ML20141H147
| ML20141H147 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 04/22/1986 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE |
| To: | Noonan V Office of Nuclear Reactor Regulation |
| References | |
| SBN-1013, NUDOCS 8604240097 | |
| Download: ML20141H147 (10) | |
Text
m W
SEABROOK STATION Engineering Office Pubic Service of New Hampshre
~ April 22, 1986 SBN-1013 New Hompshire Yankee Division T.F. 87.1.2 United States Nuclear Regulatory Commission Washington, DC 20555 Attention:
Mr. Vincent S. Noonan, Project Director PWR Project Directorate No. 5
References:
(a)
Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b) USNRC Letter, dated April 7,1986, "Seabrook Solid Radwaste System (FSAR Section 11.4)," V. Nerses to R. J. Harrison
Subject:
Seabrook Solid Radwaste System (FSAR Section 11.4); RAI
Dear Sir:
In Reference (b), the Staf f requested additional information concerning the Solid Radwaste System (FSAR Section 11.4) submitted in FSAR Amendment 56.
In response to this request, enclosed please find Attachments 1 and 2 which address the Staff's questions.
It should be noted that Attachment 2 is also a revision to FSAR Section 11.4.1.1, which will be incorporated into the FSAR via a future amendment.
We trust the information provided herewith is acceptable and request the resolution of this issue (SER Outstanding Issue No. 14) be reflected in the upcoming supplement to Seabrook's SER.
Very truly yours, lW John DeVincentis, Director Engineering and Licensing Enclosures cc: Atomic Safety and Licensing Board Service List 8604240097 860422 k
PDR ADOCK 05000443 00 E
(
I P.O. Box 300 Soobrook. NH 03874. Tolophone (603) 474%21
Dicn3 Curran, Esquire Calvin A. C nnsy Harmon & Weiss City Manager 2001 S. Street, N.W.
City Hall Suite 430 126 Daniel Stre4L Washington, D.C.
20009 Portsmouth, NH 03801 Sherwin E. Turk, Esq.
Stephen E. Merrill, Esquire Office of the Executive Legal Director Attorney General U.S. Nuclear Regulatory Commission Coorge Dana Bisbee, Esquire Tenth Floor Assistant Attorney General Washington, DC 20555 Office of the Attorney General 25 Capitol Street Robert A. Backus. Esquire Concord, NH 03301-6397 116 Lowell street P.O. Box 516 Mr. J. P. Nadeau Manchester, NH 03105 Selectmen's Office 10 Central Road Philip Ahrens, Esquire Rye, NH 03870 Assistant Attorney General Department of The Attorney General Mr. Angle Machiros Statehouse Station 76 Chairman of the Board of Selectmen kugusta. MI 04333 Town of Newbury Newbury, MA 01950 Mrs. Sandra Cavutis Chairman, Board of Selectmen Mr. Willian 3. Lord RFD 1 - Box 1154 Board of selectmen Kennsington, NH 03827 Town Hall - Friend Street Amesbury, MA 01913 Carol S. Sneider, Esquire Assistant Attorney General Senator Gordon J. Humphrey Department of the Attorney General 1 Pillsbury Street One Ashburton Plack, 19th Floor Concord, NH 03301 Boston, MA 02108 (ATTN: Herb Boynton)
Senator Gordon J. Humphrey H. Joseph Flynn, Esquire U.S. Senate Office of General Counsel Washington, DC 20510 Federal Emergency Management Agency g (ATTN: Tom Burack) 500 C street, SW Washington, DC 20472 t
Richard A. Hampe. Esq.
Hampe and McNicholas Paul McEachern, Esquire 35 Pleasant Street Matthew T. Brock, Esquire Concord, NH 03301 Shaines & McEachern 25 Maplewood Avenue Donald E. Chick P.O. Box 360 Town Manager Portsmouth, NH 03801 Town of Exeter 10 Front Street Cary W. Holmes, Esq.
Exeter, NH 03833 Holmes & Ells 47 Winnacunnet Road Brentwood Board of Selectmen Hampton, NH 03841 RFD Dalton Road Brentwood, EH 03633 Mr. Ed Thomas FEMA Region I Peter J. Mathews. Mayor 442 John W. McCormacP PO & Courthouse City Hall Boston, MA 02109 Newburyport, MA 01950 Stanley W. Knowles, Chairman Board of Selectmen P.O. Box 710 North Hampton, NH 03862
SBN-1013 ATTACHMENT 1 Response to FSAR Section 11.4 RAI 1.
The two-inch Waste Concentrates Tank (WS-TK-76) overflow line is located over Floor Drain, DR409.
The embedded three-inch drain line from DR409 to Waste Process Building Sump A is approximately 22 feet long.
Tank contents should normally be 5-6 weight percent solids per waste processing administrative guidelines.
The flow in the short drain line run coupled with the expected fluid concentration should not result in a drain line " freeze." Solids that might precipitate out within the drain line in the proposed scenario could be removed with flush water.
2.
Crystallizer distillate is discharged to the WLD System on high conductivity and to the waste test tanks on low conductivity.
Crystallizer bottoms are processed by the extruder / evaporator or by a contracted solidification vendor.
3.
The storage capacity of the area bounded by Lines A and B and Columns 5 and 3.5 (approximately) at El. 25 feet is approximately 450 to 650 drums. Although the storage volume is fixed, a storage capacity range is identified due to the following:
l o
Multiple types of solidification media o
Stacking arrangements and methods o
Drum and liner storage combination i
f 3
1 d
I 4.
The trash compactor exhausts directly to an adjacent building exhaust duct.
The exhaust is processed through the Waste Process Building's ventilation system, which is filtered and monitored prior to release through the plant vent stack.
5.
See Attachment 2 FSAR Page 11.4-1.
6.
The line associated with WS-V157 serves two functions.
It provides the capability to transfer the contents of the waste feed tanks (WS-TK-198A or B) to the waste concentrates tank (WS-TK-76), an unlikely event.
It also directs waste feed tanks and concentrates bottoms tank (WS-TK-200) overflows to the waste concentrates tank.
Tank overflows are also considered an unlikely event. Regardless, in both cases the line can be flushed.
The line from the chemicals drain treatment pump does not contain concentrated (from an evaporative process) material and therefore does not require heat tracing. Heat tracing is provided downstream of Check Valve WLD-V162 since this portion of the line Cc'ld Contain Concentrated J
material from the waste concentrates tank transfer line.
The steam generator blowdown bottoms transfer line is heat traced.
The heat trace designator is erroneously missing f rom Figure 11.4-1, Sheet 1.
2
f' The 10-inch recirculation line in the Crystallizer subsystem is not heat traced for two reasons:
- 1) system fluid temperature is maintained by steam heating in the crystallizer heater, and 2) should steam flow be lost,-the system has sufficient heat retention capability to allow the transfer of system contents to other tankage.
The capability also exists to dilute the system contents with flush water.
The line from the crystallizer drain pump to the waste feed tanks is used normally only to transfer flush water back to the waste feed tanks.
7.
The dose rate in the Asphalt Storage Building is expected to be less than 0.5 mr/hr.
8.
Systems containing radioactive slurries are provided with flushing capabilities.
9.
Compressed gases are not used to transport resins.
Seabrook Station utilizes cartridge-type filter, therefore filter sludges are not present.
10.
Tanks connected to the vent system have overflow lines to prevent liquids / solids from entering the vent lines.
Vapors entering the vent lines eventually condense and the condensate is trapped at the vent system trap station.
Components that operate above 210*F and atmospheric pressure are provided with vent gas coolers to prevent excessive moisture from entering the vent system.
i 3
11.
The area referenced in the response to Question No. 3 is designated as a storage area. As such, various types of wastes packages may be stored in this until such time as the accumulation of drums / liners prevents personnel entry into the area.
Packaged waste may be stored at various points in the area bounded by Lines A and D and Columns 5 and 6 at El. 25 feet. Additional storage requirements will be evaluated on a case basis.
Resultant storage arrangements will conform to regulatory requirements.
12.
See Attachment No. 2, FSAR Page 11.4-4.
13.
The Process Control Program (PCP) was transmitted to Mr. V. S. Noonan, April 14, 1986, Letter No. SBN-1003.
14.
As explained in the respense to Question No. 9, filter sludges are not present. Table 11.4-4 states that 30 filter cartridge changeouts are expected annually for two units.
The largest cartridge is approximately one cubic foot in volume, thus resulting in 30 cubic feet of filter cartridge waste per year.
I l
4
SBN-1013 ATTACHMENT 2 Revised Excerpts FSAR Section 11.4 l.
b!Cb8<
h(M SB l & 2 Amendment 56 FSAR November 1985 11.4 SOLID WASTE MANAGEMENT SYSTEM 11.4.1 Design Basis 11.4.1.1 Design Objective and Criteria i
A single solid waste management system is provided to serve two nuclear generating units.
l The solid waste management system processes waste liquida, spent resins and dry wastes for disposal off-site. The system is designed and operated to meet the limits for controlled releases of radioactive liquids from the site set forth in Seabrook Technical Specifications.
11-The solid waste management system is designed in accordance with 10 CFR 20; Regulatory Cuides
.143, 8.8, and 8.10; Standard Review Plan 11.4; Branch Technical Position
- and ANSI /ANS 55.1.
A generic topical report discussing the Waste Chem volume reduction and solidification system was accepted by the NRC on April 12, 1978. Consideration of operation, mainte-nance, and accident conditions have been factored into the system design to maintain radiation levels as low as reasonable achievable. Equipment layout and shielding are designed to limit radiation levels in areas accessible by the operator during a solidification operation to less than 15 mrem /hr, and in the radwaste control room levels are less than 2.5 mrem /hr. Handling, storage, and shipping of radioactive waste will be performed in conformance with 10 CFR 50, 61, and 71.
The containers used for solid waste storage and off-site shipment will be either 55 gallon drums, or 85 ft3 containers, and nominal 100 ft3 boxes.
These containers are designed to meet the appropriate requirements of 49 CFR 171-179 (Department of Transportation Radioactive Material Regulations), and 10 CFR 71 (Packaging of Radioactive Materials for Transport).
System design incorporates backup processing capability for the WL, BRS and SB evaporators via the liquid waste volume reduction subsystem.
A 10CFR61 wasteform qualification program is currently being conducted to demonstrate wasteform compliance to the NRC branch technical position on wasteform for Class B and C waste. The FSAR will be amended to reference the results of the wasteform qualification program when it is completed.
.'_ffiti : lly,4 process control plan (PCP) will be implemented to ensure compliance with 10CFR61 wasteform requirements.f d SMe bo *ial de)
Waste will be classified persuant to 10CFR61 classification requirements by use of isotopic inferral/ correlation techniques in conjunction with periodic calibration programs.
i 11.4-1
A%che.k 2 s'co#O s
z u se.e7 A" owb f. n.4 -4 (= na,A)
C.
Portable Solidification System Interface 1.
Wet waste storage tanks are limited to the inplant installation.
2.
Piping used to interf ace the plart's waste lines to the portable equipment will comply with the requirements of Regulatory Guide 1.143.
3.
The waste processing components of a portable system will be appropriately arranged in the araa bounded by lines A and D and columns 5 and 6 at elevation 25 feet of the Waste Processing Building.- The area is provided with floor drains and montrored building ventilation exhaust ducts. Spill control arrangements will be evaluated on a case basis, since they would be component and equipment arrangement specific.
k (Codh cLC.
4tM SB 1 & 2 Amendment 56 FSAR November 1985 Temporary on-site storage of waste, which has been solidified with cement by the alternate processing mode, of a minimum of thirty days is available in the waste processing building. Additional on-site storage will be provided as required.
The station services for the mobile solidification system are shared by both unite. The mobile system will have the capability 3
to solidify an input volume of at least 16,000 ft /yr of waste consisting primarily of spent resin and 12 wt% boric acid concen-3 trates, and to encapsulate and solidify 600 ft /yr of spent filter cartridges, contaminated and/or activated tools and other equipment.
The resin sluice tanks (2) can accommodate one year's supply for both units. Spent resin can also be dewatered with a mobile solidi-fication service.
7 Add TMSER7
'A" 11.4.1.2 System Inputs The solid waste management system has several input sources. The following subsections discuss these inputs on a yearly operational basis, including maintenance and anticipated transients. Tables 11.4-2 and 11.4-3 list the maximum and expected volumes and activity, respectively, for each source.
The bases and assumptions used in determining the solid waste activities for off-site shipment for each waste type are listed in Table 11.4-4.
The bases and assumptions used for determining the waste activities inside of each major subsystem component are presented in Subsection 12.2.
Radionuclide t
concentrations and volumes are consistent with reactor operating experience presented in NUREG/CR-0144, ORNL-4924, and NUREC/CR-1759. Process flow diagrams for the solid waste management system are shown in Figure 11.4-3 (Sheets 1 & 2).
P&ID's for the system are given by Figures 11.4-1 (Sheets 1 thru 8) and 11.4-2.
Layouts identifing packaging, shipping, and storage areas are given by Figures 1.2-22 thru 1.2-30.
a.
Dry Active Wastes Dry active wastes are classified into two categories. The two categories are (1) non-compactible and (2) compactible. Examples of non-compactible wastes would include small items such as used handtools which cannot be economically decontaminated, electrical connectors, wood, et. al. from contaminated areas. Examples of compactible wastes would include paper, polyethylene, tape, anti-contamination clothing, gloves, and shoe covers that are contami-nated and/or beyond repair. The activity concentrations for off-site shipment, after processing, are listed in Table 11.4-5 assuming twice the expected waste generation volumes as the maximum.
b.
Spent Demineralizer Resins The resin sluice tanks, located in the WPB at elevation (-)31' provide the collection point for spent resins. The spent resin transfer pump takes suction on either of these tanks and transfers su 11.4-4