ML18100B030
| ML18100B030 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 04/18/1994 |
| From: | Thomson F Public Service Enterprise Group |
| To: | Mathis S NEW JERSEY, STATE OF |
| References | |
| NLR-E94074, NUDOCS 9404260102 | |
| Download: ML18100B030 (2) | |
Text
Public $er'vice Electric and Gas Company P.O. Box 236 Hancocks Bridge, New Jersey 08038 Nuclear Department CERTIFIED MAIL RETURN RECEIPT REQUESTED ARTICLE NUMBER: Z 691 525 088 Mr. Steve Mathis APR 1B1994 NLR-E94074 NJ Department of Environmental Protection and Energy Off ice of Enforcement Policy Southern Bureau of Water and Hazardous Waste Enforcement 20 E. Clementon Road Gibbsboro, NJ 08026 Dear Mr. Mathis SALEM GENERATING STATION NJPDES PERMIT NO. NJ0005622 DISCHARGE OF HYDRAZINE CASE NO. 94-4-14-1052-17 On April 14, 1994 Public Service Electric and Gas (PSE&G) Company reported a discharge of hydrazine from the Non-Radiological Liquid Waste Disposal System (NRLWDS) at the Salem Generating Station.
The NRLWDS is an internal monitoring point, DSN 48C, which ultimately discharges to the Delaware River through the circulating water system outfalls under NJPDES Permit No.
NJ0005622.
The discharge was reported to the NJDEPE Hotline and was assigned Case No. 94-4-14-1052-17 by Operator 24.
The NRLWDS provides treatment through clarification, metals precipitation and utilizes break-point chlorination for ammonia and hydrazine removal.
The system is currently* operated in a batch mode with influent samples analyzed for ammonia and hydrazine to determine treatment requirements.
In order to discharge, there may be no detectable hydrazine in the effluent.
The NRLWDS receives waste from various sources including the steam generator blowdown tanks.
During normal plant operations, the waste from the blowdown tanks normally contains a small amount of hydrazine which is easily removed by maintaining a chlorine residual in the equalization basin.
However, during plant outages chemistry specifications require additional hydrazine to be added to the steam generators.
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On April 13, while in an outage condition, a steam generator from Salem Unit 1 was drained to the NRLWDS.
The concentration of hydrazine in this generator was approximately 7500 ppb.
This waste was treated with sodium hypochlorite to remove the hydrazine.
The equalization basin was satisfactorily sampled and the NRLWDS was placed into discharge at 2215 hours0.0256 days <br />0.615 hours <br />0.00366 weeks <br />8.428075e-4 months <br />.
On April 14, at approximately 0100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br />, Chemistry personnel noticed that a hydrazine monitor in the influent equalization basin. indicated the presence of hydrazine.
The discharge from the NRLWDS was immediately secured.
Confirmatory samples indicated that approximately 150,000 gallons of water containing a concentration of approximately 50 ppb hydrazine had been discharged.
The total volume of hydrazine discharged was approximately one ounce.
The total weight of hydrazine discharged was less than one (1) pound and as such was not reportable under the CERCLA Regulations.
The hydrazine that was discharged resulted from a residual amount of the steam generator waste that re:rrt-.ined in the waste line being added to the equalization basin.
The residual chlorine in the equalization basin was not enough to completely react with the concentration of hydrazine present resulting in a small amount of hydrazine being carried through the system and eventually discharged.
In order to prevent reoccurrence of this incident, Chemistry is expanding system operator oversight to include additional monitoring of plant evolutions that contain high concentrations of hydrazine.
This discharge has not endangered nor significantly impacted public health or the environment.
If you have any additional comments or questions regarding this matter, please contact Mr. David Hurka at (609) 339-1275.
Sincerely,
_fi7~-~/
F. X. Thomson, Jr.
Manager -
Licensing and Regulation c
Assistant Director of Enforcement NJ Department of Environmental Protection and Energy 401 East State Street Trenton, NJ 08625-0029 U. S. Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555