ML20244C886

Addendum to Semiannual Rept:Effluent & Waste Disposal for Jan-June 1988

ML20244C886
Person / Time
Site:	Davis Besse
Issue date:	06/30/1988
From:	Storz J TOLEDO EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
AVE-89-70253, NUDOCS 8904210031
Download: ML20244C886 (11)

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Addendum to l The Semiannual Report:

Effluent and Waste Disposal Davis- Besse Nuclear Power Station Unit No.1 January 1,1988, through June 30,1988 Docket Number 50-346 License Number NPF-3

, Toledo Edison Company 300 Madison Avenue Toledo, Ohlo 43652 April,1989 b kOObK 6 bk [

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Table of Contents i

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' Preface 1 1 Supplemental Information

' Abnormal Releases A-1 ,j Percent of Technical Specification Limits A-2 Effluent Data Tables

-Gaseous Effluents - Summation of all' Releases- B-1 Gaseous Effluents - Mixed Mode Releases B-2'

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-Preface 1

On' January 20, 1988, a small amount of noble gases (primarily Xe-133)'was released into the clean Vaste Receiver Tank 1-1 area as the result of a gas:

sampling tube becoming dislodged from.its fitting. The noble gases were discharged via the station vent and were fully monitored. The total amount of l~ ' radioactivity released was approximately 1.0 curie of Xe-133. This is less than 1% of the total noble gas released in 1988. 'This-release resulted in an offsite dose of less than 0.001 millirem during the entire. release, which is only 0.000%

of the limits for!whole body exposure due to noble gases.-

l Due to the extremely small quantity of radioactivity involved, this was not reported as a release in the' Semiannual Effluent and Waste Disposal Report for January 1 through' June 30,.1988.

This addendum incorporates this release. . The changes in the Supplemental Information Section (Abnormal Releases and Percent of Technical Specifications Limits) and the Effluent Data Tables-(Gaseous Effluents-Summation of all Releases and Gaseous Effluents - Mixed Mode Releases) are included in this addendum. Due to the extremely small dose associated with this release, there were no changes to the dose tables.

The data from this release were included in the Semiannual Report for the period of Jaly 1 through December:31,- 1988.

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Appendix A Supplemental Information l

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L ABNORMAL RELEASES-l 1. .On January 20,.1988 a. Chemistry Lab Tester sampled:the Clean Vaste Receiver Tank (CVRT) 1-1 for daily gas analysis. At 1900,.the Radvaste Exhaust Monitor, RE5405A, alarmed. 'At approximately 1920, a Radiological Controls

. Tester entered the CVRT 1-1 room and discovered the tygon tubing used for sampling had become dislodged from its fitting within the local isolation

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. valve. As a result, a very small amount of noble gases (primarily Xe-133). .

were released into the CVRT 1-1 area. .The tygon tubing was reconnected at approximately'.1920.

l The noble gases were. discharged via'the station' vent and were fully monitored. A maximum concentration of.5.0E-06 pCi/cc was measured at approximately 1837. . The average concentration'of 2.0E-06 pCi/cc.is used to determine the-total released activity based on a release duration of 110 minutes. .This duration is interpreted from.the monitor. data, based on a.

noticeable rise in Xe-133 concentration'at 1800 and a decrease'at 1950. -The total' amount of radioactivity released is approximately 1.0 curie of Xe-133.

This resulted in an offsite dose of less than 1.0E-03 millirem during the entire releare. Per Section 3.11.2.1 and'3.11.2.2 of the Davis-Besse Technical Specifications, no limit was. exceeded.- This release was only 2.0E-03% of the limit for whole body _ exposure..

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Appendix B Effluent Data Tables I

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2. PERCENT OF TECHNICAL SPECIFICATIONS LIMITS The following table presents the technical specifications limits and the amount of radioactivity, in percent of limits, released during January through June, 1988.

-SPECIFICATION LIMIT PERCENT OF LIMITS A. Quarterly: Gaseous First Quarter, 1988 Noble gases (gamma). 5.0 mrad /qtr 4.42E-02 Noble gases (beta) 10.0 mrad /qtr 6.73E-02 I-131, tritium, and' radionuclides 7.5 mrem /qtr 1.32E-01 in particulate form with half-lives greater than 8 days B. .Q uarterly: Gaseous Second Quarter, 1988 Noble gases (gamma) 5.0 mrad /qtr 1.76E-02 ,

Noble gases (beta) 10.0 mrad /qtr 2.00E-03  !

I-131, tritium, and radionuclides 7.5 mrem /qtr- 3.18E-02 in particulate form'vith half-lives greater than 8 days C. Calendar year: Gaseous Noble gases (gamma) 10.0 mrad / year 3.09E-02 Noble gases (beta) 20.0 mrad / year 3.47E-02 I-131, tritium, and radionuclides 15.0 mrem / year 8.21E-02  ;

in particulate form with half-  ;

lives greater than 8 days l D. Quarterly: Liquid First Quarter, 1988 1

Total body 1.5 mrem /qtr 5.77E-01 Any organ (liver) 5.0 mrem /qtr 2.35E-01 1

E. Quarterly: Liquid i Second Quarter, 1988 )

l Total body 1.5 mrem /qtr 3.09E+00 l Any organ (liver) 5.0 mrem /qtr 1.29E+00 l I

F. Calendar year: Liquid j j Total body: 3.0 mrem / year 1.83E+00 J I

Any organ (liver) 10.0 mrem / year 7.65E-01 L

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'lj TABLE 1 GASEOUS EFFLUENTS - SUMMATION OF ALL RELEASES EST. TOTAL FIRST SECOND PERCENT TYPE UNIT OUARTER QUARTER ERROR A. Fission and Activation Gases

1. Total Release Ci 1.06E+02 1.30E+00 2.00E+01

2. Average Release uCi/sec 1.35E+01 1.65E-01

3. Percent of Technical  % See App. A, Specifications Limits Section 7 B. Iodines

1. Total Iodine ci 5.76E-04 1.24E-05 2.00E+01

2. Average Release uCi/sec 7.33E-05 1.58E-06 Rate for Period

3. Percent of Technical  % See App. A, Specifications Limits Section 7 C. Particulate

1. Particulate with Ci All were less than LLD half-lives greater than 8 days

2. Average Release Rate uCi/sec N/A N/A N/A for Period

3. Percent of Technical  % N/A N/A N/A Specifications Limits

4. Gross Alpha Activity Ci 2.15E-07 1.29E-07 2.00E+01 D. Tritium

1. Total Release Ci 1.29E+00 4.26E+01 2.00E+01

2. Average Release uCi/see 1.64E-01 5.42E+00 Rate for Period

3. Percent of Technical  % See App. A Specifications Limits Section 7 l

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[- GASEOUS EFFLUENTS - MIXED MODE RELEASES q CONTINUOUS MODE BATCH MODE FIRST SECOND 'FIRST SECOND-NUCLIDES UNIT OUARTER QUARTER QUARTER QUARTER

1. Fission Gases Cl Kr-85 NA NA 3.27E400 2.41E-01 Kr-88 NA : 9.96E NA NA Xe-131m NA NA NA 1.93E-02 Xe-133m- .NA NA 1.59E NA Xe-133 6.83E+01' NA' 3.33E+01 4.31E-02 Xe-135 1.07E+00 NA 4.65Ea02 NA' Total for. Period- '6.94E+01 9.96E-01 3.67E+01 3.03E 2. ' Iodines Ci-

'I-131 4.54E-04 1.24E-05 NA NA I-133 1.22E-04 NA NA .NA Total'for Period- 5.76E-04 1.24E-05 NA. NA 3.. Tritium Ci 1.27E+00 4.26E+01 2.23E-02 4.07E-04

4. Particulate Ci NA NA NA NA

5. Strontium Ci Quarterly Composite From Station Vent Sr-89 <2.52E <3.30E-07 NA NA

<4.21E-08 <4.13E-08 NA NA B-2

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TOLEDO

%ms EDISON EDISON PLAZA '

300 MADISON AVENUE TOLEDO, OHIO 43652 0001 Letter Number: AVE 89-70253 File Number E 2.30.2.2-Docket Numberss50-346 License Number: NPF ,

Date April 12, 1989 United States Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Subj ect: Addendum to Semiannual Effluent and Waste Disposal Report Gentleme.n:

Enclosed find two (2) copies of the Addenduni to the Toledo Edison Semiannual Effluent and Vaste Disposal Report for Davis-Besse Nuclear Power Station, Unit No. 1 for January 1 through June 30, 1988.

rhe applicable. portions of Reg latory Guides 1.109, 1.111 and 1.113 have been used along with NUREG-0133 for dose calculations and meteorological

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modeling methodology to demonstrate compliance with Appendix I to 10 CFR Part 50.

This addendum documents e previously unreported release of noble gases which has recently been v:-classified as a release.

Very truly yours,

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Louis F.' Storz Plant Manager Davis-Besse Nuclear Power Station, Unit No. 1 EAD/jal Enclosures I l

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J': -:o Letter Numbers' AVE 89-70253-

' File Number: E 2.30.2.2:

Docket Number: 50-346

( License ~ Number NPF Dates. April _ 12,-1989-1, ces- 'P. M. Byron.(1 copy).

'U.S. NRC Resident Inspector l A. B. Davis (2 copies)

NRC Regional' Administrator T. V. Vambach (1 copy)

NRC/NRR Davis-Besse Project Manager

'L'.'S. England (1 copy)

Environmental Compliance' Supervisor J. P.'Greer (1 copy)

Ottawa County' Emergency Management Agency

. E.'Hsmmett (1 copy)

Ohio Environmental Protection Agency' Northwest Distrf et Office J. J. Johnson Senior Engineer - I.S.E.

T. J. Myers (1. copy)

Director, Technical Services R.'M. Quillin (1' copy)

Ohio. Department of Health

.L. O. Ramsett (1 copy)

Director - DB Quality Assurance R.-V. Schrauder (1 copy) i Manager - Nuclear Licensing D. C. Shelton (1 copy)

Vice President, Nuclear D. Sherman (1 copy)

American Nuclear Insurers R. Stevenson (1 copy)

Collins' Park Water Treatment Plant W. Vegner (1 copy)

~ Beta, Inc.

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