ML20246H486
| ML20246H486 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 05/16/1989 |
| From: | Henson J TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20246H444 | List: |
| References | |
| TI-115, NUDOCS 8909010267 | |
| Download: ML20246H486 (20) | |
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TENNESSEE VALLEY AUTN RITY SEQUOYAi! NUCLEAR PLANT TECHNICAL INST 00CTION TI-ll5 INSTRUCTIONS FOR SEWAGE MANAGEMENT Revision 1 s
l UNIT QA REVIEW REQUIRED Of 10 2O N/A D YESA[
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RESPONSIBLE SECTION:
Environmental (Chemistry)
PREPARED / REVISED BY:
Michael B. Stiefel 5
SUBMITTED BY:
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esponsitile Section Supervisor
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SITE QA CONCURRENCE:
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APPROVED BY:
01 Appro'prJate Responsibl~e Manager DATE APPROVED:
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EFFECTIVE DATE:
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L The last page of this instruction is number:
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.o SEQUOYAH NUCLEAR PLANT PLANT INSTRUCTION REVISION LOG 3
Technical Instruction TI-115
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' REVISION Date Pages REASON FOR REVISION (INCLUDE COMMITMENTS AND LEVEL Approved Affected ALL ICF FORM NUMBERS)
New Instruction to describe the precautions, radiological sampling requirements, methods, limitations, management requirements, and
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recordkeeping requirements applicable to onsite 0
12/01/88 1-20 sewage treatment / disposal.
Revised to define requirements applicable to 1-18; releases to unrestricted areas and to correct Deleted typographical enon.
Deleted Appendix D and g.[ g gggg 1
19-20 Appendix E.
Added new Appendix E.
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SQN TI-115 Page 1 Revision 1 1.0 PURPOSE This procedure describes the precautions, sampling requirements, sampling methods-, radiological limitations, management practices, and recordkeeping requirements applicable to onsite sewage treatment and disposal systems and to the removal of sewage for offsite disposal.
This procedure doos not address NPDES permit requirements which are specified in TI-64.
2.0 REFERENCES
I 2.1 Memorandum from Jim L. Bates to James L. McAnally dated August l
24, 1988, on the subject "Sequoyah Nuclear Plant (SQN) Sewage Report" (L75 880824 800).
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2.2 IE Bulletin 80-10. " Contamination of Nonradioactive System and k
Resulting Potential for Unmonitored, Uncontrolled Release of Radioactivity to Environment."
2.3 IE Notice 88-22, " Disposal of Sludge from Onsite Sewage Treatment Facilities at Nuclear Power Stations."
2.4 10 CFR Part 20 " Standards for Protection Against Radiation."
2.5 National Pollutant Discharge Elimination System (NPDES) Permit l
No. TN0026450.
2.6 Technical Instruction (TI)-64, " Implementation of EPDES Permit."
3.0 RESPONSIBILITIES 3.1 Superintendent, Chemistry and Environmental - Responsible for ensuring tht.t the precautions, sampling frequency requirements, L
sampling methods, and management practices specified by this procedure are followed. Responsible for ensuring that all j
sewage hauled offsite for disposal complies with the the limitations for radioactive materials specified in section 6.0 of this Procedure.
Ensures that the reautred samples are collected and that the sample counting time is sufficient to accurately determine a lower limit of detection value of 1.0 E-7 pC1/mi (100 pC1/1) for principal gamma emitters. Also responsible for maintaintag the records specified in section 7.0 of this Procedure.
4.0 RADIOLOGICAL MONITORING REQUIREMENTS,
4.1 Detailed Samp11na Instructions for each system are given in-Appendices A through C.
P 4.2 Minimum Sampilng Frequencies are listed on Table 1.0.
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TI-115 Page 2 Revision 1 5.0 MANAGEMENT'OF SEWAGE 5.1 Lift Station Discharge to Soddy Daisy Collector System -
5.1.1 The lift station discharge, pump well, or meter manhole (depending on accessability) shall be sampled on a weekly basis in accordance with Appendix A.
5.1.2 If the concentration or quantity of radioactive materials exceeds the limitations specified in section 6.0, the discharge from manhole GG shall be diverted.to the new sand filter system untti the condition has been L
corrected. This diversion will be accomplished by removing the plug in the outlet sewer from manhole GG which leads to the new sand filter and inserting the P=
plug into the outlet sewer which leads to the lift station. The Superintendent, Chemistry and Environmental, will initiate corrective action which will be established on a case by case basis.
5.1.3 Manhole 6C will be sampled on a weekly basis in J
accordance with Appendix A.
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5.2 New Sand Filter System (Outfall Number 112) -
t 5.2.1 Each tanker truckload of waste removed from this system L_
shall be sampled (Appendix B) to determine if the radioactive component is within applicable limitations (section 6.0) for offsite disposal.
5.2.2 If not within limits, the contents of the tanker shall be returned to the chamber from which it was pumped. No sewace shall be hauled offsite unless it has been L
sampied and determined to meet the limits specified in section 6.0.
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L 5.2.3 The New Sand Filter System effluent shall be sampled on a monthly basis in accordance with Appendix C, se: tion C3.1.
The limitations specified in Section 6.2 are j
applicable to this discharge. The effluent monitoring frequency shall be accelerated to once per day when the discharge from manhole GG is diverted to this system.
Appendix C also specifies methods for sampling the various treatment system chambers.
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TI-115 Page 3 l
Revision 1 5.0 MANAGEMENT OF SEWAGE (Continued) n 5.3 Other Recutrements P
5.3.1 A repeat sample shall be collected and counted whenever any sample analysis indicates that radioactive materials, other than naturally occurring isotopes, are e
present.
5.3.2 The Superintendent, Chemistry and Environmental, and RADCON shall be notified whenever radioactive materials, other than naturally occurring isotopes are detected in i
any sample.
r 5.3.3 If isotopes are detected which originate from l
individuals undergoing medical treatment (e.g.,
Technetium 99m), Radiological Control shall be notified.
i 5.3.4
.Whenever the contents of a tanker truck are returned to l
a treatment / holding system because of the presence of radioactive materials, the tanker truck shall be r
refilled with water or sewage from another source and L
shall be resampled per Apperdix B.
If the limitations specified in section 6.0 are met, the sewage or sewage / water mixture may be hauled offsite.
If limits l
are not met, continue rinsing and draining. Assistance L
shall be requested frcm Radiological Control as appropriate.
5.3.5 When the concentration of radioactive materials released via treated sewage to unrestricted areas exceeds the limitations specified in Section 6.2, action shall be taken, without delay., to restore the concentration to applicable limits. Such action will be established on a case-by-case basis by the Superintendent, Chemistry and Environmental.
6.0 LIMITATIONS 6.1 Limitations Applicable to Offsite Sewage Disposal u
6.1.1 Administrative limits for total gamma activity of 1 X 10-' pC1/ml for any one sample and 10 pC1 total quantity for any one day (from all sewage pathways) shall not be exceeded without approval from the Superintendent, Chemistry and Environmental.
6.1.2 The maximum permissible concentration (MPC) ratto using 10 CFR 20, Appendix B, Table 1, Column 2, will be determined for any release sample that has activity greater than the lower limit of detection. The HPC ratio for each sample must be i 1.
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Page 4-Revision 1 6.0 LIMITATIONS- (Contlnued) 6.1.3 The sum of all activity released from the site via sewage pathways for any day shall not exceed 10 times
-the activity of 10 CFR 20 Appendlx.C values for a specific isotope. If a combination of isotopes is released, the sum of the ratios of each isotope versus.
10 times the Appendix C values shall not exceed I for~
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any day.
6.1.4 The total activity released via sewage pathways shall not exceed 1 C1 per year.
6.1.5 P.adioactive materials released for offsite disposal must be readily soluble or discernible in water.
6.2 Limitations Applicable to Releases to Unrestricted Areas From Onsite Treatment Systems l
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_The concentration of radioactive material released to unrestricted areas shall be limited to the concentrations speelfled in 10 CFR Part 20, Appendix B, Table II, Column 2 for i
radionuclides other than dissolved or entrained noble gases.
For dissolved or entrained noble gases, the concentration shall be limited to 2 x 10" microcuries/ml total activity.
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6.3 The limitations specified in this section are not applicable to the naturally occurring isotopes or to isotopes which originated from Individuals undergoing medical diagnosis or therapy with
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radioactive material (e.g., Technetium 99m).
7.0 RECOR0 KEEPING AND REPORTING REQUIREMENTS L-7.1 Appendix D and Appendix E worksheets shall be completed for all samples collected pursuant to this Procedure.
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7.2 The Appendix D and Appendix E worksheets shall be maintained as-QA records in accordance with AI-7.
7.3 All activity (other than activity which originated from individuals undergoing medical diagnosis or therapy with v
radioactive material or the naturally occurring isotopes) released via a sewage pathway shall be reported in the Semi-Annu>1 Radioactive Release Report.
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Page 6 Revision 1 TABLE 1.0 RADIOLOGICAL MONITORING FREQUENCIES SEWAGE TREATMENT AND DISPOSAL System Sample Point Minimum Sample Freauency
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Lift Station Pump discharge, pump well, Weekly Discharge to or metering manhole Soddy Daisy New Sand Filter Effluent 1/ month Sewage Each load Power Operations Manhole SC Weekly Training Center g
Lift Station, r
Design Services
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.TI-115 Page 7 Revision 1 APPENDIX A Page 1 of 2 INSTRUCTIONS FOR SAMPLING FOR RADI0 ACTIVE MATERIALS LIFT STATION TO SODDY DAISY COLLECTOR, POTC LIFT STATION AND DESIGN SERVICES COMPLEX LIFT STATION m
A1.0 $TERIALSNEEDED A1.1 Rainsult or coveralls (optional - for protection).
A1.2 New 4-11ter or 1-11ter marinellt bekkerk with covers (check with laboratory to detennine required sample size).
A1.3 Marking pen, A1.4 Disposable gloves.
t A1.5 Duct tape or electrical tape.
L A1.6 C' lea.n metal or plast 1c bucket.
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'A1.7 Approximately 15 feet of clean rope.
l A1.8 Large screw driver (for raising manhole cover).
L A2.0 PRECAUTIOg A2.1 Sampling materials shall be free of radioactive contamination-New materials can be assumed to be free of contamination. Used materials i
l must be surveyed prior to use if the last sample collected with them i
was contaminated.
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TI-115 Page 8 Revision 1
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APPENDIX A s
Page 2 of 2 A3.0 INSTRUCTIONS A3.1. Wash bucket with soap and water.
A3.2 Attach rope.
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A3.3 While. standing ran end of rope, drop. bucket into manhole (or pump well) and retrieve sample.
A3.4 Pour 3,500 ml into a 4-11ter marinellt beaker or 800 mi into a 1-11ter beaker (check with laboratory).
If necessary, repeat A3.3.to obtain i
required volume.
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A3.5 Place lid'on'marinelli beaker and rinse the exterior of the beaker with water L
A3.6 t.abel beaker with sample location, date, time, and name of person who
' collected the sample.
L A3.7 Carefully seal the lid with duct tape or (preferably) electrical tape.
A3.8 Submit sample to laboratory for counting.
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TI-il5 Page 9-Revision 1 APPENDIkB Page 1 of-l 3
INSTRUCTION FOR SAMPLING SEWAGE TANKER TRUCKS FOR RADI0 ACTIVITY l
B1.0 MATEP.IALS NEEDED a
Bl.1-New 4-11ter or 1-liter marinelli beakers with covers (check with laboratory to determine required sample size),
i 81.2 Marking pen.
81.3 Disposable gloves.
Bl.4 Duct tape or electrical tape.
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B2.1 Backflush the tanker suction hose into the chamber from which sewage was pumped.for approximately 5 seconds.
82.2 Fill 1-11ter beaker with 800 ml of sample or 4-11ter beaker with 3,500 ml of sample depending on laboratory requirements.
L B2.3 Rinse, label, and submit sample (s) for counting per Appendix A, steps A3.5 through A3.8.
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APPENDIkC Page 1 of 3 INSTRUCTIONS FOR SAMPLING NEW SAND FILTER SYSTEM FOR RADI0 ACTIVITY C1.0 MATCRIALS NEEDED C1.1 New 4-11ter or 1-liter marinelli beaker (s) with cover (s) (check with laboratory to determine required sample size).
C1.2 Approximately 15 feet of clean rope.(l)
C1.3 Marking pen.
C1.4 Depth - composite sampler.(2)
C1.5 Disposable plastic gloves.
j Cl.6 Duct or electrical tape.
s C1.7 Bucket (preferably metal with approximately 10 quart capacity).(I)
C2.0 PRECAUTIONS C2.1 Sampling materials shall be free of radioactive contamination.
C2.2 Designated sampling devices shall be used and shall be surveyed after being used to collect a contaminated sample.
C3.0 INSTRUCTIONS C3.1 Effluent Samoling NOTE:
Effluent samples are dipped from the manhole immediately f
upstream from the effluent lift station. Use a clean plastic 6
or metal bucket with rope attached to collect samples.
C3.1.1 Slide minhole cover to one side to allow access for sampling.
3 C3.1 2 Lower the bucket into the manhole, being careful not to bump the wall of t,he manhole or allow the bucket to lodge in the outlet.
(I) Use for equalization tank samples.
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(2) Use for samples other than effluent or equalization tank.
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SQN TI-il5 Page 11 Revision 1
.APPENDIkC Page 2 of 3 C3.1.3 Retrieve sample and pour into marinelli.
Repeat C3.1.2 as necessary to obtain 800 ini sample in a 1-11ter beaker or 3,500 mi sample in a 4-liter beaker depending on the laboratory requirements.
C3.1.4 Replace manhole cover.
C3.1.5 Rinse,' label, and submit sample (s) for counting per Appendix A, steps A3.5 through A3.8.
C3.2 Equalization Tank Sampling NOTE:
Equalization tank samples are dipped with a bucket. A metal bucket is preferred due to the weight advantage.
C3.2.1 Wash bucket with soap and water.
L C3.2.2 Attach approximately 15 feet of clean rope to the bucket handle, f
.C3.2.3 Remove equalization tank access cover.
C3.2.4.
While standing on free end of rope, drop the bucket into the equalization tank.
L NOTE:
If a crust has formed on the surface, it may be necessary to repeatedly drop-the bucket (upside down).until the crust is broken.
C3.2.5 Retrieve sample and fill a 1-11ter marinellt with 800 mi sample i
or a 4-11ter marinellt with 3,500 ml of sample depending on L
laboratory requirements.
C3.2.6 Replace tank access cover.
C3.2.7 Rinse bucket and dispose of rope.
C3.2.8 Rinse, label, and submit sample for counting per Appendix A, steps A3.5 through A3.8.
C3.3 Sampling Septic Tanks, Dosino Tanks. Effluent Pumping Well, and j.
Chlorine Contact Tank g
C3.3.1 Assemble sections of depth composite sampler as required to reach the bottom of the tank to be sampled.
a C3.3.2 Remove tank access cover.
C3.3.3 Lower sampler to bottom of tank.
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3..E SQN TI-115 Page 12 Revision 1 APPENDIkC Page 3 of 3 3
C3.3.4 Seat the valve i.t the bottom of the sampler by holding the rope (at the top of he sampler) and shaking the device gently.
- C3.3.5 Remove sampler and empty contents into marinelli beaker.
(The valve is opened by pressing the valve rod against the bottom of the beaker.)
2 C3.3.6 Repeat 3.3.3 through 3.3.5 as required to obtain 800 mi sample in a 1-11ter beaker or 3,500 mi sample in a 4-liter beaker depending on laboratory requirements.
C3.3.7 Replace tank cover (s).
C3.3.8 Thoroughly rinse sampler with water.
C3.3.9 Rinse, label, and submit sample (s) for counting per Appendix A, l
steps A3.5 through A3.8.
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TI-115 Page 13 Revision 1; APPENDIX 0 Page I of 3
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'WORKSHEET FOR RADIOLO'ICAL SAMPLING G
OFFSITE SEWAGE DISPOSAL 2
Period Beginning /_/
and Eno.ag __/_ /__
Worksheet No.
TOTAL GAMMA WASTE TOTAL ACTIVITY FOR ALL SAMPLE SAMPLE SAMPLED BY/
ACTIVITY FOR VOLUME (6)
PATHWuYS fuCl)
SEO. NO. I DT I TM POINT ANALYST SAMPLE fuCI/mli al DAY YEAR 6
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1x10*7 (1) 10 1x106 ACTION!
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Worksheet No.
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ISOTOPES.
DAILY TOTAL 10ml0CfR SAMPLE ISOTOPES CONCENTRATION MPC (3)
MPC ACTIVITY FOR Appencix C. Al_.,g ut!I SED. NO.
PRESOtT (?)
f uci /vrt) fuci/ml)
RATIO ISOTOPE fucif)f7) VALUE fuCIC) uCic uCIC i
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Page 15 l
l Revision 1 APPENDhXD g
Page 3 of 3 i
Worksheet No.
Remarks:
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Cognizant Engineer Date l
L FOOTNOTES:
(1)
Administrative limit which may be exceeded with approval'of Superintendent, Chemistry and Environmental.
(2)
List each isotope detected in sample on a separat6 line.
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(3)
Maximum _ permissible cont.entration from 10 CFR 20, Appendix B, Table 1 Column 2.
(4)
If administrative limit is exceeded, calculate MPC ratio.
l (5)
Notify Superintendent, Chemistry and Environmental.
Ref.er to instructions in Ti-115, Section 5.0.
(6)
Volume of waste represented by sample (i.e., the volume of sewage in a i
tanker truck or in the case of the lift station, the total volume of seuage discharged since the previous sample).
Note:
Te convert gallons to milliliters, multiply by 3,790.
i (7)
Multiply each sample concentration (pC1/ml) by the corresponding volume in mill 111ters (see note (6) above) for each isotope detected for a given day.
S,um all values to obtain daily total activity (pC1) for each isotope.
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'Page 16 Revision 1' 3
APPENDIX E-Page 1 of 3 WORKSHEET FOR RADIOLOGICAL SAMPLING RELEASES TO UNRESTRICTED AREAS FROM SEWAGE TPEATMENT SYSTEMS Period Beginning __/_ /._ and Ending __/ _ /_,,Worksheet No.
e-TOTAL GAMMA WASTE SAMPLI
$ AMPLE SAMPLED BY/
ACTIVITY FOR VOLT 1ME (6)
SEO. NO. I DT l TM POINT ANALYST SAMPLE f uti/mL) 31 LIMIT None (1)
ACTION (4) (S) i l
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. APPENDIX E.
..3-Page 2 of 3 L>
- u-Period Beginning
,f_.f,,:;4nd Ending j_,J Worksheet No.'-
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ISOTOPES CONCENTRATION MPC (3)
' MPC
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PRESENT (2) fuC1/mL) fuC4/ml)
RATIO UMIT 1
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Page 18 l
Revision 1 APPENDhXE l
Page 3 of 3 Worksheet No,.
Remarks:
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A Results Reviewed by:
Cognizant Engineet Date L
FOOTNOTES:
l (1)
Administrative limit which may be exceeded with approval of.
Superintendent, Chemistry and Environmental.
(2)
List each isotope detected in sample on a separate line.
(3)
Use the maximum permissible concentration from.10 CFR 20, Appendix B.
Table II, Columa 2, for radionuclides other than dissolved or entrained I
noble gases.
For dissolved or entrained noble gases, the maximum L
permissible concentration is 2 x 10-4 pCi/ml.
(4)
If administrative limit is exceeded, calculate MPC ratio.
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(5)
Notify Superintendent, Chemistry and Environmental <
Refer to instructions in TI-ll5, Section 5.0.
(6)
Volume of waste represented by sample (i.e., the volume of sewage discharged since the previous sample).
Note:
To convert gallons to milliliters, multiply by 3,790.
(7)
Multiply each sample concentrattori (pCi/ml) by the corresponding volume in milliliters (see note (6) above) for each isotope detected for a given day. S'um all values to obtain daily total activity (pC1) for each isotope.
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