ML090540550

Summary - Draining Unit 1 Pools

ML090540550
Person / Time
Site:	Indian Point
Issue date:	09/30/2008
From:	Sandlike S - No Known Affiliation
To:	NRC Region 1
References
Download: ML090540550 (10)

Text

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No: 0-CY-1840 Rev: 1 ODCM IMPACT REVIEWS Page 9 of 10 ATTACHMENT I Reference Draining Unit 1 Pools -

per EC-7981 to the WDST line ODCM IMPACT REVIEW FORM Part 1 OIR No:

2008-00 4 Will proposed change in procedurelprocesslactivityloperationlstructure Yes No MONITORING INSTRUMENTATION Result in a change to Liquid or Airborne instrumentation listed in RECS?

Yes Require additional monitoring, other than that listed in RECS?

Challenge the ability to complete surveillance requirements of the RECS?

RADIOACTIVE LIQUID OR AIRBORNE EFFLUENTS Alter the concentration of liquid effluents in the discharge canal?

Alter the rate of release of gaseous effluents?

Alter the quarterly or annual effluent total releases from either I PEC unit?

Yes Alter the liquid or gaseous waste sampling and analysis program?

Result in a change to the administrative (reporting) requirements of the RECS?

Challenge the ability to complete surveillance requirements of the RECS?

PROCESS CONTROL PROGRAM Inhibit or alter the solid or liquid radwaste treatment systems?

Alter RCS chemistry or RCS radionuclide distribution?

Inhibit or alter the use of gas decay tanks or airborne cleanup systems?

No Alter the description of the solid waste control or surveillance program?

Alter the 31-day dose projection or the criteria for use of cleanup systems?

ENVIRONMENTAL MONITORING PROGRAM OR LAND USE CENSUS Reduce the ability to obtain required samples (eg, de-energize REMP equipment)?'

Result in a change to the REMP, as defined in the RECS ?

Result in a change to critical receptors, nearest resident, or site boundary?

No Result in a change to the interlaboratory comparison program?

Challenge the ability to complete surveillance requirements of the RECS?

TANK CURIE LIMITS FROM RECS Challenge the RECS curie limit in unprotected outdoor liquid holdup tanks?

Challenge the conservative ODCM curie limit in gaseous storage tanks?

No Challenge the ability to complete surveillance requirements of the RECS?

RADIATION MONITOR SETPOINTS Require alteration of setpoints of bases of setpoints for effluent monitors?

Alter the digital or analog range of installed process radiation monitors?

No Alter the operability criteria of required process radiation monitors?

RELEASE PATHWAYS Result in a new (unanalyzed) or modified airborne or liquid effluent pathway?

Yes Challenge the ability to obtain or analyze samples for a required pathway?

SITE EFFLUENTS Alter established methods of shared site limits?

If the answer to any of the above is YES, then P.

2 shall be completed.

Steve Sandike 6/13/2008 Print Name Initial Date

No: O-CY-1840 Rev: I ODCM IMPACT REVIEWS Page 10 of 10 I]

ATTACHMENT 2 ODCM IMPACT REVIEW FORM, Part 2 Page 1 of 2 Subject Draining Unit 1 Pools -

OIR or Reference per EC-7981 to the WDST line Number 2008- 004 I. PURPOSE AND SCOPE This evaluation is performed to determine the ODCM / effluent / environmental impact of a one-time operation of draining the Unit 1 pools per EC-7981.

I!. DESCRIPTION EC-7981 involves draining the Unit I pools after the dry cask project has completed removing the fuel. The pools are then to be drained to reduce environmental input. The west pool will also have the silt cleaned/removed. To facilitate this one-time operation, a demin skid (identified as the 24x7 skid) will be reconfigured to include extra filtration and removal processes. Additional treatment capacity will be available (mixed bed demin and granular activated charcoal). Water will then be directed to the Utility Tunnel, and eventually into the WDST effluent line downstream of the tanks.

Composite samplers will be installed before and after the additional cleanup system (set up by Energy Solutions), on the outlet of the 24x7 skid. A calibrated flow monitoring device will be applied to monitor effluent rate, per existing generic ODCM requirements. Other discharge systems will be generally unaffected, with some isolated and tagged, The EC discusses how to, if needed, temporarily suspend this one-time activity should the isolated systems be required for operation.

Il. REVIEW AND ANALYSIS A one-time, temporary continuous release pathway of pool water with trace levels of contamination is established via EC-7981. The pools contain demineralized pure water, slightly contaminated from old fuel assemblies that will. have been already removed. The mod sets up a release pathway that involves continuous cleanup and monitoring prior to discharging into an approved pathway. Because this pathway is temporary, standard ODCM requirements will be applied to this release, identical to those encountered in a typical ODCM-governed pathway, such as the Unit 1 North Curtain Drain pathway (continuous composite samplers and a flow rate measuring device). These requirements are consistent with existing ODCM controls and NUREG 1301.

Work Order 00123484, Task 10, will include direction and periodicity of sampling at the two compositors (among other instruction). Chemistry will obtain multiple samples during this evolution from the flow-proportional compositors applied in the system. Each will be analyzed by.gamma spectroscopy. Further composites will be generated for H-3 and other beta analyses (some of which will be performed offsite) to completely characterize this one-time release.

Existing procedures 1-RP-RWM-913 and 2-SOP-5.1.5 will be applied to manage the discharge and permit the release (through Chemistry's interface with Operations).

No: 0-CY-1840ý Rev: 1 ODCM IMPACT REVIEWS Page 10 of 10 ATTACHMENT 2 ODCM IMPACT REVIEW FORM, Part 2 2008- 004 Page 2 of 2 IV.

SUMMARY

AND CONCLUSIONS The ODCM and its bases documents require a means to adequately monitor (sample) discharges through approved pathways. While this temporary pool draining is directed to the WDST line, the means with which to analyze the radioactive content of the water will be the dual compositors on the inlet and outlet of a final cleanup skid. These compositors are much more conservative than simple grab sampling and will ensure proper quantification, similar to the NCD pathway.

The ODCM also requires flow monitoring, to ensure the release is properly quantified and controlled.

In order to meet this criteria, a calibrated flow monitoring device will be installed on the outlet of the final cleanup skid. Concentration data will be applied with flow rate or total volume determination to complete the required ODCM effluent calculations.

The source term of the water in the pools has been and will remain isolated and properly quantified before the release is initiated. A bounding calculation has determined that ALL the activity in the pool, if releases, will NOT approach any effluent limit. The controls and procedures set up for this evolution ensure this one-time discharge is conducted within the requirements of the ODCM, as well as verify acceptable levels of ALARA controls.

It is expected that this 30-45 gpm continuous draining will take 8 to 12 days. The continuous monitoring will remain in effect during the entire evolution. Conservative daily permits will be prepared by Operations with assistance from Chemistry, per 2-SOP-5.1.5, to document (bound) potential impact to the effluents program. Accurate total activity released will be integrated into the site's IOCFR50 effluent tracking system for inclusion in the annual effluent report, as required.

Given these controls and work order guidance, this one-time evolution remains in keeping with ODCM requirements and does NOT represent a departure from ODCM effluent regulation. Good ALARA principles will be maintained with the addition of the temporary instrumentation and existing ODCM requirements will be applied to the release.

V.

REFERENCES NRC's Effluent Inspection Module - Attachment 71122.01, May 2006 NRC's Standard Review Plan (NUREG 0800 and its replacement, NUREG 1520, Section 9, Env Protection), March 2002 Existing Offsite Dose Calculation Manual and SPDES permits NUREG 0133 and Regulatory Guide 1.21 EN-RP-113, Reporting Spills EN-CY-108, Contamination of Clean Systems IP-SMM-CY-001, Rad Eft Control Program 2-SOP-5. 1.5, Calculation and Recording of Radioactive Liquip'leleases A

Prepared By:

Name/Signature Steve Sandike / t,,

Date: 6/13/2008 l

v

Temp Mod for Release of Unit 1 Pool Water Option to divert to routine liquid waste processing Canal 9-17-08

LIQUID WASTE RELEASE CALCULATIONS from the IPEC ODCM Apr 30 2008 Page 1 of 2 400,000 gal of Ul pool water, with typical site dilution, released ver 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, WITH NO PROCESSING OR REDUCON IN SOURCE TERM.

WASTE VOLUME

= 4.OOOOOE+05 gal DILUTION VOLUME 5

=2.88 OOE+08 gal RELEASE DURATION

=

240 minutes DILUTION FLOW RATE

=

1.20000E+06 gpm AVG RELEASE RATE

=

1.667E+03 gpm total MPCW eff

=

1.073E-05 CURIES (w/o H-3,GAS)=

2.336E-01 Ci's gamma MPCW eff

=

1.OOOE-05.

NOBLE GAS CURIES

=

0.OOOE+00 Ci's BETA CURIES

=

2.165E-02 Ci's PRE PRE POST POST MICRO-ISOTOPE DILUTION DILUTION DILUTION DILUTION CURIES uCi/ml CONC/MPC uCi/ml CONC/MPC RELEASED H-3 1.OOE-05 1.OOE-03 1.39E-08 1.39E-06 1.51E+04 NI-63 2.77E-06 2.77E-03 3.85E-09 3.85E-06 4.19E+03 SR-90 1.53E-06 3.06E-01 2.12E-09 4.25E-04 2.32E+03 CS-137 1.50E-04 1.50E+01 2.08E-07 2.08E-02 2.27E+05 TOTAL 1.64E-04 1.53E+01 2.28E-07 2.13E-02 2.49E+05 The 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> duration is very SHORT for this much water, but conservative. This value chosen so we can be sure the post-dilution conc/mpc is below 1, therefore no IOCFR20 concern.

< mrem >--

AGE GROUP BONE LIVER TOT BODY THYROID KIDNEY LUNG GI-LLI ADULT 1.01E-02 1.21E-02 8.19E-03 3.13E-09 4.10E-03 1.36E-03 2.66E-04 TEEN 1.05E-02 1.26E-02 4.61E-03 2.41E-09 4.28E-03 1.66E-03 2.05E-04 CHILD 1.30E-02 1.15E-02 1.91E-03 2.01E-09 3.73E-03 1.35E-03 8.33E-05 CRITICAL AGE GROUP CHILD CRITICAL ORGAN BONE ADULT Doses by Isotope in the SW sector, @ 1.4 km, with % limits

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< mrem >

ISOTOPE BONE LIVER TOT BODY THYROID KIDNEY LUNG GI-LLI.

H-3 0.OOE+00 3.13E-09 3.13E-09 3.13E-09 3.13E-09 3.13E-09 3.13E-09 NI-63 1.53E-04 1.06E-05 5.14E-06 0.OOE+00 0.OOE+00 0.OOE+00 2.21E-06 SR-90 1.07E-03 0.OOE+00 2.64E-04 0.OOE+00 0.OOE+00 0.OOE+00 3.09E-05 CS-137 8.83E-03 1.21E-02 7.92E-03 0.OOE+00 4.10E-03 1.36E-03 2.33E-04 TOTAL 1.01E-02 1.21E-02 8.19E-03 3.13E-09 4.10E-03 1.36E-03 2.66E-04

% qrt lim 2.01E-01 2.42E-01 5.46E-01 6.27E-08 8.20E-02 2.73E-02 5.33E-03

% ann lim 1.01E-01 1.21E-01 2.73E-01 3.13E-08 4.10E-02 1.36E-02 2.66E-03

Page 2 of 2 TEEN Doses by Isotope

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< mrem >------------------------------------

ISOTOPE BONE LIVER TOT BODY THYROID KIDNEY LUNG GI-LLI H-3 O.OOE+00 2.41E-09 2.41E-09 2.41E-09 2.41E-09 2.41E-09 2.41E-09 NI-63 1.59E-04 1.12E-05 5.39E-06 O.OOE+00 O.OOE+00 0200E+00 1.78E-06 SR-90 8.96E-04 O.OOE+00 2.21E-04 O.OOE+00 O.OOE+00 O.OOE+00 2.52E-05 CS-137 9.45E-03 1.26E-02 4.38E-03 O.OOE+00 4.28E-03 1.66E-03 1.78E-04 TOTAL 1.05E-02 1.26E-02 4.61E-03 2.41E-09 4.28E-03 1.66E-03 2.05E-04

% Qrt Lim 2.10E-01 2.52E-01 3.07E-01 4.82E-08 8.57E-02 3.32E-02 4.lIE-03 CHILD Doses by Isotope

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< mrem >------------------------------------

ISOTOPE BONE LIVER TOT BODY THYROID KIDNEY LUNG GI-LLI H-3 O.OOE+00 2.01E-09 2.01E-09 2.01E-09 2.01E-09 2.01E-09 2.01E-09 NI-63 2.11E-04 1.13E-05 7.17E-06 O.OOE+00 O.OOE+00 O.OOE+00 7.60E-07 SR-90 7.96E-04 O.OOE+00 2.02E-04 O.OOE+00 O.OOE+00 O.OOE+00 1.07E-05 CS-137 1.20E-02 1.15E-02 1.70E-03 O.OOE+00 3.73E-03 1.35E-03.

7.18E-05 TOTAL 1.30E-02 1.15E-02 1.91E-03 2.01E-09 3.73E-03 1.35E-03 8.33E-05

% Qrt Lim 2.60E-01 2.30E-01 1.27E-01 4.02E-08 7.47E-02 2.69E-02 1.67E-03 This test compared to 2007 Effluents:

2007 Routine Site IGroundwater, Ul pool Percent U1 Pool Percent Ul Pool Curies Total, Curies IPEC, curies test, curies vs Routine vs GW + RotnC Cs-137 1.07E-02 1.58E-05 2.27E-01 2114.2%

2111.1%

Sr-90 6.42E-04 6.13E-05 2.32E-03 361.4%

329.9%

Ni-63 1.48E-02 3.10E-06 4.19E-03 28.4%

28.4%

Site I 1.12E-03 2.51E-03

[

8.19E-03

.1.30E-02 I

U1 pool test percent of total site, 2007==> I 731%

1 5,18%

CHEMISTRY WORK STEP LIST Sampling Requirements for Unit 1 Fuel Pool Draining RP WORK STEP LIST # CH-W.L.-CH-30, TITLES NECESSARY FOR APPROVAL: Chemistry Supervisor PRECAUTIONS/LIMITATIONS:

Standard safety practices SHALL be observed at ALL times.

REFERENCES:

GLS Sampler Instruction Manual EQUIPMENT:

GLS Samplers 1 liter PCB Sample bottles 500 cc poly bottles INSTRUCTIONS:

1.

Initial Conditions a

Purification system in service on recirc for 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> prior to start of release Sample compositors setup at the outlet of each carbon bed Composite samples set up to start sample collection with the following frequency:

Compositor 1 (Outlet of first charcoal (GAC) bed)

Sample size 500 cc Sampling frequency is approx every 360 minutes Compositor 2 (Outlet of 24x7 skid, after second GAC bed)

Sample size 500 cc Sampling frequency is approximately every 30 minutes

2. The system will be operated in recirc for at least 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> prior to draining. During that recirc period, obtain a sample from Compositor 1 & 2 by manually activating the sampler until sufficient sample has been obtained.

3.

During the recirc, obtain a samples for PCB, and separately, another sample for gamma spec and boron, from both compositors, Then dump any remaining sample in the compositor bottles back into the pool. The release will start after Ops clears the tagout.

4. After the release has started, sample the stream as follows:

Compositor 1:

Every 3 days for PCB, gamma spec activity, and H-3.

Compositor 2:

Every 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> for gamma spec activity (with ADC at least daily),

Daily for PCB sample (plus a duplicate). Daily for Boron.

Record flow totalizer reading.

" After collecting a sample from the compositors, dump the remaining water back into pool.

Use the Waste Distillate counting sequence for gamma spectroscopy analysis.

5. After counting, acidify compositor 2 samples with 5 mls of nitric acid, label and save.

6. Weekly a composite will be made from the saved acidified samples for SPDES boron and off-site beta analyses (Sr-90/Ni-63).

7. Enter results of compositor 2 (Activity, ADC, and Boron) in WinCDMS spent fuel pool-west demin out, and also log in CCR. This information will be needed by Operations for the release permit.

APPROVALS:

Chemistry Supervisor:

Terminated:

Name /Date Name IDate

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Temp Mod for Release of Unit I Pool Water Option to divert to routine liquid waste processing Routine Distillate Tank, Discharge Line Temp line into "CST

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F l o w m eet e re ff lin e "'

FNIST totalizer GAC =granular activated carbon, primarily for assurance of PCB removal.

~Canal 9-17-08