ML19212A284
| ML19212A284 | |
| Person / Time | |
|---|---|
| Site: | Rhode Island Atomic Energy Commission |
| Issue date: | 07/26/2019 |
| From: | Martin P State of RI, Atomic Energy Comm |
| To: | Patrick Boyle Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML19212A284 (11) | |
Text
STATE OF RHODE ISLAND AND PROVIDENCE PLANTATIONS Rhode Island Atomic Energy Commission 16 Reactor Road Narragansett, RI 02882-1165 Telephone # 401-874-2600 July 26, 2019 Docket No. 50-193 Document Control Desk U.S. Nuclear Regulatory Commission (NRC) 11555 Rockville Pike Rockville, Maryland 20852 Attn: Mr. Patrick Boyle, Project Manager
Dear Mr. Boyle:
This letter and the enclosures constitute the annual report required by the RINSC Technical Specifications (Section 6.7.1). Enclosure 1 provides reactor operating statistics. Enclosure 2 provides information pertaining to unscheduled 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 401-874-9442.
Sincerely, Paul W Martin Jr Reactor Supervisor Enclosures (5)
Copy to:
Mr. Michael Takacs , USNRC Dr. John J. Breen, Chairman, NRSC Dr. Clinton Chichester, Chairman, RIAEC Dr. Nancy Breen, RIAEC Mr. Howard Chun, RIAEC Dr. Yana K. Reshetnyak, RIAEC Dr. Nitin Padture, RIAEC
Enclosure 1 Reactor Operating Statistics Technical Specification Section 6.7.1.1 Operating MWH of Month Year Hours Operation July 2018 17.27 16.25 August 2018 22.90 23.50 September 2018 23.98 27.95 October 2018 35.48 38.87 November 2018 41.20 44.97 December 2018 19.53 19.76 January 2019 82.62 126.98 February 2019 66.68 76.76 March 2019 29.15 26.85 April 2019 29.65 23.60 May 2019 29.53 37.71 June 2019 5.87 5.90 469.0 MWH or Total FY2019 403.87 19.54 MWD Total Energy Output Since Initial Criticality 67,833.31 MWH or 2826.39 MWD
ENCLOSURE 2 UNSCHEDULED SHUTDOWNS OR SCRAMS Technical Specification Section 6.7.1.2 Page 1 of 1 The following is a list of the unscheduled shutdowns or scrams that occurred during the 2018-2019 reporting period:
Date Run Log Page Cause Description No. book 09/26/18 9466 64 94 Short period Spurious scram due to instrument noise 10/09/18 9471 64 99 Scram magnet All blades dropped twice during this power lost startup, no scram indication, cause is believed to be improper makeup of contacts on mode select switch.
10/18/18 9474 64 104 Scram magnet All blades dropped during this startup, no power lost scram indication, cause is believed to be improper makeup of contacts on mode select switch.
10/30/18 9475 64 106 Scram magnet All blades dropped during this startup, no power lost scram indication, cause is believed to be improper makeup of contacts on mode select switch 11/05/18 9477 64 110 Scram magnet All blades dropped twice during this power lost startup, no scram indication, cause is believed to be improper makeup of contacts on mode select switch.
01/23/19 9497 64 140 Scram magnet All blades dropped, no annunciators or power lost indications of a scram, appears to have been a power perturbation causing magnet power to cycle and blades to drop.
02/05/19 9504 64 147 Scram magnet All blades dropped twice during this power lost startup, no scram indication, cause is believed to be improper makeup of contacts on mode select switch.
3/21/19 9525 65 14 Watchdog scram Control rod computer comm error 4/4/19 9532 65 23 WR power CH 1 Wide range power channel 1 anomaly 4/16/19 9538 65 29 WR power CH 2 Wide range power channel 2 anomaly
ENCLOSURE 3 MAINTENANCE OPERATIONS Technical Specification 6.7.1.3 requires a listing of the major maintenance operations performed in the 2018-2019 reporting period including their impact upon the safe operation of the reactor and the reasons for the corrective maintenance.
No major maintenance has been performed in this reporting period.
ENCLOSURE 4 FACILITY CHANGES - 10CFR50.59 REVIEW Technical Specification 6.7.1.4 requires that we provide a listing and description of any 10 CFR 50.59 evaluations conducted during the 2018-2019 reporting period.
No 10 CFR 50.59 evaluations were performed in this reporting period.
ENCLOSURE 5 RADIOLOGICAL CONTROLS
- 1. Environmental Surveys outside the Facility - Technical Specification 6.7.1.6 Quarterly TLD1 badges are deployed outside the reactor building in three separate locations. The quarterly doses in units of mrem are shown in the table below.
LOCATION 3rd QTR 4th QTR 1st QTR 2nd QTR 2018 2018 2019 2019 Northeast Wall 10 214 98 13 Demineralizer Door 23 49 72 28 Heat Exchanger 15 26 28 17 Door The general public does not frequent these locations and therefore occupancy factors may be used to approximate annual dose. The allowable annual external dose for whole body must be below 100 mrem per year. Assuming that the maximum time that a member of the general public would be present in one of these locations is 10 minutes per day, an occupancy factor of 0.025 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 annual dose at the Northeast Wall, 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 0.025 2, the annual dose that would be receive by an individual in the demineralizer room would be 4.3 mrem. The dose received at the Heat Exchanger Door would be 2.15 mrem. The annual dose received at the Northeast wall would be 8.38 mrem. The variations from quarter to quarter and from previous reports are also due in part to movements of items within the reactor building during the fiscal year and varying use of the different irradiation facilities.
- 2. Annual Exposures Exceeding 500 mrem for facility members, 100 mrem for non-staff members or 10 mrem for members of the general public - Technical Specification 6.7.1.7 There were no personnel exposures greater than Technical Specification 6.7.1.7.
requirements.
1 Thermoluminescent Dosimeter; Mirion Technology reads the dosimeters at minimum of 1 mrem.
2 Occupancy factor was changed from 0.01 to 0.025. 0.01 was derived using occupancy factor and use factor (it was assumed that the reactor is not running 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> every day). We will use 0.025, from NCRP 147 for Outdoors, unattended parking lots, attics, stairways, unattended elevators, janitors closets. 0.025 is more conservative number than 0.01.
- 3. Radioactive Effluents - Technical Specification 6.7.1.5 A. Individual gaseous effluent concentrations for each reactor operation are recorded on the Monthly Information Sheets (Form NSC-78). The concentration of radioactive materials in the effluent released from the facility exhaust stacks shall not exceed 1E+05 times concentrations specified in 10CFR20, Appendix B, Table II, when averaged over time periods permitted by 10CFR20.3 Gamma spectroscopy of stack gas samples has shown that the principal gaseous effluent is Argon-41. The maximum concentration for this principle contaminant permitted under Technical Specifications is 1E-8 Ci/cc x1E+5 = 1E-3 Ci/cc.
Average concentrations released during the year were 4.3E-5 Ci/cc and less than 0.043 of the limit.
The total Argon-41 release during the reporting period was 78.37 curies. The calculated effective dose equivalent for this release is 1.6 mrem/year (COMPLY Code). The Comply Code report is attached.
B. Liquid effluent concentrations released to the environment are documented on the Sewer Discharge Report (NSC-09). Each release was approved prior to discharge with its pH being within the acceptable range and with the sum of the fractions of the respective radioisotopes per month being below the discharge limit of 1. For the reporting period, the total volume of discharge was 6.804E6 ml. The isotopes and their relative activities discharged are given below.
Radioisotope Total Activity Discharged (microcuries)
H-3 644.85 C-14 788.75 Pb-214 1.80 Bi-214 2.63 K-40 1.29 Sb-124 0.13 I-124 0.22 In-114m 0.01 3
Technical Specifications, Section 3.7.2.1
2019report
COMPLY:V1.7.7/10/20192:32
40CFRPart61
NationalEmissionStandards
forHazardousAirPollutants
REPORTONCOMPLIANCEWITH
THECLEANAIRACTLIMITSFORRADIONUCLIDEEMISSIONS
FROMTHECOMPLYCODEV1.7.
Preparedby:
RIAtomicEnergyCommission
RINuclearScienceCenter
16ReactorRoad,Narragansett,RI02882
SanghoNam
4018742600
Preparedfor:
U.S.EnvironmentalProtectionAgency
OfficeofRadiationandIndoorAir
Washington,DC20460
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2019report
COMPLY:V1.7.7/10/20192:32
2019Ar41Release
SCREENINGLEVEL4
DATAENTERED:
ReleaseRate
Nuclide(curies/YEAR)
AR417.837E+01
Releaseheight35meters.
Buildingheight18meters.
Thesourceandreceptorarenotonthesamebuilding.
Buildingwidth18meters.
Buildinglength20meters.
STACKDISTANCES,FILE:stackdata100.dat
Distance
DIR(meters)
N100.0
NNE100.0
NE100.0
ENE100.0
E100.0
ESE100.0
SE100.0
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2019report
SSE100.0
S100.0
SSW100.0
SW100.0
WSW100.0
W100.0
WNW100.0
NW100.0
NNW100.0
COMPLY:V1.7.7/10/20192:32
WINDROSEDATA,FILE:2016Windrosedata2m.dat
Sourceofwindrosedata:2016Windrosedata
Datesofcoverage:19541994
Windroselocation:Narragansett,RI
Distancetofacility:155m
Percentcalm:0.05
WindSpeed
FROMFrequency(meters/s)
N0.0622.00
NNE0.0582.00
NE0.0442.00
ENE0.0132.00
E0.0122.00
ESE0.0132.00
SE0.0582.00
SSE0.0492.00
S0.0582.00
SSW0.0842.00
SW0.1052.00
WSW0.0642.00
W0.0682.00
WNW0.0952.00
NW0.1042.00
NNW0.0682.00
DistancefromtheSOURCEtotheFARMproducing
VEGETABLESis155meters.
DistancefromtheSOURCEtotheFARMproducing
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2019report
MILKis100meters.
DistancefromtheSOURCEtotheFARMproducing
MEATis100meters.
NOTES:
Thereceptorexposedtothehighestconcentrationislocated
100.metersfromthesourceintheNEsector.
HegetshisVEGETABLESfromafarmlocated
155.metersfromthesourceintheNEsector.
HegetshisMEATfromafarmlocated
100.metersfromthesourceintheNEsector.
HegetshisMILKfromafarmlocated
100.metersfromthesourceintheNEsector.
Inputparametersoutsidethe"normal"range:
COMPLY:V1.7.7/10/20192:32
WindrosewindfrequencyisunusuallyLOW.
RESULTS:
Effectivedoseequivalent:1.6mrem/yr.
***Complyatlevel4.
ThisfacilityisinCOMPLIANCE.
ItmayormaynotbeEXEMPTfromreportingtotheEPA.
YoumaycontactyourregionalEPAofficeformoreinformation.
**********ENDOFCOMPLIANCEREPORT**********
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