ML18031B198
| ML18031B198 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 02/11/1987 |
| From: | Gridley R TENNESSEE VALLEY AUTHORITY |
| To: | Muller D NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation |
| References | |
| TAC-64700, TAC-64701, TAC-64702, NUDOCS 8702190389 | |
| Download: ML18031B198 (13) | |
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ACCESSION NBR FAC IL:50-259 50-260 50-296 AUTH. NAffE GRIDLEY> R.
REGULATORY I
-ORf'fATIQN DISTR lBUTION SYST f
(R IDS) 8702190389 DQC. DATE: 87/02/11 NOTARIZED:
NO DOCKET 0 Brogans Fev v g Nucleav'ouer Station~
Unit 1>
Tennessee 05000259 Brogans Ferry Nucleav Pouer Stations Unit 2.
Tennessee 05000260 Brogans Ferry Nucleav'ouer Station>
Unit 3>
Tennessee 05000296 AUTHOR AFFILIATION Tennessee Val 1 eg Auth ar itg RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
For>ards addi inFo required
%or NRC revie~ of Topical Rept CNSI-DN-11118-01-P>
"Chem-Nuc 1eav Sgs~ Inc i.Debater ing Contv ol Pv ocess Containev s Topical Rept. " Appv oval v.equested 6'r use in v'adiological efFluent Tech Specs Amend,TVA; BFN TS-221.
DISTRIBUTION CODE:
A001D COPIES RECEIVED: LTR ENCL SI ZE:
TITLE:
OR Submittal:
Geneval Distribution NOTES: NNSS/FCAF ice.
NNSS/FCAF/Pf'f icy.
QIA icy.
NNSS/FCAF 1 c g.
NNSS/FCAF/Pl'f 1 c g.
0IA 1 c g.
NNSS/FCAF icy.
NNSS/FCAF/Pl'f ice.
OIA icy.
05000259 05000260 05000296 RECIPIENT ID CODE/NAl'IE BNR EB BNR FOB BWR PD2 PD 04 BIJR PSB INTERNAL: ACRS 09 ELD/HDSe NRR/GRAS COPIES
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1 1
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TENNESSEE VALLEYAUTHORITY CHATTANOOGA. TENNESSEE 37401 5N 157B Lookout Place PQB 1 1 1987 U.S. Nuclear Regulatory Commission Attn:
Document Control Desk Office of Nuclear Reactor Regulation Washington, D.C.
205S5 Attention:
Mr. D.
R. Muller In the Matter of the Tennessee Valley Authority Docket. Nos. 50-259 50-260 50-296 BROWNS FERRY NUCLEAR PLANT (BFN) PROCESS CONTROL PROGRAM FOR DEMINERALIZER RESIN DEWATERING Demineralizer resin dewatering is performed at BFN using equipment, fabricated by TVA to meet Chem-Nuclear
- Systems, Inc.,
(CNSI) equipment specifications.
BFN has adopted the operating methodology outlined by CNSI in a topical report (CNSI-DW-11118-Ol-P) titled, "CNSI Dewatering Control Process Containers Topical Report."
NRC accepted this topical report for reference by license applicants in a letter from C. 0.
Thomas (NRC) to L. K. Poppe (CNSI) dated June 11, 1985.
The enclosure provides information required by NRC to review applicability of the report to specific licensees as outlined in the associated safety evaluation.
We request that NRC review the enclosed information and provide approval for use of this report as a process control program as defined in the Radiological Effluent Technical Specification (RETS) amendment (TVA BFN TS-221, dated September 30, 1986). It is further requested that.
NRC approval of the process control program coincide with the RETS implementation date or that the submittal be accepted on an interim basis until approval of the program is finalized.
If you have any questions concerning this request, please call L. V. Tonty at (205) 729-2677.
Very truly yours, TENNESSEE VALLEY AUTHORITY R.
ridley Director Nuclear S fety and Licensing Enclosure cc:
See page 2
8?02190389 870211 PDR ADOCK 05000259 P
An Equal Opportunity Employer
~O U.S. Nuclear Regulatory Commission FEB 111987 cc (Enclosure):
U.S. Nuclear Regulatory Commission Region II Attn:
Dr. J. Nelson Grace, Regional Administrator 101 Marietta Street, NM, Suite 2900 Atlanta, Georgia 30323 Mr. G.
E. Gears Browns Ferry Project Manager U.S. Nuclear Regulatory Commission 7920 Norfolk Avenue
- Bethesda, Maryland 20814 Mr. G.
G. Zech, Director TVA Projects U.S. Nuclear Regulatory Commission 101 Marietta St.,
NM, Suite 2900 Atlanta, Georgia 30323 Browns Ferry Resident InsPector Browns Ferry Nuclear Plant P.O.
Box 311 Athens; Alabama 35611
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ENCLOSURE Dewatering is conducted at BFN using plant equipment and plant personnel.
Chem-Nuclear
- Systems, Inc.,
(CNSI) high-integrity containers and the CNSI dewatering procedures are used.
EXCEPTIONS OR DEVIATIONS TAKEN TO CNSI TOPICAL REPORT DATED DECEMBER 1983.
BFN dewaters powdered resin, filter media, and mixtures of powdered resin with small quantities of bead resin (normally less than 10 percent bead resin) using Chem-Nuclear high-integrity containers and a plant specific version of Chem-Nuclear Procedure FO-OP-022, "Ecodex Precoat/Powdex/Solka-Floe/Diatomaceous Earth Dewatering Procedure for CNSI 14-195 or Small Liners."
The dewatering system was fabricated by TVA to meet the equipment specifications in FO-OP-022.
The TVA dewatering system differs from the Chem-Nuclear system in that:
(a)
TVA's system has no off-gas collector.
The high integrity containers are open to the waste packaging room air during. filling and dewatering.
Air from this room is normally discharged through the Radwaste Building ventilation system.
This air then flows through a HEPA filter and is released through a monitored release point on the Reactor Building roof.
(b)
The valves on the pump suction manifold are manually operated.
The system is not operated remotely.
However, the high-integrity containers are enclosed behind a shielded wall or inside a shielded cask during filling and dewatering, to keep radiation levels in the vicinity of the system near background.
(c)
There are no vacuum gauges at each inlet connection.
A single vacuum gauge is provided at the flush inlet connection to the manifold.
This vacuum gauge will indicate a break in vacuum in any active (not isolated) filter set.
Loss of vacuum normally occurs in sequence from the top to the bottom set of filters.
Mhen vacuum breaks at a given filter level, that level is isolated.
Therefore, vacuum is monitored continually for all active filter sets.
(d)
There is no automatic level control or level indicating instrument in the TVA dewatering system.
Level is determined by visual observation.
TVA has conducted tests which conclude that mixtures of bead and powdered resin, in proportions of up to 50-percent
- bead, can be adequately dewatered using a modified procedure for dewatering powdered resin.
These tests were conducted using TVA-fabricated steel liners with dewatering internals similar to those found in the Chem-Nuclear high-integrity containers and a dewatering pump which is inferior to that
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specified in FO-OP-022, in that it is limited to a vacuum of 13" Hg and has a flow rate of six SCFM.
In addition, the dewatering procedure used for the tests called for only four hours of bulk dewatering, as opposed to three eight-hour pumping cycles specified in FO-OP-022.
The conditions of the test were clearly less conducive to proper dewatering than those specified in FO-OP-022 (this equipment and procedure is not used for normal operation).
However, results show that adequate dewatering is guaranteed either by extending the dewatering time in the procedure or by applying an additional dewatering cycle at the end of the bulk dewatering process using a high flow rate (approximately 200 SCFM at 28" Hg) vacuum pump.
TVA has modified FO-OP-022 to include two hours of additional dewatering with the 200 SCFM vacuum pump for all resin.
2.
INTERFACES BETWEEN PLANT AND CNSI EQUIPMENT (a)
The high-integrity container is filled with spent resin slurry through a one-inch flexible hose.
Flow through the hose is controlled by way of a diaphragm-operated valve.
The hose is connected to the high-integrity container with an Evertight quick disconnect fitting that has been modified for remote operation.
(b)
The dewatering pump discharges through a one-inch flexible hose to the plant waste packaging drain header which leads to the waste package drain tank.
The connection to the header is made by an OPW 633 D Kamlock quick disconnect fitting.
(c)
Radwaste compressed air is supplied through a flexible hose with Chicago connections to the air operated positive displacement pump.
(d)
Demineralized water is provided by a flexible hose with Chicago connections to the flush-inlet valve on the dewatering pump suction manifold.
(e)
The dewatering system is located inside the radwaste packaging room (see figure l).
Any leaks or spills will be contained inside this room by exterior doors which are closed during filling, and collected in radwaste floor drains.
Failure of any of these resin processing components will not provide a pathway for radioactive materials into the environment or potable water supply.
3.
LOCATION AND ARRANGEMENT OF DEWATERING SYSTEM IN PLANT See Figure l.
WASTE CLASSIFICATION TO MEET 10 CFR 61.55 Radionuclide concentrations are determined by direct measurement.
Samples or smears, as appropriate, of standard waste streams are sent offsite for analysis.
An inferential measurement program is then established whereby, concentrations of radioisotopes which cannot be readily measured are projected through ratioing to concentrations of similar behaving isotopes which can be readily measured.
Scaling factors are developed on a waste stream specific basis.
Scaling factors are periodically reconfirmed through sampling and analysis.
A QC program is in place to ensure compliance with 10 CFR 61.55 and 61.56.
DESCRIPTION OF WASTE CONTAINER High-integrity containers manufactured by CNSI are used for packaging resin.
The following containers are used:
8-120,14-195, 14-170 and are discussed in a topical report dated December 1983 entitled, "Chem-Nuclear
- Systems, Inc., Topical Report Polyethylene High Integrity Containers CNSI-HIC-14571-01-NP."
CAPABILITY TO MEET 10 CFR 50 APPENDIX I This dewatering process does not cause any direct releases to the environment (note l.a above).
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Reference:
Browns Ferry FSAR 9.2 1 b 104 ft. 3 in.
I Crane Operator Platform 29 ft. Din.
h1eldln 10'5" Chem Nuclear System TRUCK Wb Wc Wd Wp Waste Packaging Room Layout For Chem Nuclear System Plan Elevation 565'