 7480 16 1.85 0918 1112 1.90 3.52 10,000 3.04E-05 0.04 7481 18 7482 23 1.90 0905 1200 2.92 5.54 10,000 3.04E-05 0.07 7483 25 2.00 1048 1147 0.98 1.97 9,000 2.74E-05 0.02 7484 30 2.00 1141 1319 1.63 3.27 7,000 2.13E-05 0.03 1 1. & 4. 4 4. 4. .9 4.

4 4. 9 4. 4 4 4. 9 I 4- 1 4. 4 + 4. 1 4.

I 4 I 4. 4. 4. t I t

____ I J. I 4. .9 4. 4. 4 1 4 4 4. .9 4. 1 1 7

+ I 4. 1 4. t I

1. S 4 .4. 1 4 4. 4 4.

Totals: 13.70 26.65 2.04E-04

SUMMARY

Operating Max. Actual Max. Actual Hours 147.0 13.7 MWH's: 294.0 26.7 Percentage 9% 9%

ENCLOSURE 1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: May-02 I I Revised 5/8/02 Cumulative MWH's TOTAL LEU I Start: 58,001 .921I I End: I 58,035.201 8,327.78 I I *ddpd i-iEiJ=4g98O1 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 Limit= 1.0E-03uCl/cc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH max CPM uCi/cc  % of Limit 7485 1 2.00 1052 1208 1.27 2.53 8,000 3.50E-05 3.50 7486 7 1.90 0857 1119 2.37 4.50 8,000 3.50E-05 3.50 7487 8 0.10 0926 1010 0.73 0.07 700 3.06E-06 0.31 7488 9 2.00 1120 1359 2.65 5.30 8,000 3.50E-05 3.50 7489 14 2.00 0909 1035 1.43 2.87 7,000 3.06E-05 3.06 7490 16 2.00 1111 1132 0.35 0.70 7,000 3.06E-05 3.06 7491 21 2.00 1051 1428 3.62 7.23 10,000 4.38E-05 4.38 7492 22 0.10 1444 1510 0.43 0.04 2,500 1.09E-05 1.09 7493 23 2.00 0959 1205 2.10 4.20 9,000 3.94E-05 3.94 7494 28 2.00 0902 1010 1.13 2.27 8,000 3.50E-05 3.50 7495 30 2.00 1013 1200 1.78 3.57 8,500 3.72E-05 3.72 Totals: 17.87 33.28 1 3.36E-04

SUMMARY

Operating Max. Actual Max. Actual Hours 161.0 17.9 MWH's: 322.0 33.3 Percentage 11% 10%

ENCLOSURE I (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: Jun-02 Revised 5/8/02 Cumulative MWH's TOTAL LEU I trt 5O52fl I I End: 158.065.671 8.358.25 I

-". . . I i .. . . .* . .. l7I

  • 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 Limit = 1.0E-03 uCilcc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH max CPM uCi/cc  % of Limit 7496 4 2.00 0904 1116 2.20 4.40 9,000 3.94E-05 3.94 7497 6 2.00 1039 1151 1.20 2.40 7,000 3.06E-05 3.06 7498 11 2.00 1050 1114 0.40 0.80 8,000 3.50E-05 3.50 7499 13 2.00 1042 1155 1.22 2.43 8,000 3.50E-05 3.50 7500 18 2.00 1040 1406 3.43 6.87 9,000 3.94E-05 3.94 7501 20 2.00 1022 1243 2.35 4.70 9,000 3.94E-05 3.94 7502 25 2.00 0909 1150 2.68 5.37 8,000 3.50E-05 3.50 7503 27 2.00 1046 1231 1.75 3.50 6,000 2.63E-05 2.63 Totals: 15.23 30.47 1 2.80E-04

SUMMARY

Operating Max. Actual max. Actual Hours 147.0 15.2 MWH's: 294.0 30.5 Percentage 10% 10%

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 2001-2002 reporting period. This information is required by Technical Specification 6.8.4.b.

DATE RUN# LOGBOOK/PAGE CAUSE 8/27/01 7412 50 / 17 Reactor scram caused by short period on the Log N channel due to noise.

8/30/01 7414 50 / 21 Reactor scram caused by short period on the Log N channel due to noise.

9/11/01 7417 50/24 Reactor scram caused by short period on the Log N channel due to noise.

9/13/01 7418 50/25 Reactor scram caused by short period on the Log N channel due to noise.

10/2/01 7423 50/31 Reactor scram caused by short period on the Log N channel due to noise.

10/9/01 7425 50/33 Reactor scram caused by short period on the Log N channel due to noise.

10/111/01 7426 50/35 Reactor scram caused by short period on the Log N channel due to noise.

10/16/01 7427 50/36 Reactor scram caused by short period on the Log N channel due to noise.

10/18/01 7428 50/37 Reactor scram caused by short period on the Log N channel due to noise.

11/13/01 7436 50/47 Reactor scram caused by short period on the Log N channel due to noise.

12/6/01 7442 50/58 Reactor scram caused by short period on the Log N channel due to noise.

12/6/01 7442 50/58 Reactor scram caused by spike on the Wide Range Monitor #2 channel due to loss of detector ground.

12/11/01 7444 50/60 Reactor scram caused by short period on the Log N channel due to noise.

12/20/01 7448 50 / 65 Reactor scram caused by short period on the Log N channel due to noise.

12/27/01 7449 50 / 67 Reactor scram caused by short period on the Log N channel due to noise.

1/3/02 7450 50/68 Reactor scram caused by short period on the Log N channel due to noise.

1/10/02 7452 50/71 Reactor scram caused by short period on the Log N channel due to noise.

1/15/02 7454 50/74 Reactor scram caused by short period on the Log N channel due to noise.

1/17/02 7455 50/76 Reactor scram caused by short period on the Log N channel due to noise.

1/22/02 7456 50/78 Reactor scram caused by short period on the Log N channel due to noise.

1/24/02 7457 50/81 Reactor scram caused by short period on the Log N channel due to noise.

1/29/02 7458 50/83 Reactor scram caused by short period on the Log N channel due to noise.

2/5/02 7460 50/86 Reactor scram caused by short period on the Log N channel due to noise.

3/14/02 7471 50/100 Reactor scram caused by short period on the Log N channel due to noise.

ENCLOSURE2 EMERGENCY SHUTDOWNS AND SCRAMS 3/19.02 7472 50/102 Reactor scram caused by short period on the Log N channel due to noise.

3126/02 7474 50/ 104 Reactor scram caused by short period on the Log N channel due to noise.

4/30/02 7484 50/115 Reactor scram caused by short period on the Log N channel due to noise.

5/2/02 7485 50/117 Reactor scram caused by short period on the Log N channel due to noise.

5/9/02 7488 50/121 Reactor scram caused by short period on the Log N channel due to noise.

5/16/02 7490 50/124 Reactor scram caused by short period on the Log N channel due to noise.

5/21/02 7491 50 / 125 Reactor scram caused by short period on the Log N channel due to noise.

5/23/02 7493 50/127 Reactor scram caused by short period on the Log N channel due to noise.

6/6/02 7497 50/133 Reactor scram caused by short period on the Log N 7 7__ 1channel due to noise.

All but one of the emergency shutdowns and scrams were due to noise on the Log N Period Channel. New instrumentation for this channel was installed, but the problem has continued. The connection between the detector and the instrumentation has been a makeshift connection because the connectors do not match.

We are hopeful that once we get the proper matching connectors installed, the problem will be solved. The only scram that occurred that was not due to noise on the Log N Period channel was due to a spike on the Wide Range Monitor #2 channel. This was due to noise caused by the breakdown of the insulation between the detector and the shroud that it is in. The insulation has been replaced, and the channel is working properly.

ENCLOSURE 3 The following is a listing of the major maintenance operations performed in the 2001-2002 reporting period which includes impact upon the safe operation of the reactor and the reasons for corrective maintenance.

This information is required by Technical Specification 6.8.4.c.

1. Secondary System Cooling Tower Plumbing During the 2000-2001 reporting period, the secondary system cooling towers were relocated. The plumbing for this project was completed this year. Both cooling loops have been tested, and have been found to be working well.

ENCLOSURE 4 FACILITY CHANGES - 10CFR50.59 REVIEW The following is a listing and description of 10CFR50.59 evaluations conducted during the 2001-2002 reporting period. This information is required by Technical Specification 6 8.4.d.

1. Instrumentation Upgrade With funds from the Reactor Instrumentation Grant Program, RINSC purchased and received a new Gamma Metrics Neutron Flux Monitor to replace the Log N Power, Log N Period, and Start-Up channels. Pursuant to 10CFR50.59, a committee was formed to evaluate this change, and it found that the upgrade did not involve a change in the Technical specifications, nor did it create an unreviewed safety question.

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 three 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.

3wD QTR 2001 4"" QTR 2001 1l5 QTR 2002 2 t"' QTR 2002z LOCATION Northeast Wall 49 33 29 32 Demineralizer 68 80 68 69 Door Heat Exchanger 5 6 4 13 Door I I I 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 1.43 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 2.85 mrem. Likewise the dose received at the Heat Exchanger Door would be 0.28 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 1 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 1 mrem.

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