ML061160419

E-mail from T. Jones of Entergy to M. Cox of USNRC, Regarding Draft Stakeholders Presentation

ML061160419
Person / Time
Site:	Indian Point
Issue date:	11/02/2005
From:	Jones T Entergy Nuclear Operations
To:	Cox M Entergy Nuclear Operations, NRC Region 1
References
FOIA/PA-2006-0081
Download: ML061160419 (31)

Text

.Page 1 From: "Jones, T. R." <tjones2©entergy.com>

To: "Cox, Mark R" <mcox90Oentergy.com>

Date: 11/2/05 1:35PM

Subject:

Draft Stakeholders Presentation Information in this record was deleted in accordance witbt4 e Freedom of IntfomatoR Act, exepik I FOI.>r I

.. - -- 1------ rage l Mail Envelope Properties (43C5123D.BE2: 12: 11234)

Subject:

Draft Stakeholders Presentation Creation Date: 11/2/05 1:35PM From: "Jones, T. R." <tjones2@entergy.com>

Created By: tjones2 @entergy.com Recipients entergy.com mcoK90 (Mark R Cox)

Post Office Route entergy.com Files Size Date & Time SFP brief 10 03 05 rev 8.ppt 2493952 Header 529 Options Expiration Date: None Priority: Standard Reply Requested: No Return Notification: None Concealed

Subject:

No Security: Standard

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-_ - _Page 5 Overview of Spent Fuel Pool Issue Two hairline shrinkage cracks discovered on south wall of spent fuel pool during excavation for new crane Moisture in the cracks is along a 3' and 9' long section Immediate actions included an analysis of structural integrity of the spent fuel pool, collection of leakage and radiological sampling of moisture in crack and surrounding earth (inside fuel building) 5

. ).......V.0...._uVPage E In-depth Investigation -

Bounding the Problem Conducting root cause analysis - a structured, methodical investigation

- What is the source of the moisture?

Is it coming from the spent fuel pool or on-going excavation or is it from previous operations?

- How much water is leaking?

- Where is the water going?

- How can we capture the water?

- Does the water contain radioactivity?

- What is the extent of the leakage?

- What actions are need to confirm the condition of the spent fuel pool and liner?

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s J.J betaV U. vvPage 7 In-depth Investigation-Bounding Mhe Problem cont~d Key Actions Taken

- Performed structural analysis of spent fuel pool

- Sampled water from cracks for radioactivity

- Took soil samples nearby to analyze for radioactivity

- Installed collection system to capture water

- Brought in experts in hydrology and structural engineering

- Sampled existing site monitoring wells 7

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IP2 Spent Fuel Pool Area Containment SFP

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Moist crack Dry Roll up door 0  : / / . cracks  : /

FSB loading bay .

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• 0 - . - m Artist rending of spent fuel pool wall For Illustration only 9

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I- G L IOI UJ I-:V o.pp- - -- Page 12 Investigation Key Dates Excavation in Spent Fuel Building-floor Shrinkage crack noted in SFB south wa~tructural Integrity of SFP verified Aug. 22 Samples taken for radiological analysis. No radioactivity detected Begin monitoring and sampling program

? Large area surface samples show trace amounts of radioactivity Sept. 1 t? Installed cover and drain collection system

[ to capture water Sept. 6-9 Made core bores at crack location; Collected liquid and soil samples for SFB :: Spent fuel building tritium analysis 12

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-. -ot? ra Investigation Key Dates Excavation In Spent Fuel Building Floor Monitoring and sampling program tD Low levels of radioactivity founFl1§in assessing site hydrology, contacting experts Liquid and soil samples near SFB Sept. 12-15 NRC Radiation Protection inspectors on site ef NRC announces special Inspec t ion Sept. 2 0 Entergy Issues press release and notifies stakeholders Additional soil samples from truck lbay In SFB show presence of Sept. 1912i"u E Samples taken from monitoring wells on site SFB -- Spent fuel building Sept. 28-29 13

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t-age 14 A Investigation Key Dates Excavation in Spent Fuel Building Floor Monitoring and sampling program .

First round of well samples results; one well tests positive for tritium; three uzLIUIb all; 11UC3UxV1=

Additional samples taken from wells around IP3 Oct. 5-12 I Tritium detected in wells near 1P3 Oct. 19 ___

T Spent Fuel Pool liner inspection Oct 27- Nov. 3 SFB Spent fuel building S 14

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10, Current Status

• Spent Fuel Pool liner inspection about 1/3 complete

- A couple of anomalies identified

- Evaluating repair options

. Permanent leak collection modification fabrication begun

• Drill new monitoring wells near Fuel Storage Building and Unit 2 turbine

- See map for proposed locations

- Drilling scheduled to begin Nov. 8

• Update ground water model for site 15

Dry I'll- S @ V'V.V1/2*'t AMY*r W-'.Y"I Solution Strategy

• Complete pool liner inspection; repair as appropriate

• Install permanent collection modification

• Update hydrology study

• Design monitoring and mitigation system for groundwater 16

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What is Tritium?

• Tritium is a radioactive form of Hydrogen

• Reacts in the environment just like stable hydrogen to form water

. Used in commercial products such as watch dials and exit lights because it can interact with a phosphor to emit light continuously

• Tritium emits a low energy Beta particle

• It is produced in the atmosphere from cosmic rays and in power and production reactors

'18

Tritium Sample Results Tritium Description Concentration Comments (microcuries per milliliter) The hiyghit ost'iity Monitoring Well in detected in any onsite Transformer yard (0.00021) well 10 X drinking water 210,000 pCVmi standard Monitoring Wells (2) located No Detectable south and adjacent to the IP2 Activity above turbine building background l (0.00002) Permissible level In EPA Drinking Water Standard 20,000 pCImi drinking water Maximum level detected in l the 5 additional sample 0.0000016 l0x less than drinking points near Unit-3 1600 pCi/ml water standard Background tritium levels in (0.0000001 to U.S. drinking water 0.0000004) From USEPA Report 100 -400 pCi/ml 42, 1985. 19

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What do the Numbers Mean?

• NRC regulations allow smalls amount of radioactivity to be discharged from nuclear power plants

• Discharges are monitored and reported monthly and summarized in annual reports

• Indian Point has been consistently < .1%of our allowable limits 20

Dose Limits from Discharges Federal Limits IPEC 2005 YTD Liquid 3.0 mrem/yr < .1%

Effluents Airborne 10 mrem/yr < .1%

Effluents Total from all 25 mrem/yr < .1%

sources Background 360 mrem/yr Nee2 radiation results 21

-. 7 _ Ah..-.--.-- .. _. . Page 22 Preliminary Dose Estimate

• Using the highest level of tritium activity and assuming 10 liters/day water consumption yields a conservative estimate of < .01 mr/yr

• Note: there are no drinking water wells on site and the estimate is a bounding calculation only 22

Dose Comparison to Background l Indian Point Effluent Dose (mrem) - 2005 I. .-

This is from the effluent report 0.07 0.06 0.05 I -.. .

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• Interconnecting set of pools

• 160 spent fuel assemblies stored in the "West" pool

• Know leaks in the pool system dating back to early 1990's

- Average of 25 gals/day which is collected, monitored, processed and released as permitted by our license.

• Project underway to transfer Unit 1 fuel to dry casks in order to stop pool leakage

• Foundation drain system collects water from pools 24

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vM unit I Dry Cask( Project

• Unit I fuel will be transferred to dry casks, starting in 2007

• Fuel assemblies are being inspected as part of the DCS project

- Inspections began in 2003

- Water level in "West" pool was raised 8' to facilitate final inspections in September '05

- When water level was raised, water moved between the pools as expected.

- No increase in leakage from pools to the foundation drains/environment has been observed 25

Current Status of Unit I Pool

• Where are we now in the process?

- Inspections needed to complete engineering analysis for final fuel move will be completed in November

• All pools will be drained after fuel is transferred to dry casks thereby stopping the leak 27

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TURIETURBINEI TURBINEA PLANT ENTRANCE NEM 29

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Investigation Results to Date Early radiological samples (late August) near crack locations show no detectable activity Established on-going sampling and monitoring program Structural analysis confirmed integrity of spent fuel pool Subsequent samples (Sept. 1) indicated low levels of radioactivity Tested existing wells on site for radioactivity 31