ML20211G937

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Ri Nuclear Science Center Annual Rept for Period 980701 Through 990630,providing Reactor Operating Statistics,Info Re Inadvertent Reactor Shutdowns or Scrams,Maint Operations Performed & Changes in Facility
ML20211G937
Person / Time
Site: Rhode Island Atomic Energy Commission
Issue date: 08/16/1999
From: Tehan T
RHODE ISLAND, STATE OF
To: Mendonca M
NRC (Affiliation Not Assigned)
References
NUDOCS 9909010063
Download: ML20211G937 (19)
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  • r Al! 0F Ri10Dr ISI.AND AND PROVIDENCE Pl.ANTAllONS Rhode Island Atomic Energy Commission NUCLEAR SCIENCE CENTER 16 Reactor Road Narragansett, R.I. 02882 1165 August 16,1999 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.

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TT:j Enclosures (5) M b' Copy to : \ g Craig Bassett, Region I 11arry Knickle, Chairman NRSC I Vincent Rose, Chairman RIAEC -

9909010063 990816 PDR ADOCK 05000193 .

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ENCLOSUREI Technical Specifications Section 6.8.4.a (98-99)

Reactor - Energy Energy Critical Generated Generated Month - (hours) (MWh) (mwd)

July-98 1.80 0.20 0.01 August-98 12.50 21.90 0.91 September-98 29.40 51.80 2.16 October-98 69.90 121.10 5.05 November-98 63.80 109.60 4.57 December-98 19.50 32.80 1.37 January-99 6.20 10.60 0.44 February-99 12.70 22.60 0.94 March-99 29.00 51.00 2.13 Aptil-99 28.40 48.80 2.03 May-99 7.80 14.10 0.59 June-99 14.10 24.90 1.04 1998-99 Totals: 295.10 509.40 21.23 l Total Energy Output since initial Criticality: 56,890.24 2,370.43 i

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ENCLOSURE 1 (Continued)

, .NSC 78 - Monthly inforr.ation Sheet NSC-78 l Month: Jul-98 l l Revised 5/12/97 l Cumulative MWH's total teu l Start: 56,380.82 l l _End: l 56,381.00 l 6,682.99 l

  • 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 uC/cc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH max CPM uCl/cc Cl/ day 7167 1 0.10 1057 1132 0.58 0.06 1,000 4.90E-06 0.01 7168 15 0.10 1015 1050 0.58 0.06 1,000 4.90E-06 0.01 7169 29 0.10 1009 1044 0.58 0.06 1,200 5.88E-06 0.01 Totals: 1.75 0.18 0.03

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 1.8 MWH's: 280.0 0.2 Percentage 1% 0%

Stack Releases 0.0 curies i

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i ENCLOSURE 1 (Continued)

. .NSC-78 ' Monthly information Sheet NSC-78 l Month: Aug-98 l { Revised 5/12/97 l Cumulative MWH's TOTAL LEU l Start: 56,381.00 l l End: l 56,402.94 l 6,704.93 l  ;

  • added HEU=49698.01 Run Ave Pwr Start S/D Operating Todays Stack Ar-41 Released No. Day 1.evel Time Time Time total Monitor umit - 4E-4 uc/cc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH maxCPM uCl/cc Cl/dey l

7170 12 0.10 0954 1029 0.58 0.06 1,200 5.88E-06 0.01 I 7171 21 1.84 0900 1600 7.00 12.88 13,000 6.37E-05 1.61 I 7172 26 1.85 1008 1500 4.87 9.00 12,000 5.88E-05 1.03 Il l

Totals: 12.45 21.94 2.65

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 12.5 MWH's: 280.0 21.9 Percentage 9% 8%

Stack Releases 2.6 curies

ENCLOSUREI (Continued)

, .NSC Monthly information Sheet NSC-78 l Month: Sep-98 l l Revised 5/12/97 l Cumulative MWH's TOTAL teu l Start: 56,402.94 l l End: l 56,454.72 l 6,756.71 l

  • 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 uC/cc (1 31) (MW) (hhmm) (hhmm) (hrs) MWH maxCPM uCl/cc Cl/ day 7173 2 0.10 0952 1027 0.58 0.06 12,000 5.88E-05 0.12 7174 3 1.83 0940 1348 4.13 7.56 12,000 5.88E-05 0.87 7175 11 1.77 0949 1600 6.18 10.94 12,000 5.88E-05 1.31 7176 14 1.80 0927 1600 6.55 11.79 12,000 5.88E-05 1.39 7177 17 1.80 0940 1542 6.03 10.86 13,000 6.37E-05 1.38 ,

7178 28 1.80 0913 1505 5.87 10.56 12,000 5.88E-05 1.24 l

Totals: 29.35 51.78 6.32

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 29.4 MWH's: 280.0 51.8 Percentage 21 % 18%

Stack Releases 6.3 curies 1

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ENCLOSUREI (Continued)

, .NSC 78 - Monthly information Sheet NSC-78 l Month: Oct-98 l l Revised 5/12/97 l Cumulative MWH's ToTat leu l Start: 56,454.72 l l End: l 56,575.81 l 6,877.80 l

  • 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 uC/cc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH maxCPM uCl/cc Cl/ day 7179 1 1.77 0947 1600 6.22 11.00 13,000 6.37E-05 1.43 7180 5 1.79 0918 1541 6.38 11.43 13,000 6.37E-05 1.46 7181 8 1.79 0946 1600 6.23 11.16 12,000 5.88E-05 1.32 7182 9 1.70 0909 1545 6.60 11.22 12,000 5.88E-05 1.40 7183 15 1.79 0937 1600 6.38 11.43 13,000 6.37E-05 1.46 7184 16 1.67 0935 1555 6.33 10.58 13,000 6.37E-05 1.45 7185 20 1.80 1309 1430 1.35 2.43 11,500 5.64E-05 0.27 7186 22 1.77 0852 1550 6.97 12.33 15,000 7.35E-05 1.84 7187 23 1.63 1016 1600 5.73 9.35 13,600 6.37E-05 1.31 7188 26 1.78 1110 1545 4.58 8.16 14,000 6.86E-05 1.13 7189 29 1.75 0858 1600 7.03 12.31 14,000 6.86E-05 1.74 7190 30 1.60 0956 1600 6.07 9.71 13,000 6.37E-05 1.39 Totals: 69.88 121.09 16.21

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 69.9 M W H's: 280.0 121.1 Percentage 50 % 43%

Stack Releases 16.2 curies

ENCLOSURE 1 (Continued)

. .NSC-78

  • Monthly information Sheet NSC-78 l Month: Nov-98 l l Revised 5/12/97 l Cun.ulative MWH's TOTAL teu l Start: 56,575.81 l l End: l 56,685.43 l 6,987.42 l
  • added HEU=49698.01 Run Ave Pwr Start S/D l Operating Todays Stack Ar-41 Released No. Day Level Time Time Time total Monitor Limit = 4E-4 uC/cc (I 31) (MW) (hhmm) (hhmm) fhrs) MWH maxCPM uCl/cc Cl/ day 7191 2 1.77 0910 1600 6.03 12.10 15,000 7.35E-05 1.81 7192 5 1.75 0925 1600 6.58 11.52 14,000 6.86E-05 1.63 7193 6 1.61 0913 1600 6.78 10.92 13,000 6.37E-05 1.56 7194 9 1.79 0947 1555 6.13 10.98 13,000 6.37E-05 1.41 7195 12 1.78 0907 1600 6.88 12..?5 14.000 6.86E-05 1.70 7196 13 1.63 1035 1545 5.17 8.42 12,000 5.88E-05 1.09  !

7197 16 1.72 0922 1552 6.50 11.18 13,000 6.37E-05 1.49 i 7198 19 1.78 0926 1600 6.57 11.69 13,000 6.37E-05 1.51  !

7199 20 1.55 0920 1600 6.67 10.33 12,000 5.88E-05 1.41 l 7200 23 1.80 0919 1500 5.68 10.23 14,000 6.86E-05 1.40 j l

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Totals: 63.80 109.62 15.00

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 63.8 MWH's: 280.0 109.6 Percentage 46 % 39%

Stack Releases 15.0 curies 1

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o-ENCLOSUREI (Continued)

, .NSC Monthly Information Sheet NSC-78 l Month: Dec-98 l l Revised 5/12/97 l Cumulative MWH's Tout teu l Start: 56,685.43 l l End: l 56,718.20 l 7,020.19 l

  • added HEU=49698.01 Run Ave PWr Start S/D Operating Todays Stack Ar-41 Released No. Day Level Time Time Time total Monitor Umit = 4E-4 uC/cc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH maxCPM uCl/cc Cl/ day 7201 3 1.70 0951 1600 6.15 10.46 18,000 8.82E-05 1.95 7202 4 1.60 0906 1530 6.40 10.24 14,000 6.86E-05 1.58 7203 14 1.75 0906 1600 6.90 12.08 17,000 8.33E-05 2.07 i

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Totals: 19.45 32.77 5.60

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 19.5 M W H's: 280.0 32.8 i Percentage 14 % 12%

Stack Releases 5.6 curies i

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ENCLOSURE 1 (Continued)

. NSC-78 ' Monthly information Sheet NSC-78 l Month: Jan-99 l l Revised 5/12/97 l Cumulative MWH's TOTAL LEU l Start: 56,718.20 l l End: l 56,728.84 l 7,030.83 l

  • added HEU=49698.01 Run Ave Pwr Start S/D Operating Todays Stack Ar-41 Released 1 No. Day Level Time Time Time total Monitor Limit = 4E-4 uC/cc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH maxCPM uCl/cc Cl/ day 7204 13 1.73 0951 1600 6.15 10.64 17,000 8.33E-05 1.84 Totale: 6.15 10.64 1.84

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 6.2 M W H's: 280.0 10.6 Percentage 4% 4%

Stack Releases 1.8 curies I

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ENCLOSURE 1 (Continued)

NSC-78 Monthly Information Sheet usC-78 l Month: Feb-99 l l Revised 5/12/97 l Cumulative MWH's TOTAL LEU l Start: 56,728.84 l l End: l 56,751.39 l 7,053.38 l

  • added HEU=49698.01 Run Ave Pwr Start S/D Operating Todays Stack Ar41 Released No. Day Level Time Time Time total Monitor Limit = 4E-4 uC/cc (1 31) (MW) (hhmm) (hhmm) (hrs) MWH maxCPM uCl/cc Cl/ day

_7206 2 1.80 0945 1540 5.92 10.65 17,000 8.33E-05 1.77 7207 18 1.75 0912 1600 6.80 11.90 17,000 8.33E-05 2.04 Totals: 12.72 22.55 3.81

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 12.7 MWH's: 280.0 22.6 Percentage 9% 8%

Stack Releases 3.8 curies

ENCLOSURE 1 (Continued) l

. .NSC Monthly Information Sheet NSC-78 l Month: Mar-99 l l Revised 5/12/97 l Cumulative MWH's Tout tru l Start: 56,751.39 l l End: l 56,802.40 l 7.104.39 l

  • 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 uC/cc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH maxCPM uCl/cc Cl/ day 7208 2 1.78 0951 1500 5.15 9.17 18,000 8.82E-05 1.64 7209 9 1.81 0911 1515 6.07 10.98 20,000 9.80E-05 2.14 7210 ]

11 1.75 0906 1441 5.58 9.77 19,000 9.31 E-05 1.87 1 7212 18 1.74 0917 1600 6.72 11.69 18,000 8.82E-05 2.13 7213 24 1.73 1019 1545 5.43 9.40 18,000 8.82E-05 1.73 Totals: 28.95 51.01 9.50

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 29.0 MWH's: 280.0 51.0 Percentage '

21 % 18%

Stack Releases 9.5 curies

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i ENCLOSURE 1 (Continued)

- NSC-78

  • Monthly information Sheet NSC-78 l Month: Apr-99 l l Revised 5/12/97 l Cumulative MWH's ToTu uu l Start: 56,802.40 l l End: l 56,851.18 l 7,153.17 l
  • added HEU=49698.01 Run Ave Pwr Start S/D Operating Todays Stack Ar-41 Released No. Day Level Time Time Time total Monitor Umit = 4E-4 uC/cc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH maxCPM uCl/cc Cl/ day 7214 1 1.75 0855 1600 7.08 12.40 17,000 8.33E-05 2.12 7215 2 1.60 0926 1600 6.57 10.51 16,000 7.84 E-05 1.85 7216 15 1.77 0935 1545 6.17 10.92 18,000 8.82E-05 1.96 7217 22 1.70 0949 1218 2.48 4.22 15,000 7.35E-05 0.66 7218 29 1.76 0954 1600 6.10 10.74 18,000 8.82E-05 1.94 l

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~ Totals: 28.40 48.78 8.53

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 28.4 MWH's: 280.0 48.8 Percentage 20 % 17%

Stack Releases 8.5 curies

ENCLOSUREI

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(Continued)

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  • NSC-78* Monthly information Sheet NSC 78 l Month: May-99 l l Revised 5/12/97 l Cumulative MWH's toTu uu 1 Start: 56,851.18 l l End: 156.865.28 l 7,167.27 l
  • 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 uC/cc (1 31) (MW) (hhmm) (hhmm) (hrs) MWH manCPM uCUcc CUday 7219 18 1.80 0931 1600 6.48 11.67 16,000 7.84E-05 1.83 7220 24 1.80 0933 1054 1.35 2.43 15,000 7.35E-05 0.36 Totals: 7.83 14.10 l 2.19

SUMMARY

Operating Max. Actual Max. Actual  ;

Hours 140.0 7.8 M W H's: 280.0 14.1 Percentage 6% 5%

Stack Releases 2.2 curies J

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ENCLOSURE 1 (Continued)

.NSC 78 - Monthly Information Sheet NSC-78 l Month: Jun-99 l l Revised 5/12/97 l Cumulative MWH's TOTAL LEU l Start: 56,865.28 l l End: l 56,890.21 l 7,192.20 l

  • 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 uC/cc (1-31) (MW) (hhmm) (hhmm) (hrs) MWH marCPM uCUcc CUday 7221 9 1.65 0944 1600 6.27 10.34 15,000 7.35E-05 1.66 7222 30 1.87 0938 1726 7.80 14.59 13,000 6.37E-05 1.79 4

Totals: 14.07 , 24.93 3.45

SUMMARY

Operating Max. Actual Max. Actual Hours 140.0 14.1 MWH's: 280.0 24.9 Percentage 10% 9% j Stack Releases 3.4 curies  ;

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ENCLOSURE 2 EMERGENCY SHUTDOWNS AND SCRAMS

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. , ,The following is a listing of the emergency shutdowns and inadvertent scrams, including the reasons, which -

occuded during the 1998-99 reporting period. This information is required by Technical Specification 6.8.4.b.

DATE RUN# LOGBOOK / PAGE CAUSE 7/1/98 7167 47 / 88 Reactor scram caused by Log N High Period due to noise produced as a result of high humidity.

10/15/98 '7I83 47 / I13 Reactor scram caused by Log N High Period due to noise produced as a result of high humidity.

10/20/98 7187 47/ 121 Reactor shutdown due to loss of period signal and start-up count rate.

I1/13/98 7196 -47 /138 Reactor shutdown due to loss of period signal determined to be caused by a bad connection between the Log N module and the back plane.

1/13/99 7204 47/149 Reactor shutdown due to loss of period signal.

1/26/99 7205 47/151 Reactor scram due to bad Pico connection.

2/2/99 7206 48/4 Reactor scram due to noise on the Log N channel.

3/2/99 7208 48/6 Reactor scram due to noise on the Log N channel.

3/24/99 - 7213 48/12 Reactor scram due to noise on the Log N channel.

Almost all of these problems involved the Log N channel. As a result, RINSC is replacing this channel with the help of the DOE Instrumentation Grant.

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ENCLOSURE 3 MAJOR MAINTENANCE OPERATIONS The following is a listing of the major maintenance operations performed in the 1998-99 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. Campus Wide Evacuation System Installation RINSC is anticipating that at some point in the future, the facility will upgrade it's power level to a 5 MW operation. This will result in the expansion of the emergency planning zone to include several buildings inc!uding University of Rhode Island laboratories, ofHees, and classrooms. Consequently, ADT was hired to install an evacuation button that energizes horns in the Campus Police and Maintenance Buildings.
2. Air Compressor Pump Replacement The pump for the air compressor that controls the confinement building air intake and exhaust dampers -

failed. It was determined that it was not cost effective to repair the pump, so a new one was purchased and installed.

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3. Secondary Pump Replacement .

l In anticipation that RINSC will upgrade to 5 MW operation at some point in the future, one of the secondary loop pumps was replaced with a pump that has a higher flow rate. This was done to enhance ,

the cooling capacity of the system.

4. Clean up Pump Motor Replacement

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The pump motor for the primary water clean-up system failed. It was determined that it was not cost effective to repair the motor, so a new one was purchased and installed.

5. Fire Alarm System Installation A new fire alarm system was installed by ADT, The system was inspected and approved by the local  ;

Fire Marshall. The system includes more sensors (smoke, heat), and provides coverage of additional j areas in the facility.

6. Underground Storage Tank Removal The underground tanks, originally installed for the purpose of holding pool water when the pool _was being drained, were removed and placed in the north driveway for further decontamination and eventual j disposal. The tanks had been retired from use for a number of years, after it was discovered that they werc leaking.
7. Evacuation Horn Silence Button Installation An evacuation ahum horn silence button was installed in the office wing outside confinement. This button silences the audio alarm without affecting the confinement air handling system. During the course of past emergency drills, it had been suggested that this be add :d, so that during an emergency, the staff would not be forced to listen to the alarm, while it was worki sg in the Emergency Support Center, located in the office wing.

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ENCLOSURE 3 .

(Continued)

-< , :- 8 (Ms; Tank Drain Line Reconnguration' in anticipation that the old pool water demineralizer system will be removed soon, the delay tank drain line was reconfigured so that a clear floor path will k available to expedite the moving of the old -

demineralizer and water softener tanks.

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.0,< b ENCLOStiRE 4 ~

FACILITY CHANGES - 10CFR$0.59 REVIEW

~, - , TV following is a listing and description of 10CFR50.59 evaluations conducted during the 1998-99 reporting period. This infortnation is required by Technical Specification 6.8.4.d.

NONE THIS REPORTING PERIOD t

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. .l. Envimnmental Surveys Outside the Facility - Technical Specification 6.8.4.e Quarterly TLD badges are deployed outside the reactor building in three separate locations. These locations are not frequented by the general public 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 1998 4 QTR 1998 1" QTH 1999 2'" QTR 1999 Northeast Wall 270 320 300 270

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Demineralizer 30 120 60 30 Door licat Exchanger 10 20 20 <10 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 11.60 mrem over the course oflast 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 dsf and applying the occupancy factor of 0.01, the annual dose that would be received by an individual at the Demineralizer Door would be 2.40 mrem. Likewise the dose received at the Heat Exchanger Door would be 0.60 mrem.

2. Annual Exposures Exceeding 500 mrem . Technical Specification 6.8.4.f There were no personnel exposures greater than the above limit.
3. Radioactive Efnuents - Technical Specification 6.8.4.g A. Gaseous effluent concentrations are documented on the Monthly Information Sheets (Form NSC-
78) enclosed. The gaseous efnuents, primarily Argon-41, are about 3-4% of the maximum permissible concentrations.

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). The concentrations are well below the monthly sewer release limits.

DATE VOLUME ACTIVITY  % OF LIMIT ORIGIN 8/31/98 3000 gallons 3.170 mci 3% Delay Tank 1/7/99 450 gallons 175 microci 1% Pool Water / Lab Sinks 1/11/99 860 gallons 282 microCi 0.8 % Underground Tank I/12/99 900 gallons 93 microCi 0.3 % Underground Tanks

  • Note : The water contains a mixture ofisotopes, the principle ones being Sc-46, Sb-122, and H-3.

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