ML12157A183

Attachment 10 to GNRO-2012/00039 - Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit - Hydrology Patton - Attachment P Labeled Thermal Monitoring Procedural Protocols.

ML12157A183
Person / Time
Site:	Grand Gulf
Issue date:	05/23/2012
From:	Entergy Operations
To:	Office of Nuclear Reactor Regulation
References
GNRO-2012/00039
Download: ML12157A183 (8)

Text

Attachment 10 to GNRO-2012/00039 Attachment 10 to GNRO-2012/00039 Entergy Nuclear Grand Gulf Nuclear Station License Renewal Environmental Audit-Hydrology Patton -Attachment P labeled"Thermal Monitoring Procedural Protocols" Attachment P Thermal Monitoring Procedural Protocols GRAND GULF NUCLEAR STATION ENVIRONMENTAL INSTRUCTION 08-S-09-4 Revision:

11 Attachment III Page 1 of 6 THERMAL MONITORING REQUIREMENTS I. MONITORING REQUIREMENTS:

a). Monitoring is performed during discharge of the heated plant effluent in accordance with Part III, Section D.3., of the NPDES Permit.b). River stages are monitored and documented by chemistry.

If a river stage exceeds a Permit monitoring requirement, notify the Chemistry Superintendent, or designee, and perform monitoring.

c). Documentation of river stage is kept with NPDES data file for reporting to and inspection by MDEQ.d). Measurements are taken at the water surface and 5 feet subsurface if possible.

The detector may float on the water surface for the surface measurement.

Suspend the detector below the surface for the subsurface measurements.

[M&TE maintains a specially designed device with an extended stainless steel probe for subsurface river measurements.

If this is not available an improvised device may be used.]e). At each location, allow the thermometer to stabilize before recording measurement.

II. SAFETY PRECAUTIONS:

a). Complete the operational checklist for boat operation (attached) to ensure it is functioning safely prior to entering the Mississippi River.b). A pre-job brief must be performed before measurements commence.c). Lifejackets must be worn by all GGNS boat occupants and contractors under Chemistry oversight even if they provide their own vessel.III. MONITORING LOCATIONS:

a). Upriver (Point 1): Approximately 400 feet North of the mouth of the barge slip and not more than 60 feet from the Eastern shoreline, in a depth of water approximately 5 feet.b). Discharge Outlet: The plant discharge pipe opening. In periods of high water this may be taken in the vicinity of the discharge plume. This may be indicated by an area of turbulent water near the South shoreline of the barge slip. In periods of low water when a 5' depth measurement is impractical, a measurement may be taken directly from the pipe plume. The location should be noted on the data sheet and an N/A entered in the discharge outlet temperature 5 ft. blank.c). Barge Slip Outlet: The opening or "mouth" of the barge slip where waters enter into the Mississippi River. If subsurface sample must be collected at less than 5 feet, note the approximate depth on the data sheet.d). Downriver (Point 7): Approximately 100 feet South of the mouth of the barge slip in the mixing zone, approximately not more than 60 feet from the Eastern shoreline, in a depth of water approximately 5 feet.J:\ADMSRVS\TECHPUB\REVISION\8\8S094.DOC GRAND GULF NUCLEAR STATION ENVIRONMENTAL INSTRUCTION 08-S-09-4 Revision:

11 Attachment III Page 2 of 6 THERMAL MONITORING RZQUIRIZONTS e). Ambient Air Temperature:

This may be a stabilized measurement using a calibrated temperature device or determined from meteorological tower data.f). Mississippi River Level: Daily river stages are obtained by contacting the U.S. Army Corps of Engineers, U.S. Weather Service or similar information source.g). Outfall 001 Temperature:

Data is an instantaneous measurement from PDS or the strip chart recorder located at the 001 Outfall.h). Receiving Water: Waters outside of the mouth of the barge slip. These include the mixing zone as well as the Mississippi River.IV. RECORDS, a). Record measurements on a copy of the attached data form, or similar.b). On completion of measurements forward to Chemistry Superintendent, or designee, for review and signature.

c). Forward completed forms to the NPDES Specialist.

This becomes part of the NPDES data file for reporting and inspection by MDEQ.V. TABLES AND FORKS: The following items are attached: Page 3 Discharge Path Locations Page 4 River Measurement Locations Page 5 Boat Operational Checklist Page 6 Thermal Monitoring Data Sheet J:\ADMSRVS\TECHPUB\REVISION\8\8S094.DOC GRAND GULF NUCLEAR STATION ENVIRONMENTAL INSTRUCTION 08-S-09-4 Revision:

11 Attachment III Page 3 of 6 THERMAL MONITORING REQUIREMENTS DISCHARGE PATH LOCATIONS A Installed temperature recorder at Outfall 001 B Discharge Outlet C Barge Slip Outlet OUTFALL 001 DISCHARGE STRUCTURE BARGE SLIP C J:\ADMSRVS\TECH_,PUB\REVISION\8\8S094.DOC GRAND GULF NUCLEAR STATION ENVIRONMENTAL INSTRUCTION 08-S-09-4 Revision:

11 Attachment III Page 4 of 6'I THERMAL MONITORING REQUIREMENTS RIVER MEASUREMENT LOCATIONS 400 1 2 3 Discharge Pipe 100'pop 4 5 6 7 8 River1ow IIeIL Directio 9 10 11 12 13 14 ill-4 I I I J:\ADMSRVS\TECHPUB\REVISION\8\8S094.DOC-NORTH J:\ADM_SRVS\TECHPUB\REVISION\8\8S094 .DOC GRAND GULF NUCLEAR STATION ENVIRONMENTAL INSTRUCTION 08-S-09-4 Revision:

11 Attachment III Page 5 of 6 THERMAL MONITORING RRQUIRZNNTS BOAT OPERATIONAL CHECKLIST Visual Inspection of Hull for Damage Gas Tank greater than 1/4 full (Unleaded gasoline >89 octane level recommended.)

Battery charged Sufficient amount of life jackets provided_Fire Extinguisher on Board and Charged Two-Way Radio Communication established Paddle provided Boat plug in place Kill switch activated (Do not crank engine when out of water)**Trailer tires aired up Winch rope serviceable Trailer hitch Operational Outboard motor lubricant reservoir

> 1/2 full of outboard lubricant/oil.

Checked by: Initials /Date Reviewed by: Initials /Date**When finished, disconnect fuel line with engine running to use residual fuel and avoid gumming engine.J:\ADMSRVS\TECHPUB\REVISION\8\8S094.DOC GRAND GULF NUCLEAR STATION N.ENVIRONMENTAL INSTRUCTION 08-S-09-4 Revision:

11 Attachment III Page 6 of 6 THERMAL MONITORING REQUIREMENTS THERMAL MONITORING DATA SHEET I. Date Performed II. Upriver Temperature (Point 1)III. Discharge Outlet Temperature(Note 1)IV. Barge Slip Outlet Temperature(Note 2)V. Downriver Temperature (Point 7)(Receiving Water)Surface 5 ft Surface 5 ft Surface 5 ft Surface 5 ft 0C 0C 0C oc oC CC oC CC OC VI.VII.Ambient Air Temperature River Level at Vicksburg ft CC VIII. Outfall 001 Recorder Temperature NOTE: A. Any temperature measurement in RECEIVING WATER which is equal to or greater than UPRIVER TEMPERATURE

+2.8 0 C must be reported to the Chemistry Superintendent.

B. Any temperature measurement in RECEIVING WATER which exceeds 32.2 0 C must be reported to the Chemistry Superintendent.

Prepared by Reviewed by Signature/Date Signature/Date (Note 1) If the 5 ft. sample is impractical, note location of measurement and N/A the 5 ft blank. (See Page 1, III. b)(Note 2) If subsurface measurement depth is less than 5 ft. note the approximate depth on the data sheet (See Page 1, III. c)J:\ADMSRVS\TECHPUB\REVISION\8\8S094.DOC