ML062420069

Letter Forwarding Annual Report Required by Rinsc Technical Specifications (Section 6.8.4)

ML062420069
Person / Time
Site:	Rhode Island Atomic Energy Commission
Issue date:	08/18/2006
From:	Marlone Davis State of RI, Atomic Energy Comm, Nuclear Science Ctr
To:	Hughes D Office of Nuclear Reactor Regulation
References
Download: ML062420069 (19)

Text

STATE OF RHODE ISLANI) AND PROVIDENCE PLANTATIONS Y1 Rhode Island Atomic Energy Commission NUCLEAR SCIENCE CENTER 16 Reactor Road Narragansett, R.I. 02882-1165 August 18, 2006 Docket No. 50-193 Mr. Daniel Hughes, Project Manager Non-Power Reactors, Decommissioning and Environmental Project Directorate Division of Reactor Projects - I1I/IVN U. S. Nuclear Regulatory Commission (NRC)

Washington, D. C. 20555

Dear Mr. Hughes:

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. Stephen Mecca, Chairman RJAEC Dr. Alfred L. Allen, RIAEC Dr. Peter Gromet, RIAEC Dr. Andrew Kadak, RIAEC Dr. Bahrain Nassersharif RIAEC

ENCLOSURE 1 Technical Specifications Section 6.8.4.a Reactor Energy Energy Critical Generated Generated Month (hours) (MWh) (MWd)

July-05 14.28 28.57 1.19 August-05 30.82 37.20 1.55 September-05 23.77 47.44 1.98 October-05 69.98 139.97 5.83 November-05 21.85 43.70 1.82 December-05 36.67 71.A3 2.98 January-06 17.08 30.56 1.27 February-06 28.72 50.82 2.12 March-06 20.75 34.12 1.42 April-06 20.95 41.90 1.75 May-06 19.45 38.90 1.62 June-06 25.83 51.67 2.15 2005-06 Totals: 330.15 616.28 25.68 I I Total Energy Output Since Initial Criticality: 6064.1 2.526.92

ENCLOSURE1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 JMonth: Jul-2005 I Revised 3/22/20041 Cumulative MWH's TOTAL LEU I Start: 60.006.741 F I End: 160,035.311 10,327.89I

• added HEU = 49698.01 Run Ave Pwr System Start SID Operating Todays Stack Ar.41 Released No. Day Level On Time Time Time Time total Monitor Limit - 4E.4 uCiIcc (1-31) (MW) (hhmm) (hhmm) (hhmm) (hrs) MWH max CPM uCi/cc Cilday 7883 1 2.00 1034 1153 1215 0.37 0.73 5,000 2.25E-05 0.10 7884 7 2.00 0900 0935 1055 1.33 2.67 10,000 4.49E-05 0.37 7885 12 2.00 0948 0948 1057 1.15 2.30 9,000 4.04E-05 0.32 7886 14 2.00 0840 1019 1400 3.68 7.37 10,500 4.71E-05 1.03 7887 19 2.00 0840 0946 1105 1.32 2.63 10,500 4.71 E-05 0.37 7888 21 2.00 0840 0951 1148 1.95 3.90 10,500 4.71 E-05 0.55 7889 25 2.00 0850 0957 1126 1.48 2.97 10,000 4.49E-05 0.42 7890 26 2.00 0838 1034 1334 3.00 6.00 10,000 4.49E-05 0.84 Totals: 14.28 28.57 4.00

SUMMARY

Operating Max. Actual Max. Actual Hours 154.0 14.3 MWH's: 308.0 28.6 Percentage 9% 9%

Stack Releases 4.0 curies

ENCLOSUREI (Continued)

NSC-78 Monthly Information Sheet NSC-78 Mo~nth: AUg'20051 ReIsvd 3/22/20041 Cumulative MWH's TOTAL TOTAL LEU LEU I Start: 60,035.311 I End: 160,095.611 10.388.19 1

• added HEU = 49698.01 Run Ave Pwr System Start SID Operating Todays Stack Ar-41 Released No. Day Level On Time Time Time Time total Monitor Limit a 4E-4 uC[Icc (1-31) (MW) (hhmm) (hhmm) (hhmm) (hrs) MWH max CPM uCUcc Cilday 7891 1 2.00 1145 1256 1556 3.00 6.00 7,000 3.14E-05 0.84 7892 2 2.00 0840 1033 1333 3.00 6.00 7,000 3.14E-05 0.84 7893 4 2.00 0835 0930 1503 5.55 11.10 6,000 2.69E-05 1.55 4 2.00 1503 1526 1656 1.50 3.00 6,000 2.69E-05 0.42 7894 5 2.00 1025 1025 1203 1.63 3.27 450 2.02E-06 0.46 7895 10 1450 1634 1635 0.02 300 1.35E-06 7896 11 2.00 0910 1024 1350 3.43 6.87 5,000 2.25E-05 0.96 7897 12 1025 1025 1525 5.00 300 1.35E-06 7898 15 1402 1402 1615 2.22 300 1.35E-06 7899 16 2.00 0840 0935 1235 3.00 6.00 9,000 4.04E-05 0.84 7900 17 1316 1316 1553 2.62 1,000 4.49E-06 7901 18 2.00 0830 1025 1418 3.88 7.77 8,000 3.59E-05 1.09 7902 19 1413 1413 1608 1.92 450 2.02E-06 7903 22 1015 1127 1154 0.45 300 1.35E-06 7904 23 2.00 0840 0945 1245 3.00 6.00 4,500 2.02E-05 0.84 7905 25 2.00 0715 0740 0949 2.15 4.30 6,000 2.69E-05 0.60 Totals: 30.82 37.20 5.21

SUMMARY

Operating Max. Actual Max. Actual Hours 147.0 30.8 MWH's: 294.0 37.2 Percentage 21% 13%

Stack Releases

ENCLOSURE 1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 IMonth: Sep-20051 I Revised 3/22/20041 Cumulative MWH's TOTAL LEU I Start: 60.095.61 I I End: 160,143.041 10,435.62 I

• added HEU = 49698.01 Run Ave Pwr System Start SID Operating Todays Stack Ar-41 Released No. Day Level On Time Time Time Time total Monitor Limit - 4E-4 uC[lcc (1-31) (MW) (hhmm) (hhmm) (hhmm) (hrs) UWiH max CPM uCilcc Cl/day 7906 1 2.00 0840 1010 1310 3.00 6.00 3,000 2.42E-05 0.84 7907 6 2.00 0840 0930 1202 2.53 5.07 5,500 4.44E-05 0.71 7908 8 2.00 0840 0940 1100 1.33 2.67 5,500 4.44E-05 0.37 7909 9 0.10 0840 1000 1003 0.05 0.01 700 5.65E-06 0.00 7910 15 2.00 0810 0915 1242 3.45 6.90 6,000 4.84E-05 0.97 7911 20 2.00 0830 0918 0940 0.37 0.73 5,000 4.04E-05 0.10 7912 21 2.00 0820 0910 1529 6.32 12.63 6,000 4.84E-05 1.77 7913 22 2.00 0835 0943 1025 0.70 1.40 5,000 4.04E-05 0.20 7914 27 2.00 0825 0930 1302 3.53 7.07 4,500 3.63E-05 0.99 7915 29 2.00 0830 0926 1155 2.48 4.97 5,000 4.04E-05 0.70 Totals: 23.77 47.44 1 6.64

SUMMARY

Operating Max. Actual Max. Actual Hours 147.0 23.8 MWH's: 294.0 47.4 Percentage 16% 16%

ENCLOSURE I (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: Oct-2005 IR 3/22/2004 Cumulative MWH's TOTAL LEU I Start: 60,143.041 I End: 160,283.011 10,575.59 I

• added HEU = 49698.01 Run Ave Pwr System Start SID Operating Todays Stack Ar-41 Released No. Day Level On Time Time Time Time total Monitor Umit,a4E-4 uCIIcc (1-31) (MW) (hhmm) (hhmm) (hhmm) (hrs) MWH max CPM uCl/cc ClIday 7916 3 2.00 0900 0953 1659 7.10 14.20 5,500 4.44E-05 1.99 7917 4 2.00 0823 0948 1032 0.73 1.47 3,000 2.42E-05 0.21 7918 5 2.00 0825 0921 1621 7.00 14.00 5,000 4.04E-05 1.96 7919 6 2.00 0825 0938 1045 1.12 2.23 4,500 3.63E-05 0.31 7920 7 2.00 0823 0920 1623 7.05 14.10 3,200 2.58E-05 1.97 7921 11 2.00 0825 0935 1126 1.85 3.70 3,200 2.58E-05 0.52 7922 12 2.00 0830 0918 1633 7.25 14.50 4,000 3.23E-05 2.03 7923 13 2.00 0850 1004 1028 0.40 0.80 4,000 3.23E-05 0.11 7924 14 2.00 0835 1002 1626 6.40 12.80 4,000 3.23E-05 1.79 7925 17 2.00 0825 0918 1628 7.17 14.33 6,000 4.84E-05 2.01 7926 18 2.00 0825 0949 1411 4.37 8.73 5,000 4.04E-05 1.22 7927 19 2.00 0755 1039 1643 6.07 12.13 6,000 4.84E-05 1.70 7928 20 2.00 0830 0924 1633 7.15 14.30 4,500 3.63E-05 2.00 7929 24 2.00 0830 0915 1249 3.57 7.13 4,000 3.23E-05 1.00 7930 25 2.00 0835 0925 1025 1.00 2.00 4,000 3.23E-05 0.28 7931 27 2.00 0935 1039 1225 1.77 3.53 5,000 4.04E-05 0.49 Totals: 69.98 139.97 1 1 19.60

SUMMARY

Operating Max. Actual Max. Actual Hours 154.0 70.0 MWH's: 308.0 140.0 Percentage 45% 45%

Stack Releases

ENCLOSURE 1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 IMonth: NOV-20051 Revised 3/22/2004 Cumulative MWH's TOTAL LEU 1 Start: 60,283.011I Start: I End: 160,326.711 10,619.29

• added HEU = 49698.01 Run Ave Pwr System Start SID Operating Todays Stack Ar-41 Released No. Day Level On Time Time Time Time total Monitor Umit = 4E-4 uCilcc (1-31) (MW) (hhmm) (hhmm) (hhmm) (hrs) MWH max CPM uCilcc ClIday 7932 1 2.00 0825 0922 1141 2.32 4.63 4,000 3.23E-05 0.65 7933 3 2.00 0840 0950 1100 1.17 2.33 5,000 4.04E-05 0.33 7934 4 2.00 0948 1159 1241 0.70 1.40 4,000 3.23E-05 0.20 7935 7 2.00 1350 1453 1502 0.15 0.30 2,000 1.61 E-05 0.04 7936 8 2.00 0825 0918 1142 2.40 4.80 5,000 4.04E-05 0.67 7937 10 2.00 0828 0935 1235 3.00 6.00 5,000 4.04E-05 0.84 7938 15 2.00 0835 0935 1644 7.15 14.30 6,000 4.84E-05 2.00 7939 17 2.00 0805 0854 1142 2.80 5.60 6,000 4.84E-05 0.78 7940 22 2.00 0830 0922 1132 2.17 4.33 6,000 4.84E-05 0.61 Totals: 21.85 43.70 6.12

SUMMARY

Operating Max. Actual Max. Actual Hours 133.0 21.9 MWH's: 266.0 43.7 Percentage 16% 16%

Stack Releases 6.1 curies

ENCLOSURE 1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 IMonth: Dec-20051 IRevised 3/22/2004 Cumulative MWH's TOTAL LEU Start: 60,326.711 1End: 160,398.14110,690.72

• added HEU = 49698.01 Run Ave Pwr System Start SID Operating Todays Stack Ar-41 Released No. Day Level On Time Time Time Time total Monitor Limit 4E-4 uCIlcc (1-31) (MW) (hhmm) (hhmm) (hhmm) (hrs) MWH max CPM uCilcc Cilday 7942 7 2.00 0850 0916 1616 7.00 14.00 5,000 4.04E-05 1.96 7943 9 2.00 0835 0925 1425 5.00 10.00 4,000 3.23E-05 1.40 7943 9 2.00 1425 1503 1703 2.00 4.00 4,000 3.23E-05 0.56 7944 13 2.00 0825 0910 1030 1.33 2.67 5,000 4.04E-05 0.37 7945 14 2.00 0820 0905 1605 7.00 14.00 6,000 4.84E-05 1.96 7946 15 2.00 0825 0917 1237 3.33 6.67 5,500 4.44E-05 0.93 7947 21 2.00 0830 0912 1612 7.00 14.00 5,000 4.04E-05 1.96 7948 23 0.10 0915 1010 1110 1.00 0.10 300 2.42E-06 0.01 7949 28 2.00 0830 0920 1220 3.00 6.00 4,000 3.23E-05 0.84 Totals: 29 0.10 925.00 0938 1048 36.67 71.43 200.00 1.61E-06 10.00

SUMMARY

Operating Max. Actual Max. Actual Hours 154.0 36.7 MWH's: 308.0 71.4 Percentage 24% 23%

Stack Releases 10.0 curies

ENCLOSURE 1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: Jan-06 I I Rvised 3/22/2004 Cumulative MWH's TOTAL LEU I Start: 60,398.141 I End: 160,428.701 10,730.691

• added HEU =49698.01 Run Ave Pwr System Start SID Operating Todays Stack Ar-41 Released No. Day Level On Time Time Time Time total Monitor Limit = 4E-4 uCilcc (1-31) (MW) (hhmm) (hhmm) (hhmm) (hrs) MWH max CPM uCilcc Cilday 7951 3 0.10 1015 1052 1119 0.45 0.05 300 9.12E-07 0.01 7952 3 0.10 1345 1422 1435 0.22 0.02 200 6.08E-07 0.00 7953 4 2.00 0825 0955 1255 3.00 6.00 5,000 1.52E-05 0.84 7954 10 2.00 0835 0930 1230 3.00 6.00 3,800 1.16E-05 0.84 7955 12 2.00 0825 0910 1210 3.00 6.00 3,500 1.06E-05 0.84 7956 19 2.00 0908 1035 1204 1.48 2.97 4,000 1.22E-05 0.42 7957 23 0.10 0945 1040 1154 1.23 0.12 300 9.12E-07 0.02 7978 24 2.00 0830 0920 1140 2.33 4.67 4,000 1.22E-05 0.65 7979 26 2.00 0830 0920 1110 1.83 3.67 4,000 1.22E-05 0.51 7980 31 2.00 0830 0913 0945 0.53 1.07 4,000 1.22E-05 0.15 Totals: 17.08 30.56 4.28

SUMMARY

Operating Max. Actual Max. Actual Hours 147.0 17.1 MWH's: 294.0 30.6 Percentage 12% 10%

Stack Releases 4.3 curies

ENCLOSURE I (Continued)

NSC-78 Monthly Information Sheet NSC-78 I Month: Feb-06 I I Revised 3/22/20041 Cumulative MWH's TOTAL LEU I Start: 60,428.701 I End: 160,479.51110,781.-501

• added HEU = 49698.01 Run Ave Pwr System Start S/D Operating Todays Stack Art41 Released No. Day Level On Time Time Time Time total Monitor Limit - 4E-4 uClIcc (1-31) (MW) (hhmm) (hhmm) (hhmm) (hrs) MWH max CPM uClIcc Cilday 7961 1 2.00 0900 0945 1010 0.42 0.83 4,000 1.22E-05 0.12 7962 2 2.00 0900 1019 1230 2.18 4.37 4,000 1.22E-05 0.61 7963 7 2.00 0840 0936 1148 2.20 4.40 4,000 1.22E-05 0.62 7964 7 0.10 1422 1513 1728 2.25 0.23 300 9.12E-07 0.03 7965 8 0.10 0840 0953 1107 1.23 0.12 300 9.12E-07 0.02 7966 9 2.00 0830 0920 1033 1.22 2.43 4,000 1.22E-05 0.34 7967 10 2.00 0830 0940 1640 7.00 14.00 4,000 1.22E-05 1.96 7968 16 2.00 0835 0920 1233 3.22 6.43 4,000 1.22E-05 0.90 7969 21 2.00 0830 0940 1240 3.00 6.00 3,500 1.06E-05 0.84 7970 23 2.00 0840 0937 1237 3.00 6.00 3,500 1.06E-05 0.84 7971 28 2.00 0830 0932 1232 3.00 6.00 3,500 1.06E-05 0.84 Totals: 28.72 50.82 7.11

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 28.7 MWH's: 280.0 50.8 Percentage 21% 18%

Stack Releases 7.1 curies

ENCLOSURE 1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 IMonth: Mar-06I I Revsed 3/22/2004 Cumulative MWH's TOTAL LEU Start: 60,479.511 1 End: 160,513.63110,806.21

• added HEU =49698.01 Calibration Factor = 0.000449 Run Ave Pwr System Start SID operating Todays Stack Ar-41 Released No. Day Level On Time Time Time Time total Monitor Limit = 4E-4 uCl/cc (1-31) (MW) (hhmm) (hhmm) (hhmm) (hrs) MWH max CPM uCilcc Cl/day 7972 2 2.00 0810 0940 1203 2.38 4.77 4,000 1.22E-05 0.21 7973 6 0.20 0830 0923 0929 0.10 0.02 200 6.08E-07 0.0004 7974 9 2.00 0837 0938 1357 4.32 8.63 4,000 1.22E-05 0.3779 7975 14 2.00 0830 0913 1003 0.83 1.67 4,000 1.22E-05 0.0730 7976 16 2.00 0830 0926 1226 3.00 6.00 5,000 1.52E-05 0.3283 7977 21 1.20 0830 0945 1245 3.00 3.60 3,000 9.12E-06 0.1970 7978 23 1.20 0830 0958 1258 3.00 3.60 3,000 9.12E-06 0.1970 7979 28 1.20 0830 1032 1332 3.00 3.60 3,000 9.12E-06 0.1970 7980 30 2.00 0830 0922 1025 1.05 2.10 5,000 1.52E-05 0.1149 7981 30 2.00 1045 1152 1156 0.07 0.13 4,000 1.22E-05 0.0058 Totals: 20.75 34.12 1 1.70

SUMMARY

Operating Max. Actual Max. Actual Hours 147.0 20.8 MWH's: 294.0 34.1 Percentage 14% 12%

Stack Releases 1.7 curies

ENCLOSURE 1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: Apr-05 I I Resed 3/22/2004 Cumulative MWH's TOTAL LEU I Start: 60,513.631 I End: 160,555.53110,848.111

• _a_*added HEU = 49698.01 Run Ave Pwr System Start SID Operating Todays Stack Ar-41 Released No. Day Level On Time Time Time Time total Monitor Limit - 4E-4 uCI/cc (1-31) (MW) (hhmm) (hhmm) (hhmm) (hrs) MWH max CPM uCl/cc Cl/day 7982 3 2.00 0820 0913 0941 0.47 0.93 4,000 1.22E-05 0.04 7983 4 2.00 0830 0918 1142 2.40 4.80 6,000 1.82E-05 0.32 7984 6 2.00 0830 0920 1002 0.70 1.40 6,000 1.82E-05 0.09 7985 13 2.00 0835 0928 1228 3.00 6.00 6,000 1.82E-05 0.39 7986 18 2.00 0830 0925 1225 3.00 6.00 6,000 1.82E-05 0.39 7987 20 2.00 0830 0930 1230 3.00 6.00 5,500 1.67E-05 0.36 7988 25 2.00 0835 0945 1245 3.00 6.00 5,000 1.52E-05 0.33 7989 26 2.00 1130 1230 1410 1.67 3.33 6,000 1.82E-05 0.22 7990 27 2.00 0840 0942 1325 3.72 7.43 5,000 1.52E-05 0.41 Totals: /_20.95 41.90 _E_1_1_2.55

SUMMARY

Operating Max. Actual Max. Actual Hours 154.0 21.0 MWH's: 308.0 41.9 Percentage 14% 14%

Stack Releases 2.6 curies

ENCLOSURE I (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: May-05I I Revised 3/22/2004 Cumulative MWH's TOTAL LEU I Start: 60.555.531 I End: 160.594.431 10.887.011I I added HEU =149698.01 Run Ave Pwr System Start SID Operating Todays Stack Ar.41 Released No. Day Level On Time Time Time Time total Monitor Limit -4E.4 uCilco (1.31) (MW) (hhmm) (hhmm) (hhmm) (hrs) MWH maxCPM uClice ClIday 7991 4 2.00 0835 0948 1248 3.00 6.00 5,000 2.25E-05 0.84 7992 9 2.00 0840 0938 1238 3.00 6.00 4,000 1.80E-05 0.84 7993 11 2.00 0830 0919 0958 0.65 1.30 4,000 1.80E-05 0.18 7994 18 2.00 0830 0850 1000 1.17 2.33 4,000 1.80E-05 0.33 7995 23 2.00 0830 0930 1712 7.70 15.40 4,000 1.80E-05 2.16 7996 25 2.00 0835 0924 1040 1.27 2.53 5,000 2.25E-05 0.35 7997 26 2.00 0915 0930 1100 1.50 3.00 5,000 2.25E-05 0.42 7998 30 2.00 0830 0920 1030 1.17 2.33 5,000 2.25E-05 0.33 Totals: I_ I_1_1 19.45 38.90 1 5.45

SUMMARY

Operating Max. Actual Max. Actual Hours 147.0 19.5 MWH's: 294.0 38.9 Percentage 13% 13%

Stack Releases 5.4 curies

ENCLOSURE 1 (Continued)

NSC-78 Monthly Information Sheet NSC-78 Month: Jun-2006 Revised 3/22/2004 Cumulative MWH's TOTAL LEU Start: 60,594.431 1 End: 160,646.10110,938.681

• added HEU = 49698.01 Run Ave Pwr System Start SID operating Todays Stack Ar-41 Released No. Day Level On Time Time Time Time total Monitor Umt - 4E4 uCilcc

__ (1-31) (MW) (hhmm) (hhmm) (hhmm) (hrs) MWH max CPM uCi/cc ClIday 7999 1 1 2.00 0830 0933 1015 0.70 1.40 5,000 2.25E-05 0.20 8000 6 2.00 0906 1022 1322 3.00 6.00 6,000 2.69E-05 0.84 8001 8 2.00 0822 0910 1034 1.40 2.80 5,000 2.25E-05 0.39 8002 13 2.00 0830 0920 1125 2.08 4.17 5,000 2.25E-05 0.58 8003 15 2.00 0845 1114 1414 3.00 6.00 3,000 1.35E-05 0.84 8004 20 2.00 0835 0930 1230 3.00 6.00 10,000 4.49E-05 0.84 8005 22 2.00 0830 0930 1230 3.00 6.00 10,000 4.49E-05 0.84 8006 27 2.00 0830 0930 1230 3.00 6.00 6,000 2.69E-05 0.84 8007 29 2.00 0830 0920 1259 3.65 7.30 4,000 1.80E-05 1.02 8008 30 2.00 1000 1120 1420 3.00 6.00 5,000 2.25E-05 0.84 Totals: I I 25.83 51.67 1 1 7.23

SUMMARY

Operating Max. Actual Max. Actual Hours 147.0 25.8 MWH's: 294.0 51.7 Percentage 18% 18%

Stack Releases 7.2 curles

ENCLOSURE 2 EMERGENCY SHUTDOWNS AND SCRAMS The following is a listing of the emergency shutdowns and inadvertent scrams that occurred during the 2005-2006 reporting period. This information is required by Technical Specification 6.8.4.b.

DATE RUN # LOGBOOK / PAGE CAUSE 7/26/05 7890 53 /94 High N Flux Scram due to incore location. Also dropped Blade #2.

8/1/05 7891 53 /95 Dropped Blade #3 due to magnet misalignment.

8/2/05 7892 53 /96 High N Flux Scram due to incore location.

8/11/05 7896 53 / 101 Dropped Blade #1 due to magnet misalignment.

8/16/05 7899 53 / 105 Reactor scram when Wide Range Monitor #1 ranged down during start-up.

8/18/05 7901 53 / 107 High N Flux Scram due to incore location.

8/19/05 7902 53 / 109 Dropped Blade #2 due to magnet misalignment.

9/1/05 7906 53 / 113 Dropped Blade #3 due to magnet misalignment.

9/22/05 7913 53 / 120 Dropped Blade #3 due to magnet misalignment.

9/27/05 7914 53 / 121 Dropped Blade #2 due to magnet misalignment.

10/3/05 7916 53 / 123 Reactor scram while manipulating the data acquisition system instrumentation wires.

10/7/05 7920 53 / 127 High Temperature scram while manipulating the SHigh Temperature instrumentation wires.

10/12/05 7922 53 / 129 Dropped Blade #2 due to magnet misalignment.

10/14/05 7924 53 / 131 Dropped Blade #3 due to magnet misalignment.

10/18/05 7926 53 / 133 Dropped Blade #2 due to magnet misalignment.

10/19/05 7927 53 / 134 Dropped Blade #3 due to magnet misalignment.

12/9/05 7943 54/2 Dropped Blades #3 and #4 due to building electrical supply fluctuation.

1/23/06 7957 54/13 Reactor scram when Wide Range Monitor #1 ranged down during start-up.

4/3/06 7982 54/40 Dropped Blade #3 due to magnet misalignment.

6/6/06 8000 54/59 Dropped Blade #3 due to magnet misalignment.

6/15/06 8003 54 /63 High N Flux Scram due to incore location.

ENCLOSURE 2 EMERGENCY SHUTDOWNS AND SCRAMS Most of the unplanned shutdowns occurred because a shim safety blade magnet failed to hold on to the associated blade. There are two factors that contribute to this problem. First, the alignment between the magnet and the armature must be manually set prior to engaging magnet current. If this alignment is not set well, then the armature will rub against the magnet shroud when the blade is withdrawn. This can cause the armature to get knocked loose from the magnet as the blade is being withdrawn. The second contributing factor is that sometimes the magnet current wires get caught in between the armature and the shroud as the magnet is raised and the wires slacken. This can also cause the armature to get pushed off of the magnet. In response to the problem, the magnet current wires have been tied off so that they will not fall into the shroud when the tension slackens. The result has been that since 10/18/05 the only blade that has been dropped is Blade #3, which has the worst alignment of the four shim safeties.

ENCLOSURE 3 The following is a listing of the major maintenance operations performed in the 2005-2006 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.

There were no major maintenance operations which impact the safe operation of the reactor in the 2005-2006 reporting period.

ENCLOSURE4 FACILITY CHANGES - 10CFR50.59 REVIEW The following is a listing and description of 10CFR50.59 evaluations conducted during the 2005-2006 reporting period. This information is required by Technical Specification 6.8.4.d.

1. Repair of the Reactor Control Annunciator Panel Pursuant to 10CFR50.59, a committee was formed to evaluate the repair of the Reactor Control Annunciator Panel. A power surge caused damage to the panel. After repair, all alarms, scrams, and interlocks were verified to be functioning.

2. Neutron Flux Monitor Non-Operate Indicator Light Pursuant to 10CFR50.59, a committee was formed to evaluate the fact that the Non-Operate indicator light on one of the Neutron Flux Monitors is illuminated under operating conditions. It is designed to illuminate when HV is greater than 905V or less than 660V, or when the + I5V or -I5V supply is degraded. The Low HV Trip set point is set so that it will trip when HV drops to 830V. The HIV,

+ I5V, and -15V supplies were verified to be within the expected ranges. All scrams and interlocks associated with the instrument were verified to be functioning properly. The control console annunciator alarm that is associated with this trip functions properly. Consequently, the committee determined that operation could continue despite the indication.

ENCLOSURE 5 RADIOLOGICAL CONTROLS

1. Environmental Surveys Outside the Facility - Technical Specification 6.8.4.e Quarterly OSL1 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.

LOCATION 3"' QTR 2005 4T1 QTR 2005 Is QTR 2006 2ND QTR 2006" Northeast Wall 1 23 23 1 Demineralizer 130 272 97 84 Door Heat Exchanger 15 39 22 1 Door 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 0.48 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 5.83 mrem. Likewise the dose received at the Heat Exchanger Door would be 0.77 mrem. The variations from quarter to quarter and from previous reports were due in part to movements of items necessitated by painting and floor repair projects completed during the fiscal year.

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.