ML20154A552
| ML20154A552 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 09/18/1998 |
| From: | Feigenbaum T NORTH ATLANTIC ENERGY SERVICE CORP. (NAESCO) |
| To: | Devillars J, Puleo S ENVIRONMENTAL PROTECTION AGENCY |
| References | |
| AR#97001236-03, AR#97001236-3, NH0020338, NH20338, NYE-98012, NYE-98021, NYE-98031, NUDOCS 9810020341 | |
| Download: ML20154A552 (6) | |
Text
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""%- North Atlantic Energy Service Corporation North Po ne=3*
Seabrook, Nil 03874 Atlaritic (60314749521 The Northeast Utilities System l
September 18,1998 i NPDES Permit NH0020338 l
NYE-98031 i
Ref: AR#97001236-03 NYE-98012 - 1 NYE-98021 i United States Environmental Protection Agency Region I Attn.: John P. DeVillars, Regional Administrator c/o Shelly B. Puleo, Environmental Protection Specialist Municipal Assistance Unit Office of Ecosystem Protection !
John F. Kennedy Federal Building Boston, Massachusetts 02203-0001 Seabrook Station '
Second Sunclement to NPDES Permit Renewal Application , j l
North Atlantic Energy Service Corporation (NAESCO) hereby submits, pursuant to 40 CFR ^!
122.21(d), a second supplement to its April 23, 1998', application to renew National Pollutant Discharge Elimination System (NPDES) Permit No. NH0020338 for Seabrook Station, a nuclear electric generating facility located in Seabrook, NH. This supplement provides additional l information related to proposed Outfall 025C (Waste Holdup Sump). It consists of the attached l replacement page to the application. Additional background discussion is provided below.
Seabrook Station's previous and current NPDES Permits, issued in 1985 and 1993 respectively, combined multiple processes into Outfall 025. It includes steam generator blowdown, steam generator blowdown distillate, Waste Test Tank and Recovery Test Tank effluent, and Waste
. Holdup Sump effluent. Seabrook Station's 1985 NPDES Permit required that pH from this outfall be maintained between 6 and 9. At that time, two mixed bed demineralizers were used to treat steam generator blowdown for return to the secondary plant system. Sodium hydroxide was j used to reactivate the anion resin beads within the mixed bed demineralizer and sulfuric acid to /}
l North Atlantic Energy Service Corporation letter NYE-98012, dated April 23,1998," NPDES Permit Renewal Application" Mr. Ted C. Feigenbaum (North Atlantic) to Mr. John P. DeVillars
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9810020341 900918 PDR P ADOCK 05000443 pg
U.S. Environmental Protection Agency NYE-98031/ Page 2 reactivate the cation resin beads. The mixed bed demineralizer bed regeneration effluent was collected in the Waste Holdup Sump. Before discharge to the Circulating Water System (Outfall 001), the sump was sunpled and neutralized if necessary.
The pH limits (and consequently the need for pH sampling and neutralization) for Outfall 025 were removed in the 1993 renewal permit. In the 1991 request for removal of pH limits on 2
Outfall 025 , North Atlantic pointed out that the normal steam generator blowdown pH, ranging from 8.8 to 9.2 and as high as 9.6 in order to minimize steam generator corrosion and sludge buildup, could exceed these limits. The request also noted that there was a downstream monitoring point that ensured applicable water quality standards were met. In 1994, a lead cation bed was installed to supplement the mixcd bed demineralizers and increase the effectiveness of the demineralization process. Sulfuric acid is used to reactivate the cation bed resin beds. When the cation bed is reactivated, the effluent in the sump is acidic with a pH less than 2.
A point not stated in the 1991 request that applies to the discharge of both the cation and mixed i bed demineralizer reactivation effluent from the Waste Holdup Sump is that the buffering action of the seawater ensures that the pH is well within permit limits by the time it reaches the discharge transition structure (Outfall 001). The sump can be discharged at a maximum rate of ;
75 gpm when there is maximum combined Service Water and Circulating Water flow through ;
the discharge transition structure of about 500,000 gpm. The maximum allowed Waste Holdup l Sump flow is reduced proportionately for reduced Service Water / Circulating Water flow. Prior !
to a recent discharge, the sump was sampled and determined to have a pH of 1.3. During the j discharge, Outfall 001 was sampled at the discharge transition structure and found to have a pH
- of 7!9, within the required range and a typical value when there is no discharge from the Waste Holdup Sump. North Atlantic intends to collect another confirmatory sample at Outfall 001 ,,
during the next discharge of cation bed reactivation effluent. Thus all water quality standards continue to be met when Seabrook Station is reactivating either the mixed bed demineralizers or the cation bed demineralizer.
If you have any questions, please call John Hart at (603) 773 7762.
Very truly yours, NORTH A NTIC EN GY SERVICE CORP.
~
ro A &
d 'C. Fejfe'nbYum . /
Executive Vice 14e ent and Chief Nuclear Officer
- North Atlantic Energy Service Corporation letter NYE-91009, dated April 11,1991," Amended NPDES Permit Renewal Application" Mr. Ted C. Feigenbaum (North Atlantic) to Mr. Edward K. McSweeney
U.S. Environmental Protection Agency NYE-98031/ Page 3
.cc:
Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Mr. J. T. Harrison, Project Manager Project Directorate I-3 Division of Reactor Projects -I/II Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Mr. Hubert J. Miller Regional Administrator - Region i U.S. Nuclear Regulatory Commission 475 Allendale Road -
King of Prussia, PA 19406-1415 Mr. Georg C. Berlandi, P.E.
]
Sanitary Engineer Surface Water Quality Bureau j NH Department of Environmental Services '
- Water Supply and Pollution Control Div. < j
- 64 Nprth Main Street,3rd Floor '
j Concord NH 03301 Marca A. Brown Thunberg, Attorney
'. Federal Consistency Coordinator
- NH Coastal Program l
- Office of State Planning State of New Hampshire .
21/2 Beacon Street -
Concord, NH 03301-4497 Mr. Jeffrey Andrews
. NH Dept. Of Environmental Services-Water Division 6 Hazen Drive Concord,NH 03302
U.S. Environmental Protection Agency NYE-98031/ Page 4 Certification pursuant to 40 CFR 122.22(d)
I certify under penalty oflaw that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete.' I am aware that there are significant penalties for submitting false infonnation, including the possibil'tytflitie~and'i prisonment for knowing violations.
c MV brueef. DrawMidge
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/
Date/
Director - Services STATE OF NEW HAMPSHIRE Rockingham, ss.
Then personally appeared before me, the above-named Bruce L. Drawbridge,
- Direbtor- Services, North Atlantic Energy Service Corporation, that he is duly authorized to execute and file the foregoing information in the name and on the behalf of North Atlantic ,
Energy Service Corporation and that the statements therein are true to the best of his knowledge
, and belief.
, %a/b" 9MM Susan J. Mes(er, Notary Public Date My Commission Expires: December 22,1998 ,
4 e
9 e
ENCLOSURE TO NYE-98031 W
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a g 9 e-e
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' l 174
, (Rev. 01)
Support equipment is needed to regenerate the resins in the Steam Generator Blowdown System recovery subsystem demineralizers. The basic regeneration equipment consists of an Acid Skid, a Caustic Skid and the Waste Holdup Sump.
Sulfuric acid is used to reactivate the Cation (positive ion) resin beads within the mixed-bed demineralizers and the lead cation bed demineralizer. Sodium hydroxide is used to reactivate the Anion (negative ion) resin beads within the mixed-bed demineralizers. Following a cation bed regeneration, the contents of the sump may be acidic with pilless than 2. The Waste lloldup Sump transfers liquids to the Waste Liquid System for direct discharge to the l Circulating Water System (Outfall 001) or to either of the Chemical Drain Treatment Tanks which are directed to I the Waste Test Tanks (Outfall 025D). Manual startup of this process is needed to initiate the regeneration cycle.
After the process is started the remainder is automatically sequenced. The entire regeneration process can be manually controlled. Interlocks ensure that only one mixed-bed demineralizer is regenerated at a time. Interlocks will also stop the regeneration cycle if there is not enough acid or caustic available to complete a cycle, or if the l
l level in the Waste Holdup Sump is above a setpoint level.
The Steam Generator Waste Holdup Sump is a 30,000 gallon sump designed to contain fluids from the regeneration of the demineralizer beds. It is a concrete sump lined with Plasite* liner. The sump also captures some of the floor drains from the demineralizer room. The sump is normally directed to the Waste Liquid System for direct discharge '
to the Circulating Water System. It is sampled onceprior to or during batch dischargefor oil and grease and total ,
suspended solids. The relatively low flow volume of the discharge and the buffering action of the seawater ensures that all pil limits at Outfall 001 are met. The sump may also be discharged to the Chemical Drain Treatment Tanks which are directed to the Waste Test Tanks. There is a recirculation system on the sump which )
allows for mixing and sampling prior to discharge. This recirculation system also contains components which I remove larger suspended solids. The maximum discharge rate for the Waste Holdup Sump is 75 gpm.
Alternate tiaths for this discharge:
l e Waste Test Tank (s)(025D)
- Turbine Building Sump , i I
e Storm Drains (if no beta / gamma radioactivity detected) ,
e Turbine Building Auxiliary Sump -(holding only - no discharge)
Potential chemicals in discharge:
- Any chemicals listed in outfalls Steam Generator Blowdown (025A) and Steam Generator Blowdown demineralizer Rinses (025B)
Note: Some of the chemicals listed below are also listed in outfalls 025A and 025B. They are listed below because they are also directly discharged into this outfall.
- Ammonia / Ammonium hydroxide - Secondary chemical additive (from thermal decomposition of hydrazine),
Primary Component Cooling water drainage, Steam Generator drainage, sample system waste, trace quantities from silica analyzer cleaning
- Methoxypropylamine - Secondary chemical additive, Steam Generator drainage, sample system waste
- Hydrazine Secondary chemical additive, Steam Generator drainage, Primary Component Cooling Water System drainage, sample system waste
- Suspended solids - particulates from all potential inputs e Ethanolamine - Secondary chemical additive, Steam Generator drainage, sample system waste
- Total Residual Chlorine - Ocean cooling water system leakage and drainage, fire protection water
- Diisopropylamine - trace quantities from sodium analyzer drains