ML062930083
| ML062930083 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 07/13/2006 |
| From: | Erickson M, Hummer J, Tozzie N Yankee Atomic Electric Co |
| To: | NRC/FSME |
| References | |
| YNPS-FSSP-OOL09-01-00, YNPS-FSSP-OOL09-02-00, YNPS-FSSP-OOL09-03-00, YNPS-FSSP-OOL09-04-00, YNPS-FSSP-OOL09-05-01 | |
| Download: ML062930083 (47) | |
Text
Final Status Survey Planning Worksheet Page 1 o f 8 GENERAL SECTION Survey Area No.: 00L-09 Survey Unit Name: Southeast Construction Fill Area (Pile #24 Footprint)
FSSP Number: YNPS-FSSP-00L09-01-00 PREPARATION FOR FSS ACTIVITIES Check marks in the boxes below signify affirmative responses and completion of the action.
1.1 Files have been established for survey unit FSS records. 5 1.2 ALARA review has been completed for the survey unit. Refer to YA-REPT-00-003-05 1.3 The survey unit has been turned over for final status survey. 0 1.4 An initial DP-8854 walkdown has been performed and a copy of the completed Survey Unit Walkdown Evaluation is in the survey area file. I Z
i 1.5 Activities conducted within area since turnover for FSS have been reviewed.
Based on reviewed information, subsequent walkdown: El not warranted warranted If warranted, subsequent walkdown has been performed and documented per DP-8854.
OR 1.6 The basis has been provided to and accepted by the FSS Project Manager for not performing a subsequent walkdown. El 1.7 A final classification has been performed. Pl
1.8 Classification
CLASS 1 El CLASS 2 CLASS 3 DATA QUALITY OBJECTIVES (DQO)
--- A 1.0 State the aroblem:
00L-09-0 1 is open land area consisting of an approximately I, 102 sq m surface area and at one time contained an accumulation of soil and construction debris as well as discarded components that were generated over the life of the plant. During decommissioning, RSS concrete rubble, as well as material >DCGL were stockpiled within the boundaries of Survey Unit 01. 00L-09-0 1 contains the footprint/remnants of Pile #24 - consisting of RCA soil and debris as well as RSS (Reactor Support Structures) concrete rubble. Due to the potential impact of the RSSIRCA debris being transported and stored on a portion of 00L Survey Unit 01 is designated as Class 1. The problem as defined by this survey plan is to demonstrate that the years of plant operation and stockpiling of RSSIRCA soils and concrete rubble did not result in an accumulation of plant-related radioactivity that exceeds the release criteria.
The planning team for this effort consists of the FSS Project Manager, FSS Radiological Engineer, FSS Field Supervisor, and FSS Technicians. The FSS Radiological Engineer will make primary decisions with the concurrence of the FSS Project Manager.
2.0 Identify the decision:
Does residual plant-related radioactivity, if present in the survey unit, exceed the release criteria? Alternative actions may include no action, investigation, resurvey, remediation and reclassification.
3.0 Identify the inuuts to the decision:
DPF-8856.1 Page 1 o f 8
Sample media:
Types of measuGents: II Soil soil samples, ISOCS Assays and gamma scans Radionuclides-ofconcern: cob', csl", C" and H3 L J Applicable DCGL: The DCGLs applied under this survey plan correspond to annual doses of 8.73 mremly (the 10-mremly DCGL adjusted for the dose contributions from sub-surface concrete structures and tritium in ground water).
DCGL Nuclide DCGL DCGL Nuclide (pCi/g> (pCi/g) Nuclide (~ci/g) corn 1.4E+00 EU"~ 3.6E+00 srgO-6.OE-01 Nb94 2.5E+00 EU"~ 3.3E+00 ( TC" 5.OE+OO 2 . 5 E + 0 0 - -Eu 1.4E+02 PU~'~
~u~~~~~
1.2E+O1 sblL5 I.lE+Ol H~ 1.3E+02 1.1E+OI-csn4 1.7E+00 c'~ 1.9E+00 ~u~~~ 3.4E+02 cs1j7 3.OE+00 ~ e " 1.OE+04 ~ r n ' ~ 1.OE+O 1 N iGf 2.8E+02 ~ m ~ 1. IE+Ol
~ ~ " ~ ~
L HSA data were used to prepare this FSS plan. co60 and were the only identified LTP nuclides of any consequence.
Since the decommissioning started, concrete rubble that was contaminated with H3 and cl%as stored on the ground in this survey unit. This was gathered up, but because of this history, all samples will be sent off site to be analyzed for these two radionuclides. These nuclides were not included in the calculation for SPA-3 measurements because they would not be detectable. Ten extra samples were added to the grid to compensate for the inability to scan for hard to detect radionuclides.
The presence of all LTP-listed radionuclides (gamma-emitters, HTD beta-emitters, and TRUs) in the soil will be evaluated under this survey plan. The YNPS Chemistry Dept. will analyze each FSS soil sample for all LTP-listed gamma-emitting nuclides, except Cm2431244 In ad i ion, &IFSS soil samples will be sent to an independent laboratory for analyses of H' and c"% .' "'sfip!l ly e or 5% will be analyzed at the off-site laboratory for gamma emitters, HTD beta-emitting radionuclides, and alpha-emitting radionuclides, which will include ~ m ~ ~ ~ " ~ ~ .
P Survey Design /Release Criteria ClassiJication: Class 1 Average Co6' concentration: 0.0059 pCi1g Standard deviation co6* (a): 0.02 18 pCi/g Average Cs13' concentration: 0.146 pCi/g Standard deviation CS'." (0: 0.15 7 pCi/g Weighted sum (a): 0.055 LBGR: Initial = 0.5 x DCGLGA,Adjusted = 0.89 Surrogate DCGL: NIA (a surrogate DCGL will not be used)
Number of Samples: Calculated = 15,25 will be obtained Survey Unit Area: 1,102 m2 DPF-8856.1 Page 2 of 8 YNPS-FSSP-00L090 1-00
44.1 mL 2.1 pCi/g (based on AF = 1.5) 9.3 pCiIg (based on AF = 3.1)
Investigation Level for soil >DCGLEMcfor either Co60,and -or-samples:
- A sum of DCGLEM~ fractions > 1.0 -or-
- >DCGL for C S " ~or co60 and a statistical outlier as defined in the LTP.
N d : The same criteria will be applied to any other LTP-listed nuclide if identified in the soil samples.
Scan Coverage: 100% of the surface area will be scanned, either by ISOCS or by SPA-3.
ISOCS scans will be on a 4m by 4m grid, going to within 2 meters at the edges.
1 Investigation Level for ISOCS 0.18 pCi/g for co60 measurements: 0.7 pCi/g for C S " ~
-or- a sum of their fractions > 1.0 Note: The investigation levels developed in this manner (in accordance with YA-EVAL-00-001-06) are sensitive enough to detect the DCGLEMc values based on the grid area.
! MDCs for ISOCS measurements: r---T MDC I I MDC I 1-Nuclide (pCi/g) Nuclide (pCi/g) Nuclide (pCi/g)
- co60 1.8E-01 sbm 1.OE+00 EU'~' 4.1E-01 s4 2.6E-01 ~s~~~ 3.OE-0 1 3.8E-0
- - 1 AglDBm 2.5E-01 7.OE-01 EU'~' 1.1E+01 L-Note: The MDCs listed in the above table are equal to the investigation level for ISOCS measurements. Contact the FSSE if the MDC values in the above table cannot be achieved in a reasonable count time.
SPA-3 Gamma Scan SPA-3 scans will be performed in areas where restricted access prevents Coverage: the use of ISOCS. These scans will cover 100% of the surface area that is not covered by ISOCS scans.
SPA-3 scans will be performed for surface soil within the field-of-view of an ISOCS assay or surrounding a FSS sample location that exceeds the investigation criteria. The SPA-3 scan will cover 100% of the ISOCS assay total field-of-view area (24.6m2) or a 2.8-m radius around the FSS sample location. SPA-3 MDCRs and MDCs are shown in Attachment I.
Investigation Level for SPA-3 Reproducible indication above background using SPA-3 and audible Scans: discrimination. The expected background range for SPA-3 scans is between I 5,000 cpm and 25,000 cpm.
1 Radionucljdesfor analysis: All LTP nuclides with the focus on csI3', co60, cI4and H' Nuclide 10% - 50% of DCGL (pCi/g) co60 1.4E 7.OE-01 N b94 2.5E 1.3E+00
~ g ' ~ ~ 2.5E-01
~ - 1.3E+00 sb12' 1.1E+00 - 5.6Et-00 cs13" 1.7E 8.7E-01 cs1j7 3.OE 1.5E+00 EU'~* 3.6E-0 1 - 1.8E+00 EU"~
- 3.3E 1.7E+00 --
DPF-8856.1 Page 3 of 8
E U ' ~ 1.4E+01 - 6 . 9 ~ + 10 The desired MDCs in the laboratory analyses of FSS soil samples will be the 10% DCGL values. If it is impractical to achieve those, the 50%
DCGL values must be achieved in the laboratory analyses of the FSS soil samples.
MDCs for HTD nuclide: Nuclide 10%- -
H~ 1.3E+01 - 6.4E+01 cI4 1.9E 9.7E-01
~e~~ 1 .OE+03 - 5.1E+03
~i~~ 2.8E+01 - 1.4E+02 sr90 6.OE 3 .OE-0 1
~c~~ 5.OE-0 1 - 2.5E+00
~u~~~ 1.2E+00 - 5.8E+00
~u~~~ 1 .I E+OO - 5.3E+00 P U ~ ~ ' 3.4E+0 1 - 1.7E+02
~ m ~ " 1.OE+00 - 5.1E+00
~m~~~ 1 . I E+00 - 5.6E+00 The MDC values for difficult to detect nuclides will be conveyed to the outside laboratory via the sample chain-of-custody form DPF-8823.1 which will accompany the soil samples.
MDCR for SPA-3: The accompanying MDCIMDCR table in Attachment 1 provides MDCR values by various background levels.
MDC @CGL,,,,,,,,,,3 for SPA-3 The accompanying MDCIMDCR table in Attachment 1 provides MDC scans: values by various background levels.
QC c h e c h and measurements: QC checks for ISOCS will be in accordance with DP-8869 and DP-8871.
QC checks for the Leica GPS will be performed in accordance with DP-8859.
QC checks for the SPA-3 will be performed in accordance with DP-8504.
Two QC split samples will be collected (note: this is in accordance with DP-8852 requirements.)
Two soil sample QC Recounts will be performed by the YNPS Chemistry Lab (note: this is in accordance with DP-8852 requirements.)
4.0 Define the boundaries of the survey:
Boundaries of Survey Unit 00L-09-01 are as shown on the attached map. Survey Unit 01 is not part of the RCA and there are no sub-surface systems that traverse or connect within the survey unit. Survey area OOL-09 is bounded by 00L-08 on the north and south, 00L-09-02 to the east, and 00L-09-03 to the west. Survey unit 01 is entirely buffered by a land area that will be designated as Survey Unit 00L-09-03.
The survey will be performed under appropriate weather conditions (as defined by instrumentation limitations and human tolerance). Surveys may be performed on any shift of work.
5.0 Develop a decision rule:
Upon review of the FSS data collected under this survey plan:
DPF-8856.1 Page 4 o f 8 YNPS-FSSP-00L090 1-00
data show that the soil concentrations of LTP-listed nuclides are below the mremiyear DCGLs and the sum of fractions of LTP-listed nuclides are below unity, then reject the null hypothesis (i.e., Survey Unit 00L-09-01 meets the release criteria).
1 (b) Ifthe investigation levels are exceeded, perform an investigation survey. 1 (c) Lf the average concentration of any LTP-listed nuclide exceeds its respective DCGL, or the average sum of fractions of LTP-listed nuclides exceeds unity, then accept the null hypothesis (i.e., Survey Unit 00L 01 fails to meet the release criteria).
- N
- Alternate actions include investigations, reclassification, remediation and resurvey.
6.0 Svecifv tolerable limits on decision errors:
radioactivity in Survey Unit 00L-09-0 1 exceeds the release criteria.
1( l i t y of vpe II error: i 0.05 11 LBGR:
I The applicable soil (8.73-mremiy) DCGL c 2 Ii I --
LBGR = 0.5 calculated, 0.89 adjusted I
I' I 2 7.0 Optimize Desi~n:
Type of statistical test: WRS Test Sign Test El (background will not be subtracted)
Number and Location of Samples: 25 soil samples will be collected at locations based on a random start, systematic triangular grid (refer to accompanying DPF-8853.2).
Biased samples: See specific instruction #2.
INSTRUCTIONS possible, measurement locations will be identified using GPS in accordance with DP-8859. Each location will be marked to assist in identifying the location. Any locations that are not suitable for soil sampling will be relocated to the nearest suitable location and documented in the field log in accordance with DP-8856.
1 2. Soil samples will be collected in accordance with DP-8 120.
1I
- 3. Chain of Custody forms will be used in accordance with DP-8123 for all soil samples sent to an off-site laboratory.
- 4. All soil samples will be received and prepared in accordance with DP-8813. m: Samples to be sent to an off-site lab will not be dried prior to counting on site or shipping.
1 5. Collect ISOCS measurements in accordance with DP-8871 to provide 100% scan coverage of the survey unit.
/I
- 6. Survey instrument: Operation of the E-600 w/SPA-3 will be in accordance with DP-8535 with QC checks performed in accordance with DP-8504. The instrument response checks shall be performed before issue and after use.
- 7. All SPA-3 scans will be performed with the audible feature activated. FSS Technicians will listen for upscale readings to which they will respond by slowing down or stopping the probe to distinguish between random fluctuations in the background and greater than background readings.
X 8. The job hazards associated with the survey described in this package are addressed in the accompanying Job Hazard Assessment (JHA) for 00L-09-01.
- 9. All personnel participating in this survey shall be trained in accordance with DP-8868.
DPF-8856.1 Page 5 of 8
SPECIFIC INSTRUCTIONS
- 1. All designated measurement locations will be identified by GPS per DP-8859 or by useofreference points and tape measure as necessary. If a designated sample location is obstructed for any reason, the FSS Radiological Engineer or the FSS Field Supervisor will select an alternate location in accordance with DP-8856. A detailed description of the alternate location will be recorded on form DPF-8856.2, the survey unit map will be annotated appropriately, and the alternate location will be conspicuously marked to facilitate re-visiting to identify and record the coordinates with GPS in accordance with DP-8859 or by measurement from a known reference point when GPS is not available.
1 2. Sample Requirements:
1I Collect 25 random 2-liter soil samples in accordance with DP-8120. Two of the 25 random soil samples will be analyzed as a QC split sample to fulfill the QC requirement of DP-8852. The same QC split sampleswill also be analyzed for Hard-to-Detect nuclides in accordance with section 5.6.3.2.1 of the LTP and DP-8856.
Collection of soil samples containing any portion of concrete larger than sample screen require crushing and homogenizing prior to being analyzed. If large concrete debris is observed during sampling process, notify Lse\.. 5ia3%u$~~5 F S su erv. bi or s En h e r -4xJ 1
~ w. h a l - ~ r l l c o ~ r r ~ ~ ~ is
- 3. soilSample ~ ~ ~ iCONCGT
- A ~
~ d\,*~fu:J,
~ ~ t w:&r r ~
i ~ r~ \- ~ :: L
- \
4 2 LC 5 u b b \ ~
c :
- jCilllOL oc I FSS soil samples:
concrck 1 OOL-09-0 1-00 1-F through O C C J S 5a.h I sample locations 00 1 through 025. O L~
- O ~ - Oe 4~
Y ~ ~ ?
to F n
FSS~7 ,,,MiM\\
~~~S~S,~~
I 00L-09-0 1-001-F-H through 00L-09-0 1-025-F-H (excluding 00L I R 0 1-003-F-Sand 00L-09-0 1-006-F-S) corresponding to the same 23 samples when analyzed off-site for H~ and c ' ~DO . not dry samples prior to sending to off-site lab.
Biased soil samples: -id$& mL-09 - 0 , -0lU-8 &p.ulh (X)L'O*-OL-0%-
4 O L &r:(;nw G, X .4 4Sw-p
. (cofi+In~ e QC split samples: 00L-09-01-003-F-S and O~L-09-01-006-F-sto be designited as QC I I split samples. I I Recount samples:
- 4. Sample Analysis: 'i~:
I SG.
1 00L-09-0 1-012-F-RC and 00L-09-0 1-014-F-RC are to be counted twice on site. The results will be compared in accordance with DP-br\de~' -i%r oFF s : k and I
S &
- P ~ ~ S .gb1t31ldl s ) ~
Gamma analysis will be performkd on ar$ii-samples.- !I any of the gamma'analyses show that an11 investigation level has been exceeded an investigation survey will be conducted at that sample location as directed in specific instruction # 6. I YNPS Chemistry will analyze 00L-09-01-012-F and 00L-09-0 1-014-F as a sample recounts.
recounted sample will possess the naming convention 00L-09-0 1-0 12-F-RC and 00L-09-0 1-014-F-R-C.
On-site gamma analysis of the FSS samples shall achieve the MDC values stated in the DQO section of this plan. The MDCs will be communicated to the laboratory using an attachment to the Chain-of-Thel Custody form.
The off-site laboratory will analyze 00L-09-0 1-001-F-H through 00L-09-0 1-025-F-H (excluding00L-09-01-003-F and 00L-09-01-006-F) for H-3 and C-14. Each sample will be comprised of at least 500 ml homogenous aliquot of wet sediment and prepared in accordance with DP-8813, "Sample Receipt and Preparation."
a W :Ensure that the lid of the container is secured and sealed with electrical tape to prevent loss of moisture during shipping.
N A : Renaming the off-site samples is necessary to ensure unique naming convention for gamma-emittinga 1
DPF-8856.1 Page 6 of 8
r- nuclides and HTD.
- 5. ISOCS Assays:
e ISOCS investigation levels are based on specific spacing of ISOCS assays. ISOCS assays, when using the 180' collimator at 1-meter, are restricted to:
(1) A maximum spacing of 4 meters between assay locations.
I (2) A maximum spacing of 2 meters from any survey unit boundary.
ISOCS assays are designated as 00L-09-01-xxx-F-G where xxx corresponds to the 3-digit location I
indicated on survey map "ISOCS Scans".
QC checks shall be performed daily in accordance with DP-8869 and DP-8871. Resolve flags encountered prior to survey.
ISOCS assays to be performed with 180' collimator at lm unless otherwise directed by the FSS Engineer.
Make note on the daily survey journal (DPF-8856.2) if other geometries are used. 1 Designate additional assay locations in continuing sequence from the last number assigned to an FSS measurement. Record detailed information about additional assay locations on the daily survey journal.
If the results on any ISOCS assay exceed an investigation level, investigate the area within the scan grid area for that assay as directed in Specific Instruction # 7.
Remove standing water prior to performance of ISOCS assays. Contact the FSS Engineer for directions if conditions are such that standing water cannot be removed.
I1 6. If the results of any FSS sample (statistical and/or biased points) analysis exceed an investigation level, perform a first level investigation as follows:
N a : Detailed descriptions of investigation actions shall be recorded in the daily survey journal (DPF-8856.2).
I1 1 Review ISOCS data for assays in which the sample requiring investigation may have been in the field of11 view.
1I Scan a lm radius footprint around the sample location with a SPA-3 in rate-meter mode moving the detector at a speed of 0.25m or less per second, keeping the probe at a distance of approximately 3" from the surface and following a serpentine path that includes at least 3 passes across each square meter. The area of scan should be increased as necessary to bound any areas of elevated activity identified.
N A : Notify FSS Supervisor or FSS Engineer for further instructions if Background exceeds 25,000 cpm.
Mark the boundaries around any detected elevated areas in the soil and identify the boundaries on a survey H
map. Measure the total area of each outlined area in square centimeters.
Mark the location of the highest identified activity for each of the elevated areas in the soil and on the survey map.
I At each of the highest identified activity areas:
I/
01-xxx-F-SC-I" where-- "xxx" continues 1 Perform and record a 1-minute scaler mode SPA-3 measurement. Designate the reading as "00L -- sequentially from the last number assigned to an FSS DPF-8856.1 Page 7 of 8
measurement.
Obtain a soil sample at the location. Designate the sample as "00L-09-01-xxx-F-I" where "xxx" continues sequentially from the last number assigned to an FSS measurement.
Perform and record a post sample 1-minute SPA-3 measurement. Designate the reading as described above.
- 7. If the results of an ISOCS assay exceed an investigation level, perform a first level investigation as follows:
H J : Detailed descriptions of investigation actions shall be recorded in the daily survey journal (DPF-8856.2).
Scan the ISOCS footprint with a SPA-3 in rate-meter mode moving the detector at a speed of 0.25m or less per second, keeping the probe at a distance of approximately 3" from the surface and following a serpentine path that includes at least 3 passes across each square meter.
Mark the boundaries around any detected elevated areas in the soil and identify the boundaries on a survey map. Measure the total area of each outlined area in square centimeters.
Mark the location of the highest identified activity for each of the elevated areas in the soil and on the survey map.
At each of the highest identified activity areas:
Perform and record a 1-minute scaler mode SPA-3 measurement. Designate the reading as "00L 01-xxx-F-SC-I" where "xxx" continues sequentially from the last number assigned to an FSS measurement.
Obtain a soil sample at the location. Designate the sample as "00L-09-0 I -xxx-F-I" where "xxx" continues sequentially from the last number assigned to an FSS measurement.
Perform and record a post sample 1-minute SPA-3 measurement. Designate the reading as described above. Re-perform the ISOCS assay.
Designate the assay as "00L-09-01-xxx-F-G-I" where "xxx" continues sequentially from the last
--FSS measurement.
number assigned to an NOTLFICATION POINTS:
None.
Date _6/40b -
Date- 6-12-06 Approved by "t.n c,;fbi Date
&S Project &Imager DPF-8856.1 Page 8 of 8
YNPS-FSSP-00L-09-01-00 Attachment 1 SPA-3 Scan Tables Max Backaround Scan S ~ e e d (m/sec)
Speed BKG (cpm) -
1.OO 6,000
YNPS-FSSP-OOL-09-01-00 Attachment 2 DCGL MDC Table
Final Status Survey Planning Worksheet Page 1 o f 8 GENERAL SECTION Survey Area No.: 00L-09 / Survey Unit No.: 02 Survey Unit Name: Southeast Construction Fill Area (Pile #24 Footprint)
FSSP Number: YNPS-FSSP-00L09-02-00 PREPARATION FOR FSS ACTIVITIES Check marks in the boxes below signify affirmative responses and completion of the action.
1.1 Files have been established for survey unit FSS records. Fl 1.2 ALARA review has been completed for the survey unit. El Refer to YA-REPT-00-003-05 1.3 The survey unit has been turned over for final status survey. El 1.4 An initial DP-8854 walkdown has been performed and a copy of the completed Survey Unit Walkdown Evaluation is in the survey area file. a 1.5 Activities conducted within area since turnover for FSS have been reviewed.
Based on reviewed information, subsequent walkdown: 0 not warranted warranted If warranted, subsequent walkdown has been performed and documented per DP-8854. U OR 1.6 The basis has been provided to and accepted by the FSS Project Manager for not performing a subsequent walkdown.
1.7 A final classification has been performed.
1.8 Classification
CLASS 1 CLASS 2 CLASS 3 DATA QUALITY OBJECTIVES (DQO) 1.0 State the problem:
00L-09-02 is open land area consisting of an approximately 1,123 sq m surface area and at one time contained an accumulation of soil and construction debris as well as discarded components that were generated over the life of the plant. During decommissioning, RSS concrete rubble, as well as material >DCGL were stockpiled within the boundaries of Survey Unit 02. 00L-09-02 contains the footprintlremnants of Pile #24 - consisting of RCA soil and debris as well as RSS (Reactor Support Structures) concrete rubble. Due to the potential impact of the RSSIRCA debris being transported and stored on a portion of 00L Survey Unit 02 is designated as Class 1. The problem as defined by this survey plan is to demonstrate that the years of plant operation and stockpiling of RSS/RCA soils and concrete rubble did not result in an accumulation of plant-related radioactivity that exceeds the release criteria.
The planning team for this effort consists of the FSS Project Manager, FSS Radiological Engineer, FSS Field Supervisor, and FSS Technicians. The FSS Radiological Engineer will make primary decisions with the concurrence of the FSS Project Manager.
2.0 Identify the decision:
Does residual plant-related radioactivity, if present in the survey unit, exceed the release criteria? Alternative actions may include no action, investigation, resurvey, remediation and reclassification.
3.0 Identify the i n ~ u t to s the decision:
DPF-8856.1 Page 1 o f 8
Sample media: Soil Types of measurements: Soil samples, ISOCS Assays and gamma scans Radionuclides-of-concern: co60, c14and H~ 1 DCGL adjusted for the dose contributions fiom sub-HSA data were used to prepare this FSS plan. co60 and cs13' were the only identified LTP nuclides of any consequence.
Since the decommissioning started, concrete rubble that was contaminated with H' and c ' was ~ stored on the ground in this survey unit. This was gathered up, but because of this history, all samples will be sent off site to be analyzed for these two radionuclides. These nuclides were not included in the calculation for SPA-3 measurements because they would not be detectable. Ten extra samples were added to the grid to compensate for the inability to scan for hard to detect radionuclides.
The presence of all LTP-listed radionuclides (gamma-emitters, HTD beta-emitters, and TRUs) in the soil will be evaluated under this survey plan. The YNPS Chemistry Dept. will analyze each FSS soil sample for all LTP-listed gamma-emitting nuclides, exce t Cm2431244 . ln addition, FSS soil samples will be sent to an P
independent laboratory for analyses of H and cI4. TWOsamples or 5% will be analyzed at the off-site laboratory for gamma emitters, HTD beta-emitting radionuclides, and alpha-emitting radionuclides, which will include ~ m ~ ~ ~ ~ ~ ~ ~ .
Survey Design /Release Criteria ClassiJication: Class I Average CO" concentration: 0.0059 pCiIg Standard deviation (106' (a) : 0.02 18 pCi1g Average cs13' concentration: 0.146 pCi1g Standard deviation CS'~'(a): 0.1 57 pCi/g Weighted sum (a): 0.055 LBGR: Initial = 0.5 x DCGL, Adjusted = 0.89 Surrogate DCGL: N/A (a surrogate DCGL will not be used)
Number of Samples: Calculated = 15,25 will be obtained Survey UnitArea: 1,123 m2 DPF-8856.1 Page 2 of 8
1 Grid Area (A/N): 44.9 m2 DCGLbhfC:co6' 2.1 pCi/g (based on AF = 1.5)
DCGLEM.: CsI3" 9.3 pCi/g (based on AF = 3.1)
Investigation Level for soil >DCGLEMcfor either co6', and c s ' j 7 -or-samples: A sum of DCGLEM~ fractions > 1 .O -or-
>DCGL for or co6' and a statistical outlier as defined in the LTP.
- N
- The same criteria will be applied to any other LTP-listed nuclide if identified in the soil samples.
Scan Coverage: 100% of the surface area will be scanned, either by ISOCS or by SPA-3.
ISOCS scans will be on a 4m by 4m grid, to within 2 meters at the edges.
Investigation Level for ISOCS 0.18 pCi/g for co60 measurements: 0.7 pCi/g for
-or- a sum of their fractions > 1 .O
- N
- The investigation levels developed in this manner (in accordance with YA-EVAL-00-001-06) are sensitive enough to detect the DCGLEMc values based on the grid area.
MDCs for ISOCS measurements:
Note: The MDCs listed in the above table are equal to the investigation level for ISOCS measurements. Contact the FSSE if the MDC values in the above table cannot be achieved in a reasonable count time.
SPA-3 Gamma Scan SPA-3 scans will be performed in areas where restricted access prevents Coverage: the use of ISOCS. These scans will cover 100% of the surface area that is not covered by ISOCS scans.
SPA-3 scans will be performed for surface soil within the field-of-view of an ISOCS assay or surrounding a FSS sample location that exceeds the investigation criteria. The SPA-3 scan will cover 100% of the ISOCS assay total field-of-view area (24.6m2) or a 2.8-m radius around the FSS sample location. SPA-3 MDCRs and MDCs are shown in Attachment 1.
Investigation Level for SPA-3 Reproducible indication above background using SPA-3 and audible Scans: discrimination. The expected background range for S P A 3 scans is between 15,000 cpm and 25,000 cpm.
1 Radionuclides for analysis: All LTP nuclides with the focus on C S ' ~co60, ~ , c14and H~
Nuclide 10% - 50% of DCGL (pCi/gJ co60 1.4E 7.OE-0 1
~b~~ 2.5E-0 1 - 1.3E+00
~ g ' ~ ~ 2.5E-01
~ - 1.3E+00
~b~~~ 1.1E+00 - 5.6E+00 CS'~~ 1.7E-0 1 - 8.7E-01 cs1j7 3.OE-0 1 - 1.5+00 EU'~~ 3.6E-0 1 - 1.8E+00 EU'~~ 3.3E 1.7E+00 DPF-8856.1 Page 3 o f 8
EU"~ 1.4E+O1 - 6.9E+0 1 The desired MDCs in the laboratory analyses of FSS soil samples will be the 10% DCGL values. If it is impractical to achieve those, the 50%
DCGL values must be achieved in the laboratory analyses of the FSS soil samples.
MDCs for HTD nuclide: Nuclide 10% - 50% DCGL (pCi/g)
H" 1.3E+O1 - 6.4E+O I c'~ 1.9E 9.7E-0 1
~e~~ I .OE+03 - 5.1 E+03
~i~~ 2.8E+O 1 - 1.4E+02 sr90 6.OE 3.OE-01
~c~~ 5.OE 2.5E+00 pu238 1.2E+00 - 5.8E+00
~u~~~ 1.1 E+00 - 5.3E+00 P U ~ ~ ' 3.4E+O 1 - 1.7E+02 1 .OE+00 - 5.1E+00
~m~~~ 1 .1 E+00 - 5.6E+00 The MDC values for difficult to detect nuclides will be conveyed to the outside laboratory via the sample chain-of-custody form DPF-8823.1 which will accompany the soil samples.
MDCR for SPA-3: The accompanying MDCJMDCR table in Attachment 1 provides MDCR values by various background levels.
MDC @CGL,,,,,,,,J for SPA-3 The accompanying MDCIMDCR table in Attachment 1 provides MDC scans: values by various background levels.
QC checks and measurements: QC checks for ISOCS will be in accordance with DP-8869 and DP-887 1.
QC checks for the Leica GPS will be performed in accordance with DP-8859.
QC checks for the SPA-3 will be performed in accordance with DP-8504.
Two QC split samples will be collected (note: this is in accordance with DP-8852 requirements.)
Two soil sample QC Recounts will be performed by the YNPS Chemistry Lab (note: this is in accordance with DP-8852 requirements.)
4.0 Define the boundaries of the survev:
Boundaries of Survey Unit 00L-09-02 are as shown on the attached map. Survey Unit 02 is not part of the RCA and there are no sub-surface systems that traverse or connect within the survey unit. Survey area OOL-09-02 is bounded by 00L-09-03 to the north, 00L-09-04 to the east; 00L-09-03 to the south and 00L-09-01 to the west.
The survey will be performed under appropriate weather conditions (as defined by instrumentation limitations and human tolerance). Surveys may be performed on any shift of work.
5.0 Develop a decision rule:
Upon review of the FSS data collected under this survey plan:
DPF-8856.1 Page 4 of 8 YNPS-FSSP-00L0902-00
(a) If all the sample data show that the soil concentrations of LTP-listed nuclides are below the 8.73 mremlyear DCGLs and the sum of fractions of LTP-listed nuclides are below unity, then reject the null hypothesis (i.e., Survey Unit 00L-09-02 meets the release criteria).
I (b) lfthe investigation levels are exceeded, then perform an investigation survey.
(c) Lf the average concentration of any LTP-listed nuclide exceeds its respective DCGL, or the average sum of I
fractions of LTP-listed nuclides exceeds unity, & t accept the null hypothesis (i.e., Survey Unit 00L 02 fails to meet the release criteria).
Note: Alternate actions include investigations, reclassification, remediation and resurvey.
6.0 S ~ e c i f vtolerable limits on decision errors:
Null hypothesis: Residual plant-related radioactivity in Survey Unit 00L-09-02 exceeds the release criteria.
I](Probability of type I error: 1 0.05 1 1 1 Probability of type 11 error: 1 0.05 1 11 LBGR:
I 1 The applicable soil (8.73-mremly) DCGL i 2 I LBGR = 0.5 calculated, 0.89 adjusted I
1 7.0 Optimize D e s i ~ o : I 1 Number and Location of Samples: 25 soil samples will be collected at locations based on a random start, I Type of statistical test: WRS Test Sign Test Fl (background will not be subtracted) systematic triangular grid (refer to accompanying DPF-8853.2).
Biased samples: None.
GENERAL INSTRUCTIONS
- 1. Where possible, measurement locations will be identified using GPS in accordance with DP-8859. Each location will be marked to assist in identifying the location. Any locations that are not suitable for soil sampling will be relocated to the nearest suitable location and documented in the field log in accordance with DP-8856.
1 2. Soil samples will be collected in accordance with DP-8 120.
I I 3. Chain of Custody forms will be used in accordance with DP-8123 for all soil samples sent to an off-site laboratory.
- 4. All soil samples will be received and prepared in accordance with DP-8813. N a : Samples to be sent to an off-site lab will not be dried prior to counting on site or shipping.
1 5. Collect ISOCS measurements in accordance with DP-887 1 to provide 100% scan coverage of the survey unit.
I
- 6. Survey instrument: Operation of the E-600 w/SPA-3 will be in accordance with DP-8535 with QC checks performed in accordance with DP-8504. The instrument response checks shall be performed before issue and after use.
- 7. All SPA-3 scans will be performed with the audible feature activated. FSS Technicians will listen for upscale readings to which they will respond by slowing down or stopping the probe to distinguish between random fluctuations in the background and greater than background readings.
I 8. The job hazards associated with the survey described in this package are addressed in the accompanying Job
) 9.
Hazard Assessment (JHA) for 00L-09-02.
All personnel participating in this survey shall be trained in accordance with DP-8868.
II DPF-8856.1 Page 5 of 8
1 SPECIFIC INSTRUCTIONS
- 1. All designated measurement locations will be identified by GPS per DP-8859 or by use of reference points and tape measure as necessary. If a designated sample location is obstructed for any reason, the FSS Radiological Engineer or the FSS Field Supervisor will select an alternate location in accordance with DP-8856. A detailed description of the alternate location will be recorded on form DPF-8856.2, the survey unit map will be annotated appropriately, and the alternate location will be conspicuously marked to facilitate re-visiting to identify and record the coordinates with GPS in accordance with DP-8859 or by measurement from a known reference point when GPS is not available.
- 12. Sample Requirements:
Collect 25 random 2-liter soil samples in accordance with DP-8120. Two of the 25 random soil samples will I1 be analyzed as a QC split sample to fulfill the QC requirement of DP-8852. The same QC split samples will also be analyzed for Hard-to-Detect nuclides in accordance with section 5.6.3.2.1 of the LTP and DP-8856.
Collection of soil samples containing any portion of concrete larger than sample screen require crushing and homogenizing prior to being analyzed. If large concrete debris is observed during sampling process, notify a;deysc,,p\rl: 8 FSS s ervisor or FS n ineer I-+..n ;,,*esur9q ~.i.tYC~*. h . ~C~K~G+C ( r
- U c \I c a h u r k me.+cr\d wi-6 a, Ic~ c l r ~ \ ec4 lo&:o4.
- 3. Soil Sample Designations: CrurL s u d r -he;-\ rJ p L r Gar or -r: *.\I: . y d t ~deb+
FSS soil samples: 00L-09-02-00 1-F through 00L-09-02-025-F corresponding to $SS sample locations 001 through 025.
00L-09-02-001 -F-H through 00L-09-02-025-F-H (excluding 00L 09-013-F-S and 00L-09-02-022-F-S) corresponding to the same 23 samples when analyzed off-site for H~ and c ' ~ . DOnot dry samples prior to sendigg to off-site lab.
I I Biased soil samples: O ~ L - O ~ - O ~ - O U - V -hB o s ~ 3~0 ~h* 0 q - 0 % - 0 % 8 - F - k NmJ. u bmdu. [cde(:nuJ-b cLu)
"l~k QC split samples: O O L - O ~ - O ~ - ~ Iand
~ - F00L-09-02-022-F-S
-S to be designated as QC I II split samples.
Recount samples: 1 OOL-09-02-007-F-RC and 00L-09-02-017-F-RC are to be counted 1 twice on site. The results will be compared in accordance with DP-8864.
Ur a d c,;. 30LA JrL(
- 4. Sample Analysis:
Gamma analysis will be performed on all soil samples packaged in l-liter Marinellis. If any of the gamma analyses show that an investigation level has been exceeded an investigation survey will be conducted at that sample location as directed in specific instruction # 6.
I YNPS Chemistry will analyze 00L-09-02-007-F and 00L-09-02-017-F as a sample recounts.
recounted samples will possess the naming convention 00L-09-02-007-F-RC and 00L-09-02-0 17-F-RC.
On-site gamma analysis of the FSS samples shall achieve the MDC values stated in the DQO section of this plan. The MDCs will be communicated to the laboratory using an attachment to the Chain-of-Custody form.
The off-site laboratory will analyze 00L-09-02-001-F-H through 00L-09-02-025-F-H (excluding OOL-09-02-013-F and 00L-09-02-022-F) for H~ and c ' ~Each . sample will be comprised of at least 500 ml homogenous aliquot of wet soil and prepared in accordance with DP-8813, "Sample Receipt and Preparation."
- N- Ensure that the lid of the container is secured and sealed with electrical tape to prevent loss of moisture during shipping.
DPF-8856.1 Page 6 of 8 YNPS-FSSP-00L0902-00
Note: Renaming the off-site samples is necessary to ensure unique nuclides and HTD (i.e. 00L-09-02-00 1-F-H).
5 . ISOCS Assays:
ISOCS investigation levels are based on specific spacing of ISOCS assays. ISOCS assays, when using the 1 80" collimator at I -meter, are restricted to:
I ( 1) A maximum spacing of 4 meters between assay locations.
I (2) A maximum spacing of 2 meters from any survey unit boundary.
ISOCS assays are designated as 00L-09-02-xxx-F-G where xxx corresponds to the 3-digit location 1I indicated on survey map "ISOCS Scans".
QC checks shall be performed daily in accordance with DP-8869 and DP-8871. Resolve flags encountered prior to survey.
ISOCS assays to be performed with 180' collimator at Im unless otherwise directed by the FSS Engineer.
Make note on the daily survey journal (DPF-8856.2) if other geometries are used.
Designate additional assay locations in continuing sequence from the last number assigned to an FSS measurement. Record detailed information about additional assay locations on the daily survey journal.
If the results on any ISOCS assay exceed an investigation level, investigate the area within the scan grid area for that assay as directed in Specific Instruction # 7.
Remove standing water prior to performance of ISOCS assays. Contact the FSS Engineer for directions if conditions are such that standing water cannot be removed.
- 6. If the results of any FSS sample (statistical andlor biased points) analysis exceed an investigation level, perform a first level investigation as follows:
Note: Detailed descriptions of investigation actions shall be recorded in the daily survey joumal (DPF-8856.2).
1 Review ISOCS data for assays in which the sample requiring investigation may have been in the field of11 I view.
Scan a Im radius footprint around the sample location with a SPA3 in rate-meter mode moving the detector at a speed of 0.25m or less per second, keeping the probe at a distance of approximately 3" from the surface and following a serpentine path that includes at least 3 passes across each square meter. The area of scan should be increased as necessary to bound any areas of elevated activity identified.
N a : Notify FSS Supervisor or FSS Engineer for hrther instructions if Background exceeds 25,000 cpm.
Mark the boundaries around any detected elevated areas in the soil and identify the boundaries on a survey 1I map. Measure the total area of each outlined area in square centimeters.
Mark the location of the highest identified activity for each of the elevated areas in the soil and on the survey map.
I( At each of the highest identified activity areas: 1 Perform and record a I -minute scaler mode SPA-3 measurement. Designate the reading as "00L 02-xxx-F-SC-I" where "xxx" continues sequentially from the last number assigned to an FSS DPF-8856.1 Page 7 of 8 YNPS-FSSP-00L0902-00
n measurement. ( I Obtain a soil sample at the location. Designate the sample as "00L-09-02-xxx-F-I" where "xxx" continues sequentially from the last number assigned to an FSS measurement.
Perform and record a post sample 1-minute SPA-3 measurement. Designate the reading as described above.
1 7. If the results of an ISOCS assay exceed an investigation level, perform a first level investigation as follows:
I 1 N a : Detailed descriptions of investigation actions shall be recorded in the daily survey journal (DPF-8856.2).
Scan the ISOCS footprint with a SPA-3 in rate-meter mode moving the detector at a speed of 0.25m or less I
per second, keeping the probe at a distance of approximately 3" from the surface and following a serpentine path that includes at least 3 passes across each square meter.
I Mark the boundaries around any detected elevated areas in the soil and identify the boundaries on a survey map. Measure the total area of each outlined area in square centimeters.
Mark the location of the highest identified activity for each of the elevated areas in the soil and on the H
survey map.
At each of the highest identified activity areas:
Perform and record a 1-minute scaler mode SPA-3 measurement. Designate the reading as "00L 1I 02-xxx-F-SC-I" where "xxx" continues sequentially from the last number assigned to an FSS measurement.
Obtain a soil sample at the location. Designate the sample as "00L-09-02-xxx-F-I" where "xxx" continues sequentially from the last number assigned to an FSS measurement.
Perform and record a post sample 1-minute SPA-3 measurement. Designate the reading as described above. Re-perform the ISOCS assay.
1 Designate the assay as "00L-09-02-xxx-F-G-I" where "xxx" continues sequentially from the last number assigned to an FSS measurement.
1 NOTIFICATION POINTS:
Date &!IY\O~
Date -
i.. // 4 I
/,
DPF-8856.1 Page 8 of 8
YNPS-FSSP-OOL-09-02-1 Attachment 1 SPA-3 Scan Tables Max Background Scan S ~ e e d BKG(cpm) MDCR M D C ( ~ D C G L ~ InISec
~~) m/Sec BKG (cpni) 4.000 639 3.83E-01 39 1.OO 6,000
YNPS-FSSP-00L-09-02-1 Attachment 2 DCGL MDC Table
Final Status Survey Planning Worksheet Page I of 8 GENERAL SECTION Survey Area No.: 00L-09 I Survey Unit No.: 03 Survey Unit Name: Southeast Construction Fill Area (and Associated Roads)
FSSP Number: YNPS-FSSP-00L-09-03-00 PREPARATION FOR FSS ACTIVITIES Check marks in the boxes below signify affirmative responses and completion of the action.
1.1 Files have been established for survey unit FSS records. 0 1.2 ALARA review has been completed for the survey unit. 0 Refer to YA-REPT-00-003-05 1.3 The survey unit has been turned over for final status survey. El 1.4 An initial DP-8854 walkdown has been performed and a copy of the completed Survey Unit Walkdown Evaluation is in the survey area file. m 1.5 Activities conducted within area since turnover for FSS have been reviewed.
Based on reviewed information, subsequent walkdown: PT not warranted warranted If warranted, subsequent walkdown has been performed and documented per DP-8854.
OR The basis has been provided to and accepted by the FSS Project Manager for not performing a subsequent walkdown. El 1.6 A final classification has been performed.
1.7 Classification
CLASS l CLASS 2 CLASS 3 El DATA QUALITY OBJECTIVES (DQO) 1.0 State the problem:
00L-09-03 is open land area consisting of an approximately 5,217 sq m surface area, including the roadway and buffer zones for the Class 1 survey areas 00L-09-01/00L-09-02. This survey unit is located at the site of the Southeastern Construction Fill Area and includes the haul roads to the SCFA.
During decommissioning, soil, rock and concrete rubble were transported within the boundaries of Survey Unit 03. The problem as defined by this survey plan is to demonstrate that the years of plant operation did not result in an accumulation of plant-related radioactivity that exceeds the release criteria.
The planning team for this effort consists of the FSS Project Manager, FSS Radiological Engineer, FSS Field Supervisor, and FSS Technicians. The FSS Radiological Engineer will make primary decisions with the concurrence of the FSS Project Manager.
2.0 Identifv the decision:
Does residual plant-related radioactivity, if present in the survey unit, exceed the release criteria?
Alternative actions may include no action, investigation, resurvey, remediation and reclassification.
DPF-8856.1 Page 1 of 9
3.0 Identifv the inputs to the decision:
Sample media: Soil Types of measurements: Soil samples and gamma scans Radionuclides-ofconcern:
Characterization data for the 00L-09 area was taken using TSOCS from 5/23/06 through 5130106 -this is the most recent data for the survey area and will be used in this plan. A total of 89 measurements were taken using ISOCS, resulting in one positive measurement for co60 and eight positive measurements for CS"~. All other plant-related radionuclides were <MDA. The results from the characterization data are summarized below:
~ s(8 detects)
' ~ ~ is present in 9% of the characterization samples. The maximum value was <5% of the 8.73-mrem/y ~ s DCGL ' ~of 3.0
~ pCi1g while the average value was 4%.
co60 (1 detect) co60 is present in <2% of the characterization samples. The maximum value was 4 1 % of the 8.73-mremly co60 DCGL of 1.4 pCi/g. Based on only one detect out of 89 locations, Co-60 is not considered to be a nuclide of concern.
FSS Sample data from adjacent survey units 00L-09-01, 00L-09-02 and 00L-09-05 was alsc reviewed. The FSS data showed lower average and maximum values than the characterization data wit1 both Co-60 and Cs-137 being detected in <3% of all samples at levels <4% of respective DCGL's.
Applicable DCGL: The DCGLs applied under this survey plan correspond to annual doses of 8.73 m r e d y (the 10-mrernly DCGL adjusted for the dose contributions from sub-surface concrete structures and tritium in ground water).
1 I
1 DCGL I Nuclide 1 DCGL I DCGL The presence of all LTP-listed radionuclides (gamma-emitters, HTD beta-emitters, and TRUs) in the so will be evaluated under this survey plan. The YNPS Chemistry Dept. will analyze each FSS soil sampl for all LTP-listed gamma-emitting nuclides, except Cm2431244 . In addition, 5% of FSS soil samples will 1:
sent to an independent laboratory for analyses of gamma-emitters, HTD beta-emitting radionuclides, an alpha-emitting radionuclides, which will include Cm 2431244 .
Survey Design /Release Criteria ClassiJication: Class 3 Average cst3' concentration: 0.0865 pCi1g Standard deviation CS'~'(a): 0.0327 pCi/g DPF-8856.1 Page 2 o f 9
3.0 pCilg Surrogate DCGL: NIA (a surrogate DCGL will not be used)
LBGR: 2.9346 (Initial LBGR: 0.5 x DCGL Cs137)
Number of Samples: Calculated = 15 Survey Unit Area: 5,217 m2 Grid Area (A/N) NIA (Class 3)
Investigation Level for soil >50% of DCGL for any LTP listed nuclide.
samples:
SPA3 Gamma Scan SPA-3 scans will be performed, as directed by the FSSE, for surface soil Coverage: within the field-of-view of an ISOCS assay or surrounding a FSS sample location that exceeds the investigation criteria. The SPA-3 scan will cover 100% of the ISOCS assay total field-of-view area or a 1-m radius around the FSS sample location. S P A 3 MDCRs and MDCs are shown in Attachment 1.
Investigation Level for SPA-3 Reproducible indication above background using S P A 3 and audible Scans: discrimination. The expected background range for SPA-3 scans is between 15,000 cpm and 20,000 cpm.
Radionuclides for analysis: All LTP listed plant related nuclides.
ISOCS Scan Coverage: Approximately 10% of the surface area of the survey unit will be scanned using ISOCS. Scans will be judgmentally biased to the roadways and boundaries of Class 1 survey units.
Investigarion Level for ISOCS: All positive results for plant-related radionuclides.
MDCs for ISOCS ISOCS scan MDCs for 10-minute measurements in Class 2 and 3 survey measurements: units meet or exceed the scan MDC criteria defined in the ISOCS technical basis.
MDCs for gamma analysis of Nuclide 10% - 50% of DCGL (pCi/g) soil samples: co60 -
1.4E-0 1 7.OE-0 1
~b~~ 2.5E 1.3E+00
~ g ' ~ ~ - 1.3E+00
~ 2.5E-01
~ b " ~ 1.1 E+00 - 5.6E+00 csI3j 1.7E-0 1 - 8.7E-0 1 CS'~~ 3.OE 1.5E+00 EU"~ 3.6E 1.8E+00 EU' '" 3.3E 1.7E+00 EU'~~ 1.4E+OI - 6.9E+O1 The desired MDCs in the laboratory analyses of FSS soil samples will be the 10% DCGL values. If it is impractical to achieve those, the 50%
DCGL values must be achieved in the laboratory analyses of the FSS soil samples.
MDCs for HTD nuclide: Nuclide 10% - 50% DCGL (~Ci/g)
H~ 1.3E+01 - 6.4E+01 c'~ 1.9E 9.7E-01 1.OE+03 - 5.1E+03
~ i ' ~ 2.8E+01 - 1.4E+02 s?O -
6.OE-02 3.OE-01
~c~~ -
5.OE-01 2.5E+00
~u~~~ 1.2E+00 - 5.8E+00
~u~~~ 1.1E+00 - 5.3E+00 3.4E+OI - 1.7E+02 DPF-8856.1 Page 3 of 9
The MDC values for difficult to detect nuclides will be conveyed to the outside laboratory via the sample chain-of-custody form DPF-8823.1 which will accompany the soil samples.
MDCR for SPA-3: The accompanying MDCJMDCR table in Attachment 1 provides MDCR values by various background levels.
MDCCfDCGL)for SPA-3 The accompanying MCDR/MDC table in Attachment 1 provides MDC scans: values, as a fraction of DCGL, by various background levels.
@: Any radiation levels detected above background in a Class 3 survey unit should be investigated. A Class 3 survey unit is expected to have minimal contamination and not expected to have any hot spots.
MARSSIM recommends scanning in a Class 3 survey unit be performed to verify proper classification. Scan MDC is not tied to the DCGLw in a Class 3 survey area and therefore scanning to levels above background is a measure of due-diligence on the appropriateness of the classification.
(htt~://www.orau.nov/ddsc/exuert/answers/marssim.h question/answer dated 2/4/2003)
QC checks and measurements: QC checks for ISOCS will be in accordance with DP-8869 and DP-8871.
QC checks for the Leica GPS will be performed in accordance with DP-8859.
QC checks for the SPA-3 will be performed in accordance with DP-8504.
One QC split sample will be collected (note: this is in accordance with DP-8852 requirements).
YNPS Chemistry Lab will perform a QC Recount on at least one soil sample (note: this is in accordance with DP-8852 requirements).
4.0 Define the boundaries of the survey:
Boundaries of Survey Unit 00L-09-03 are as shown on the attached map. Survey Unit 03 is not part of the RCA and there are no sub-surface systems that traverse or connect within the survey unit. Survey area 00L-09 is bounded by 00L-08-03 on the north, 00L-10-02 and 00L-11-02 to the west, 00L 04 to the east and Wheeler Brook to the south. There are no plant-related structures present in 00L 03. Due to low potential impact - 00L-09-03 meets the criteria for a Class 3 survey area.
The survey will be performed under appropriate weather conditions (as defined by instrumentation limitations and human tolerance). Surveys may be performed on any shift of work.
5.0 Develop a decision rule:
Upon review of the FSS data collected under this survey plan:
(a) Zf all the sample data show that the soil concentrations of LTP-listed nuclides are below the 8.73 mremlyear DCGLs and the sum of fractions of LTP-listed nuclides are below unity, then reject the null hypothesis (i.e., Survey Unit 00L-09-03 meets the release criteria).
(b) Lfthe investigation levels are exceeded, perform an investigation survey.
(c) If the average concentration of any LTP-listed nuclide exceeds its respective DCGL, or the average sum of fractions of LTP-listed nuclides exceeds unity, then accept the null hypothesis (i.e., Survey DPF-8856.1 Page 4 of 9
Unit 00L-09-03 fails to meet the release criteria).
NI:- Alternate actions include investigations, reclassification, remediation and resurvey.
I/
6.0 Specifv tolerable limits on decision errors:
Null hypothesis: Residual plant-related radioactivity in Survey Unit 00L-09-03 exceeds the release criteria.
Probability of type I error: 0.05 J
Probability of type ]I error: 0.05 LBGR: LBGR = 2.9346 (adjusted) 7.0 Optimize Desipn:
Type of statistical test: WRS Test Sign Test Fl (background will not be subtracted)
Number and Location of Samples: 15 soil samples will be collected in randomly selected locations (refer to accompanying DPF-8853.1).
Biased samples: A minimum of 4 biased samples will be collected at the approximated locations shown on the sample map. These samples are designated as biased by adding the letter "B" to the sample number. The coordinates of the biased sample locations will be determined and added to the record.
1 Based sample locations: I One biased sample to be taken at the edge of survey unit 01 where it abuts survey unit 03 (in the roadway leading into to Pile #24).
I One biased sample to be taken at the edge of survey unit 02 where it abuts survey unit 03 (in the roadway leading into Piles # 1511152).
One biased sample to be taken in the travel path of the truck route used to dump the materials into the R
piles.
1 One biased sample to be taken at the southern edge of the survey unit nearest Wheeler Brook.
I I . Where possible, measurement locations will be identified using GPS in accordance with DP-8859. Each I location will be marked to assist in identifying the location. Any locations that are not suitable for soil sampling will be relocated to the nearest suitable location and documented in the field log in accordance with DP-8856.
- 2. Soil samples will be collected in accordance with DP-8 120.
- 3. Chain-of-Custody form will be used in accordance with DP-8123 for all soil samples sent to an off-site laboratory. The required MDCs for the analyses performed by the off-site laboratory will be communicated to the Lab via an attachment to the Chain-of-Custody form.
- 4. All soil samples will be received and prepared in accordance with DP-8813. m: Split samples to be sent to an off-site lab will not be dried prior to counting on site or shipping.
(( 5. Collect ISOCS measurements in accordance with DP-887 1 to provide 10% scan coverage of the survey U DPF-8856.1 Page 5 of 9
unit.
- 6. Survey instrument: Operation of the E-600 w/SPA-3 will be in accordance with DP-8535 with QC checks performed in accordance with DP-8504. The instrument response checks shall be performed before issue and after use.
I
- 7. All SPA-3 scans will be performed with the audible feature activated. FSS Technicians will listen for upscale readings to which they will respond by slowing down or stopping the probe to distinguish u
between random fluctuations in the background and greater than background readings.
Y 8. The job hazards associated with the survey described in this package are addressed in the accompanying Job Hazard Assessment (JHA) for 00L-09-03.
- 9. All personnel participating in this survey shall be trained in accordance with DP-8868.
SPECIFIC INSTRUCTIONS J
- 1. All designated measurement locations will be identified by GPS per DP-8859 or by use of reference points and tape measure as necessary. If a designated sample location is obstructed for any reason, the FSS Radiological Engineer or the FSS Field Supervisor will select an alternate location in accordance with DP-8856. A detailed description of the alternate location will be recorded on form DPF-8856.2, the survey unit map will be annotated appropriately, and the alternate location will be conspicuously marked to facilitate re-visiting to identify and record the coordinates with GPS in accordance with DP-8859 or by measurement from a known reference point when GPS is not available.
I 2. Sample Requirements:
Collect 15 random and 4 biased 1 -liter soil samples in accordance with DP-8 120. One of the 15 random l
soil samples will be analyzed as a QC split sample to fulfill the QC requirement of DP-8852. The same QC split sample will also be analyzed for Hard-to-Detect nuclides in accordance with section 5.6.3.2.1 of the LTP and DP-8856.
I
- 3. Soil Sample Designations:
1 FSS soil samples: 00L-09-03-001 -F through 00L-09-03-015-F corresponding to FSS sample locations 001 through 0 15.
Biased soil samples: 00L-09-03-016-F-B through 00L-09-03-0 19-F-B corresponding to biased sample locations 016 through 019.
00L-09-03-016-F-B to be taken at the southern edge of survey unit 01 where it abuts survey unit 03 (in the roadway leading into to Pile #24).
00L-09-03-017-F-B to be taken at the southern edge of survey unit 02 where it abuts survey unit 03 (in the roadway leading into Piles # 151/152).
00L-09-03-018-F-B to be taken in the travel path of the truck route used to dump the materials into the piles.
1 I 00L-09-03-019-F-B to be taken at the southern edge of the I 1 !I survey unit nearest Wheeler Brook. I QC split samples: / 00L-09-03-013-F-S to be designated as QC split sample.
Recount samples: 00L-09-03-012-F-RC is to be counted twice on site. The results will be compared in accordance with DP-8864.
DPF-8856.1 Page 6 of 9
- 4. Sample Analysis:
I Gamma analysis will be performed on all soil samples. If any of the gamma analyses show that an investigation level has been exceeded an investigation survey will be conducted at that sample location per Specific Instruction #7.
YNPS Chemistry will analyze 00L-09-03-001-F through 00L-09-03-015-F and 00L-09-03-016-F-B through 00L-09-03-019-F-£3for gamma-emitting nuclides.
YNPS Chemistry will analyze 00L-09-03-013-F-S for gamma-emitting nuclides prior to being sent R
to the off-site laboratory. This sample will be analyzed for gamma-emitting nuclides and HTD at the off-site laboratory. Ensure that the lid to the I-liter Marinelli container is secured and sealed with electrical tape to prevent loss of moisture during shipping.
YNPS Chemistry will analyze 00L-09-03-012-F as a sample recount. The recounted sample will possess the naming convention 00L-09-03-0 12-F-RC.
On-site gamma analysis of the FSS samples shall achieve the MDC values stated in the DQO section of this plan. The MDCs will be communicated to the laboratory using an attachment to the Chain-of-Custody form.
- 5. ISOCS Assays:
I Collect ISOCS assays in accordance with DP-887 I to provide 10% scan coverage of the survey unit.
ISOCS assays are designated as 00L-09-03-xxx-F-G where xxx corresponds to the 3-digit location 1I indicated on survey map "ISOCS Scans # 1".
QC checks shall be performed at daily in accordance with DP-8869 and DP-8871. Resolve flags encountered prior to survey.
ISOCS assays to be performed with 90' collimator at 2m unless otherwise directed by the FSS Engineer. Make note on the daily survey journal (DPF-8856.2) if other geometries are used.
Remove standing water prior to performance of ISOCS assays. Contact the FSS Engineer for directions if conditions are such that standing water cannot be removed.
Make note of any conditions within the ISOCS field of view that may affect analysis of ISOCS assay data such as mud, concrete, etc.
Designate additional assay locations in continuing sequence from the last number assigned to an FSS I
measurement. Record detailed information about additional assay locations on the daily survey journal.
If the results on any ISOCS assay exceed the investigation level (any positive indication of for plant-related radionuclides), investigate that assay as directed in Specific Instruction # 8.
- 6. SPA-3 Scans 11 FSS Technicians will perform scans by moving the SPA3 detector at a speed 5 0.25 m/s, keeping the probe at a distance of less than 3 inches from the ground surface, and following a serpentine pattern that includes at least 3 passes across each square meter. When scanning and walking, a slow pace (i.e., 1 step per second) shall be used. Scanning will be performed in the rate-meter mode with the audible feature on. Surveyors will listen for upscale readings, to which they will respond by slowing down or stopping the probe to distinguish between random fluctuations in the background and greater than background readings. Location(s) where detectable-above-background scan readings are found will be investigated.
DPF-8856. I Page 7 of 9
- 7. Soil Sample Investigations:
R If any soil samples exceed investigation criteria (0.5 x DCGL,), an investigation will be performed.
If it becomes necessary to investigate soil samples, this FSSP will be revised to include direction.
- 8. ISOCS Investigations If the results of an ISOCS assay exceed an investigation level, perform a first level investigation as follows:
m: Detailed descriptions of investigation actions shall be recorded in the daily survey journal (DPF-8856.2).
I Perform ISOCS scan measurements at each investigation location as follows:
I o Perform ISOCS scans at Im height with 90' collimation o Perform ISOCS scans at 5 locations within a 4-m grid centered over the original ISOCS scan location - One centered over the original scan location and one in each corner of the grid centered at 1.4 m from the center of the grid. ISOCS Scan Investigation Map # 1 shows the proper positioning for ISOCS investigation scans.
o Identify investigation ISOCS scans using the convention: NOL-03-02-xxx-F-G-I, where xxx indicates the next sequential location number starting with 300 (i.e. the first investigation ISOCS scan performed will be NOL-03-02-300-F-G-I).
o Indicate any observations in the daily survey journal. Locations of ISOCS scans should be recorded by use of GPS when available.
The FSSE will review investigation ISOCS scans and will direct performance of SPA-3 scans as set forth in the following steps. Note: The FSSE may direct performance of additional investigation surveys or terminate steps by use of memo that will be inserted in the survey package file.
Scan the ISOCS area of evaluation footprint with a SPA-3 in rate-meter mode moving the detector at a speed of 0.25m or less per second, keeping the probe at a distance of approximately 3" from the surface and following a serpentine path that includes at least 3 passes across each square meter.
Mark the boundaries around any detected elevated areas in the soil and identify the boundaries on a survey map. Measure the total area of each outlined area in square centimeters.
I Mark the boundaries around any detected elevated areas in the soil and identify the boundaries on a survey map. Measure the total area of each outlined area in square centimeters.
U Mark the location of the highest identified activity for each of the elevated areas in the soil and on the survey map.
As directed by the FSSE, at each of the highest identified activity areas:
Obtain a soil sample at the location. Designate the sample as "00L-09-03-xxx-F-I" where "xxx" continues sequentially from the last number assigned to an FSS measurement.
Perform and record a post sample I-minute SPA-3 measurement. Designate the reading as described above.
I Re-perform the ISOCS assay. Designate the assay as "00L-09-03-xxx-F-G-I" where "xxx" J continues sequentially from the last number assigned to an FSS measurement.
DPF-8856.1 Page 8 of 9
Date '71fi10 (/
Date , 113y/o DPF-8856.1 Page 9 of 9
YNPS-FSSP-00L-09-03-00 Attachment 1 SPA-3 Scan Tables Max Background
Y NPS-FSSP-OOL-09-03-00 Attachment 2 DCGL MDC Table
GENERAL SECTION Survey Area No.: 00L-09 Survey Unit No.: 04 Survey Unit Name: SCFA Surrounds FSSP NO.: YNPS-FSSP-00L-09-04-00 PREPARATION FOR FSS ACTIVITIES Check marks in the boxes below signify affirmative responses and completion of the action.
1.1 Files have been established for survey unit FSS records. X 1.2 ALARA review has been completed for the survey unit. X 1.3 The survey unit has been turned over for fmal status survey. X 1.4 An initial DP-5554 walk down has been performed and a copy of the completed Survey Unit Walk down Evaluation is in the survey area file. X 1.5 Activities conducted within area since turnover for FSS have been reviewed. X Based on reviewed information, subsequent walk down: X not warranted warranted If warranted, subsequent walk down has been performed and documented per DP-8854.
OR The basis has been provided to and accepted by the FSS Project Manager for not performing a subsequent walk down.
1.6 A final classification has been performed. X Classification: Class 3 DATA QUALITY OBJECTIVES (DQO) 1.0 State the problem:
Define the problem so that the focus of the survey will be unambiguous.
Members of the planning team: FSS Project manager, Radiological Engineer, Field Supervisor, and Technicians.
Primary decision rnaker/method: FSS Radiological Engineer with concurrence of the FSS Project Manager.
Available resources/deadlines: NIA Concise description ofproblem: Release of 00L-09-04 to demonstrate compliance with YNPS LTP release criterion.
2.0 Identifv the decision:
Define the question that the survey will attempt to resolve and identify alternative actions that may be taken based on the outcome of the survey.
Principal study question: Is the residual radioactivity in 00L-09-04 below the 8.73 mrlyr release criterion'?
Alternative actions: If residual radioactivity in 00L-09-04 exceeds the 8.73 mdyr release criterion, investigations will be performed, potentially resulting in remediation, reclassification or resurveys.
Decision staternent: Determine whether or not 00L-09-04 satisfies the 8.73 mrlyr release criterion.
3.0 Identifv the inputs to the decision:
Informational inputs needed to resolve the decision statement and environmental variables that will be measured.
Sources of information: 8 samples from historical data was sufficient to develop the DQOs for 00L-09-04.
15 new data measurements will be acquired to support DQAs.
Direct measurement technique: Soil samples will be collected and analyzed on site for all ETD LTP listed radionucluides, 1 sample will be sent to an independent lab for analyses of all LTP listed radionuclides.
Scan measurement technique: Surfaces will be scanned via a SPA-3 probe.
Sample matrix: Soil Radionuclide(s) of concern: Based on a review of YNPS historical data, the following radionuclides are the only facility related radionuclides of concern: Cs- 137 Sample Quantity 15 (calculated) + 0 (added), for a total of 15 samples. (+1 QC)
Gridded Sample Area Size NIA (Class 3)
Sample Grid Spacing: No Grid DPF-8856.1 Page 1 of 5
.Survey Area No.: 00L-09 Survey Unit No.: 04 5
Survey Unit Name: SCFA Surrounds FSSP NO.: YNPS-FSSP-00L-09-04-00 Detection Limits: For direct measurements and sample analyses, Minimum Detectable Concentrations (MDCs) less than 10% of the DCGL are prefered , while iMDCs up to 50% of the DCGL are acceptable. See Attachment 2 for MDC Table.
MDC CfDCGL): The accompanying MDCRMDC table in Attachment 1 provides MDC values, as a fraction of DCGL, for various background levels.
MD CR(suweyor) .. The accompanying MDCRIMDC table in Attachment 1 provides MDCR values for various background levels.
Background Measurements: No reference area (background) measurements are required, the Sign Test will be used.
Release criteria DCGL based on: 8.73 rndyr for Soil. See Attachment 2 for radionuclide specific breakdown of DCGLs.
4.0 Define the boundaries of the survey:
Define the spatial and temporal boundaries that will be covered by the decision statement so data can be easily interpreted.
Temporal boundaries: The data are used to reflect the condition of radionuclides leaching into the ground water over a period of 1,000 years. The survey may be performed under appropriate weather conditions (as defined by instrument tolerance and personnel safety) on any shift of work.
Spatial Boundaries: YNPS has been divided into multiple survey areas and units with relatively homogeneous characteristics based on information collected during the years of facility operation, the HSA, and post remediation activities. The area of interest has been named 00L-09, and the survey unit is 04. The medium of interest is described as Soil. The radiological characteristics of this unit classify it as a Class 3 area.
Which has no restrictions as a surface area limit. The total surface area is 7186.7 m2, which is in compliance with the no restrictions limit. The maximum length is 124m, and the maximum width is 93.3m. Soil is surveyed to a depth of 15 cm.
See included GPS coordinates and maps that demonstrate the measurement locations, the survey unit boundaries and unit relationship to site.
Detailed description of unit: 00L-09-04 is open land area consisting of an approximately 7,186.7 sq m surface area forming a buffer zone for the Class 1 survey units 00L-09-01 and 00L-09-05.
Survey unit 00L-09-04 shares a boundary with 00L-09-03. Survey unit 04 is not part of the RCA and there are no sub-surface systems that traverse or connect within the survey unit. There are no plant-related structures present in this survey unit. Due to low potential impact - 00L-09-04 meets the criteria for a Class 3 survey area.
5.0 Develop a decision rule:
Define the parameter of interest, specify action levels, and the DCGL.
Investigation Levels: If an investigation level below is exceeded, then perform an investigation survey.
Direct measurements: > 50% DCGLw Scan measurements: Detectable over background Parameter of interest: If there are no investigation issues, and the the residual radioactivity in 00L-09-04 systematic samples is less than the DCGLw then the survey unit is in compliance with the release criterion (8.73 mriyr).
Critical Value: If the average concentration is less than DCGLw, the sum of fractions is less than 1, and less than 4 of the 15 samples are above the DCGLw, the Survey Units passes.
DPF-8856.1 Page 2 of 5
5 Survey Area No.: 00L-09 Survey Unit No.: 04 Survey Unit Name: SCFA Surrounds FSSP NO.: YNPS-FSSP-00L-09-04-00 6.0 Specify limits on decision errors:
Specify the decision maker's limits on decision errors, used to establish performance goals for the data collection design.
Null Hypothesis (H o): The residual radioactivity in the survey unit data is greater than the DCGLw Alternative Hypothesis ( H ,): The residual radioactivity in the survey unit data is less than the DCGLw Tolerance for Error: Type I Error: 0.05 (probability of rejecting the null hypothesis when it is true.)
Type I1 Error: 0.05 (probability of accepting the null hypothesis when it is false.)
DCGLw: 3 (~cilg)
LBGR; 2.9346 (Initial LBGR: 1.5)
Relative shlft ( M a ) : 2 Sigma ( a ) : 0.0327 Power of survey design: See attachment for prospective power curve.
7.0 Optimize Design:
Type of statistical test: WRS Test Sign Test X (background will not be subtracted)
Design optimization is included in the DQO process, and reflected in the data published in this plan.
Number & Location of Samples: 15 Soil samples will be collected at locations based on random and judgmental locatons (refer to accompanying DPF-8853.2). See map for specific locations.
GENERAL INSTRUCTIONS 1 Where possible, measurement locations will be identified using GPS in accordance with DP-8859. Each location will be marked to assist in identifying the location.
2 Soil samples will be collected in accordance with DP-8120.
3 Chain of Custody form will be used in accordance with DP-8123 for all soil samples sent to an off-site laboratory.
4 All soil samples will be received and prepared in accordance with DP-8813. Note: Split samples to be sent to an off-site lab will not be dried prior to counting on site or shipping.
5 Survey instrument: Operation of the E-600 w/SPA-3 will be in accordance with DP-8535 with QC checks performed in accordance with DP-8504. The instrument response checks shall be performed before issue and after use.
6 All SPA-3 scans will be performed with the audible feature activated. Listen for upscale readings and respond by slowing down or stopping the probe to distinguish between random fluctuations in the background and greater than background readings. Investigate any reproducible upscale readings as described in the specific inshuctions.
7 The job hazards associated with the survey described in this package are addressed in the accompanying Job Hazard Assessment (JHA) for 00L-09-04.
8 All personnel participating in this survey shall be trained in accordance with DP-8868.
SPECIFIC INSTRUCTIONS 1 SPA-3 Scans:
Move the SPA-3 in rate-meter mode at a speed of 0.25m or less per second, keeping the probe at a distance of 5 3" from the surface and following a serpentine path that includes at least 3 passes across each square meter.
Scan the lm2 area surrounding each sample point prior to collecting a sample.
Perform 72 biased scans l m wide by 10m long. Perform scans 2m wide the entire length of the western bqundary.
2 Scan Investigations: an x / 2ZX.l= dpra)c;fnc/~ JY8 u ) 3 ~
Note: Detailed descriptions of investigation actions shall be recorded in the daily survey journal (DPF-8856.2) and Scan a l m radius footprint around the investigation location in accordance with the scan requirements above. The area of scan should be increased as necessary to bound any areas of elevated activity identified. Perform a sample investigation as noted below. I DPF-8856.1 Page 3 of 5
K d Survey Area No.: 00L-09 Survey Unit No.: 04 Survey Unit Name: SCFA Surrounds FSSP NO.: YNPS-FSSP-00L-09-04-00 3 Sample Locations:
All designated measurement locations will be identified by GPS per DP-8859 or by use of reference points, tape measure and compass as necessary. If a designated sample location is obstructed for any reason, the FSS Radiological Engineer or the FSS Field Supervisor will select an alternate location in accordance with DP-8856. A detailed description of the alternate location will be recorded on form DPF-8856.2, the survey unit map will be annotated appropriately, and the alternate location will be conspicuously marked to facilitate re-visiting to identify and record the coordinates with GPS in accordance with DP-8859 or by measurement from a known reference point when a GPS is not available.
4 Sample Requirements: Collect 15 samples in accordance with DP-8 120. 1 of the 15 samples will be analyzed as a QC split sample to fulfill the QC requirement of DP-8852. The same QC split sample will be analyzed for HTD nuclides in accordance with section 5.6.3.2.1 of the LTP and DP-8856.
Biased samples: No biased samples will be collected.
5 Sample Designation:
FSS soil samples: 00L-09-04-00 1-F through 00L-09-04-0 15-F corresponding to FSS sample locations 00 1 through 0 15.
Biased soil samples: No biased samples will be collected.
QC split samples: 00L-09-04-004-F-S to be designated as QC split sample. This sample will be sent to an off-site laboratory (Do not dry).
Recount samples: 00L-09-04-0 15-F-RC is to be counted twice on site. The results will be compared in accordance with DP-8864.
6 Sample Analysis:
Gamma analysis will be performed on all soil samples. If any of the gamma analyses show that an investigation level has been exceeded an investigation survey will be conducted at that sample location as directed by the radiological engineer.
YNPS Chemistry will analyze 00L-09-04-001-F through 00L-09-04-015-F for gamma-emitting nuclides.
YPNS Chemistry will analyze 00L-09-04-015-F as a sample recount. The recounted sample will possess the naming convention 00L-09-04-0 15-F-RC.
YNPS Chemistry will analyze 00L-09-04-004-F-S for gamma-emitting nuclides prior to being sent to the off-site laboratory. This sample will be analyzed for gamma-emitting nuclides and HTD at the off-site laboratory.
All gamma analysis of the FSS samples shall achieve the MDC values stated in the DQO section of this plan. The MDC's will be communicated to the laboratory using an attachment to the Chain-of-Custody form.
DPF-8856.1 Page 4 of 5
I Survey Area No.: 00L-09 Survey Unit No.: 04 Survey Unit Name: SCFA Surrounds FSSP NO.: YNPS-FSSP-00L-09-04-00 July 10,2006 Date 7 /7 1
r A ?,&J(!,
Approved by Martin Erickson m, FSS ~rojdctManag
(' Date 7,/>!7/nc.
DPF-8856.1 Page 5 of 5
YNPS-FSSP-OOL-09-04-00 Attachment 1 SPA-3 Scan Tables Max Backaround
YNPS-FSSP-OOL-09-04-00 Attachment 2 DCGL MDC Table
~
Final Status Survey Planning Worksheet Page 1 of 8 1.1 Files have been established for survey unit FSS records. IZl 1.2 ALARA review has been completed for the survey unit. IZl Refer to YA-REPT-00-003-05 1.3 The survey unit has been turned over for final status survey. IZl 1.4 An initial DP-8854 walkdown has been performed and a copy of the completed Survey Unit Walkdown Evaluation is in the survey area file. a 1.5 Activities conducted within area since turnover for FSS have been reviewed.
Based on reviewed information, subsequent walkdown: not warranted warranted If warranted, subsequent walkdown has been performed and documented per DP-8854.
OR The basis has been provided to and accepted by the FSS Project Manager for not performing a subsequent walkdown.
1.6 A final classification has been performed.
1.7 Classification
CLASS 1 O CLASS 2 CLASS 3 DATA QUALITY OBJECTIVES (DQO) 1.0 State the problem:
00L-09-05 is open land area consisting of an approximately 735.6 sq m surface area, and at one time contained an accumulation of soil and construction debris. During decommissioning, soil, rock and concrete rubble were stockpiled within the boundaries of Survey Unit 05. 00L-09-05 contains the footprint of Piles #15 11152 - consisting of soil, rock and concrete rubble debris from excavations of the East Storm Drain, Mt. Herdon, the Service Building and the Alleyway (all within the RCA). Due to the potential impact of the RCA excavation material being transported and stored on a portion of 00L Survey Unit 05 is designated as a Class 1 area. The problem as defined by this survey plan is to demonstrate that the years of plant operation and stockpiling of soil, rock and concrete rubble did not result in an accumulation of plant-related radioactivity that exceeds the release criteria.
The planning team for this effort consists of the FSS Project Manager, FSS Radiological Engineer, FSS Field Supervisor, and FSS Technicians. The FSS Radiological Engineer will make primary decisions with the concurrence of the FSS Project Manager.
2.0 Identify the decision:
Does residual plant-related radioactivity, if present in the survey unit, exceed the release criteria?
Alternative actions may include no action, investigation, resurvey, remediation and reclassification.
3.0 Identify the inputs to the decision:
DPF-8856.1 gq1 ,,lbk Page 1 of,Y 9
Sample media: Soil Types of measurements: Soil samples, ISOCS Assays and gamma scans Radionuclides-of-concern: C S ' ~ ~
concrete structures and tritium in ground csn4 1.7E+00 c14 1.9E+00 puZ4l 3.4E+02 C S ' ~ ~ 3 .OE+OO ~e~~ 1 .OE+04 ~ m ' ~ ' 1 .OE+O1
~i~~ 2.8E+02 ~m~~~~~~ l.lE+Ol Ten characterization samples were collected in the footprint of Piles # 1511152. Based on a review of the characterization data, plant-related radionuclide C S ' was ~ ~ positively identified in 40% of the samples. All other plant-related radionuclides were CMDA. The results from the characterization data are summarized below:
~s~~~(4 detects) C S " ~is present in 40% of the characterization samples. The maximum value was <5% of the 8.73-mremly C S ' ~DCGL ~ of 3.0 pCiIg while the average value was <2%.
The presence of all LTP-listed radionuclides (gamma-emitters, HTD beta-emitters, and TRUs) in the soil will be evaluated under this survey plan. The YNPS Chemistry Dept. will analyze each FSS soil sample for all LTP-listed gamma-emitting nuclides, except Cm243R44. In addition, FSS soil samples will be sent to an independent laboratory for analyses of gamma-emitters, HTD beta-emitting radionuclides, and alpha-emitting radionuclides, which will include Cm2431244.
Survey Design /Release Criteria Classijcation: Class 1 Average ~s~~~concentration: 0.05 pCi/g Standard deviation csI3' (a): 0.03 pCi/g DCGL: 3.0 pCi/g Surrogate DCGL: NIA (a surrogate DCGL will not be used)
LBGR Initial = O.5xDCGL; Adjusted = 2.9 Number of Samples Calculated = 15,20 will be obtained Survey Unit Area 735.6 m2 Grid Area (A/N) 36.78 m2 Sample Spacing (M.866N) 6.52 m (Triangular)
D C G L E ~CS"~
- 9.3 pCi/g (based on AF = 3.1)
Investigation Level for soil >DCGLEMcfor ~ s -or-' ~ ~
samples: A sum of DCGLEMcfractions > 1.0 -or-
>DCGL for csI3' and a statistical outlier as defined in the LTP.
- N
- The same criteria will be applied to any other LTP-listed nuclide if identified in the soil samples.
ISOCS Assay Coverage: 100% of the ISOCS accessible surface area, ensured by overlapping field-of-views (based on a 4-meter grid pattern) using ISOCS in the Im-detector height with 180° open collimation configuration.
Investigation Level for ISOCS 0.7 pCiIg for ~ s ' ~ ~
measurements: 0.1 8 pCi/g for co60 m: The investigation levels developed in this manner (in accordance with YA-EVAL-00-001-06) are sensitive enough to detect the DCGLE~c values based on the grid area. The same criteria will be applied to any other LTP-listed nuclide if identified in the soil samples.
MDCs for ISOCS measurements:
Note: The MDCs listed in the above table are equal to the investigation level for ISOCS measurements. Contact the FSSE if the MDC values in the above table cannot be achieved in a reasonable SPA-3 Gamma Scan SPA-3 scans will be performed in areas where restricted access prevents Coverage: the use of ISOCS. These scans will cover 100% of the surface area that is not covered by ISOCS scans.
SPA3 scans will also be performed on surface soil within the area of evaluation of an ISOCS assay or surrounding a FSS sample location that exceeds the investigation criteria. The SPA3 scan will cover 100% of the ISOCS assay area of evaluation (24.6m2)or a 1-m radius around the FSS sample location (3.14m2). SPA3 MDCRs and MDCs are shown in Attachment 1.
Investigation Level for SPA-3 Reproducible indication above background using SPA3 and audible Scans: discrimination. The expected background range for SPA3 scans is between 15,000cpm and 20,000 cpm.
Radionuclidesfor analysis: All LTP nuclides with the focus on cs13'.
MDCs for gamma analysis of Nuclide 10% - 50% of DCGL (pCi/n) soil samples: co60 1.4E 7.OE-0 1
~b~~ 2.5E 1.3E+00
~ g l ~ ~ 2.5E-01
~ - 1.3E+00 sbI2' 1.1E+00 - 5.6E+00 CS'~~ 1.7E 8.7E-0 1 csI3' 3.OE 1.5E+00 EU '2 3.6E-0 1 - 1.8E+00 EU"~ 3.3E-0 1 - 1.7E+00 EU " 1.4E+01 - 6.9E+Ol DPF-8856.1 f,l,,\Oj, Page 3 off 9
The desired MDCs in the laboratory analyses of FSS soil samples will be the 10% DCGL values. If it is impractical to achieve those, the 50%
DCGL values must be achieved in the laboratory analyses of the FSS soil samples.
MDCs for HTD nuclide: Nuclide 10% - 50% DCGL (vCi/gl H~ 1.3E+O 1 - 6.4E+0 1 1.9E-0 1 - 9.7E-0 1 1.OE+03 - 5.1E+03 2.8E+01 1.4E+02 6.OE 3 .OE-0 1 5.OE 2.5E+00 1.2E+00 - 5.8E+00 1.1 E+00 - 5.3E+00 3.4E+01 - 1.7E+02 1.OE+00 - 5.1E+00 1.1E+00 - 5.6E+00 The MDC values for difficult to detect nuclides will be conveyed to the outside laboratory via the sample chain-of-custody form DPF-8823.1 which will accompany the soil samples.
MDCR for SPA-3: The accompanying table in Attachment 1 provides MDCR values by various background levels.
MDC @CGL,,,,e,,.e,,, J for SPA-3 The accompanying table in Attachment 1 provides MDC values by scans: various background levels.
QC checks and measurements: QC checks for ISOCS will be in accordance with DP-8869 and DP-8871.
QC checks for the Leica GPS will be performed in accordance with DP-8859.
QC checks for the SPA-3 will be performed in accordance with DP-8504.
Two QC split samples will be collected (note: this is in accordance with DP-8852 requirements).
YNPS Chemistry Lab will perform a QC Recount on at least one soil sample (Note: This is in accordance with DP-8852 requirements).
4.0 Define the boundaries of the survey:
Boundaries of Survey Unit 00L-09-05 are as shown on the attached map. There are no sub-surface 1I systems that traverse or connect within the survey unit. There are no plant-related structures present in survey unit 05. 00L-09-05 is bounded by 00L-09-03 on the north, west and south and by OOL-09-04 to the East. Survey unit 05 is entirely buffered by Class 3 land areas survey units 00L-09-03 and 00L-09-04.
The survey will be performed under appropriate weather conditions (as defined by instrumentation limitations and human tolerance). Surveys may be performed on any shift of work.
DPF-Page u 5.0 Develov a decision rule:
Upon review of the FSS data collected under this survey plan:
(a) Sf all the sample data show that the soil concentrations of LTP-listed nuclides are below the 8.73 mredyear DCGLs and the sum of fractions of LTP-listed nuclides are below unity, then reject the null hypothesis (i.e., Survey Unit 00L-09-05 meets the release criteria).
(b) lfthe investigation levels are exceeded, then perform an investigation survey.
(c) If the average concentration of any LTP-listed nuclide exceeds its respective DCGL, or the average sum of fractions of LTP-listed nuclides exceeds unity, then accept the null hypothesis (i.e., Survey Unit 00L-09-05 fails to meet the release criteria).
1 6.0 S ~ e c i h tolerable limits on decision errors: 1 Null hypothesis: Residual plant-related radioactivity in Survey Unit 00L-09-05 exceeds the release criteria.
Probability of type I error: 1 0.05 I Probability of type 11 error: 1 0.05 I
I LBGR: The applicable soil (8.73-mredy) DCGL + 2 I LBGR = 1.5; Adjusted = 2.9 II 7.0 O~tirnizeDesign:
Type of statistical test: WRS Test Sign Test (background will not be subtracted)
Number and Location of Samples: 20 soil samples will be collected at locations based on a random start, systematic triangular grid (refer to accompanying DPF-8853.1).
Biased samples: None. J S e e d e o n pcqe I' cr %d \ S U ~ ~ ( W A ~
Biased sample locations: N/A -\-oa > ~ - o 9 - 6FSC Plan $7111)0~
GENERAL INSTRUCTIONS I. Where possible, measurement locations will be identified using GPS in accordance with DP-8859. Each location will be marked to assist in identifying the location. Any locations that are not suitable for soil sampling will be relocated to the nearest suitable location and documented in the field log in accordance with DP-8856.
1 2. Soil samples will be collected in accordance with DP-8 120.
I I1 3. Chain-of-Custody form will be used in accordance with DP-8123 for all soil samples sent to an off-site laboratory.
- 4. All soil samples will be received and prepared in accordance with DP-88 13.
uI I :N
- Split samples to be sent to an off-site lab will not be dried prior to counting on site or shipping.
I I 5. Collect ISOCS measurements in accordance with DP-8871 to provide 100% scan coverage of the survey unit.
- 6. Survey instrument: Operation of the E-600 w/SPA-3 will be in accordance with DP-8535 with QC checks performed in accordance with DP-8504. The instrument response checks shall be performed u
before issue and after use.
- 7. All SPA-3 scans will be performed with the audible feature activated. FSS Technicians will listen for upscale readings to which they will respond by slowing down or stopping the probe to distinguish between random fluctuations in the background and greater than background readings.
- 18. The job hazards associated with the survey described in this package are addressed in the accompanyingl DPF-8856.1 Page 5 off -! IO 6 1ls1 f+bb
Job Hazard Assessment (JI-IA) for 00L-09-05.
- 9. All personnel participating in this survey shall be trained in accordance with DP-8868.
SPECIFIC INSTRUCTIONS
- 1. All designated measurement locations will be identified by GPS per DP-8859 or by use of reference points and tape measure as necessary. If a designated sample location is obstructed for any reason, the FSS Radiological Engineer or the FSS Field Supervisor will select an alternate location in accordance with DP-8856. A detailed description of the alternate location will be recorded on form DPF-8856.2, the survey unit map will be annotated appropriately, and the alternate location will be conspicuously marked to facilitate re-visiting to identifL and record the coordinates with GPS in accordance with DP-8859 or by measurement from a known reference point when GPS is not available.
- 12. Sample Requirements: 1 Collect 20 random I -liter soil samples in accordance with DP-8120. Two of the 20 random soil samples will be analyzed as QC split samples to fulfill the QC requirement of DP-8852. The same QC splil samples will be analyzed for Hard-to-Detect nuclides in accordance with section 5.6.3.2.1 of the LTP and DP-8856.
FSS soil samples: 00L-09-05-00 1-F through 00L-09-05-020-F corresponding to FSS sample locations 001 through 020.
Biased soil samples: None.
QC split samples: 00L-09-05-007-F-S and 00L-09-05-013-F-S to be designated as QC split samples.
Recount samples: 00L-09-05-016-F-RC is to be counted twice on site. The results will be compared in accordance with DP-8864.
1 4. Sample Analysis:
I Gamma analysis will be performed on all soil samples. If any of the gamma analyses show that an investigation level has been exceeded an investigation survey will be conducted at that sample location as directed in specific instruction # 6.
YNPS Chemistry will analyze 00L-09-05-001-F through 00L-09-05-020-F for gamma-emitting nuclides.
YNPS Chemistry will analyze 00L-09-05-0016-F as a sample recount. The recounted sample will possess the naming convention 00L-09-05-0 16-F-RC.
YNPS Chemistry will analyze 00L-09-05-007-F-S and 00L-09-05-013-F-S for gamma-emitting nuclides prior to being sent to the off-site laboratory. The samples will be analyzed for gamma-emitting nuclides and HTDs as collected from the field (i.e., without drying) at the off-site laboratory.
Ensure that the lid to the 1-liter Marinelli containers are secured and sealed with electrical tape to prevent loss of moisture during shipping.
On-site gamma analysis of the FSS samples shall achieve the MDC values stated in the DQO section of this plan. The MDCs will be communicated to the laboratory using an attachment to the Chain-of-Custody form.
1 5. ISOCS Assays: 1 DPF.
Page
Collect sufficient (or more as determined necessary in the field) ISOCS measurements in accordance with DP-887 1 to provide 100% scan coverage of the survey unit.
ISOCS assays are designated using the following convention: 00L-09-05-xxx-F-G where xxx is the three digit number specific to a location.
QC checks shall be performed daily in accordance with DP-8869 and DP-8871. Resolve flags encountered prior to survey.
ISOCS assays to be performed with 180° collimator at lm unless otherwise directed by the FSS Engineer. Make note on the daily survey journal (DPF-8856.2) if other geometries are used.
Designate additional assay locations in continuing sequence from the last number assigned to an FSS measurement. Record detailed information about additional assay locations on the daily survey journal.
If the results on any ISOCS assay exceed an investigation level, investigate the area within the ISOCS area of evaluation (2.8m radius - 24.6m2 area for 180"-lm) for that assay as directed in Specific Instruction # 7.
Remove standing water prior to performance of ISOCS assays. Contact the FSS Engineer for directions if conditions are such that standing water cannot be removed.
- 6. If the results of any FSS sample (statistical andlor biased points) analysis exceed an investigation level, perform a first level investigation as follows:
m: Detailed descriptions of investigation actions shall be recorded in the daily survey journal (DPF-8856.2).
Review ISOCS data for assays in which the sample requiring investigation may have been in the field of view.
Scan a Im radius footprint around the sample location with a SPA3 in rate-meter mode moving the detector at a speed of 0.25m or less per second, keeping the probe at a distance of approximately 3" from the surface and following a serpentine path that includes at least 3 passes across each square meter. The area of scan should be increased as necessary to bound any areas of elevated activity identified.
Mark the boundaries around any detected elevated areas in the soil and identify the boundaries on a survey map. Measure the total area of each outlined area in square centimeters.
Mark the location of the highest identified activity for each of the elevated areas in the soil and on the survey map.
At each of the highest identified activity areas:
Perform and record a 1-minute scaler mode SPA-3 measurement. Designate the reading as "00L-09-05-xxx-F-SC-I" where "xxx" continues sequentially from the last number assigned to an FSS measurement.
Obtain a soil sample at the location. Designate the sample as "00L-09-05-xxx-F-I" where "xxx" continues sequentially from the last number assigned to an FSS measurement.
Perform and record a post sample 1-minute SPA-3 measurement. Designate the reading as DPF-8856.1j-Page 7 o f y
described above.
- 7. If the results of an ISOCS assay exceed an investigation level, perform a first level investigation as
~O~IOWS: & L e Ph3r 9 F.r FGSP k d \ fkAi~,~ y71,,)oC Note: Detailed descriptions of investigation actions shall be recorded in the daily survey journal (DPF-8856.2).
Scan the ISOCS area of evaluation footprint with a SPA3 in rate-meter mode moving the detector at a speed of 0.25m or less per second, keeping the probe at a distance of approximately 3" from the surface and following a serpentine path that includes at least 3 passes across each square meter.
Mark the boundaries around any detected elevated areas in the soil and identify the boundaries on a survey map. Measure the total area of each outlined area in square centimeters.
Mark the location of the highest identified activity for each of the elevated areas in the soil and on the survey map.
At each of the highest identified activity areas:
Perform and record a 1-minute scaler mode SPA-3 measurement. Designate the reading as "00L-09-05-xxx-F-SC-I" where "xxx" continues sequentially from the last number assigned to an FSS measurement.
Obtain a soil sample at the location. Designate the sample as "00L-09-05-xxx-F-I" where "xxx" continues sequentially from the last number assigned to an FSS measurement.
Perform and record a post sample 1-minute SPA-3 measurement. Designate the reading as described above.
Re-perform the ISOCS assay. Designate the assay as "00L-09-05-xxx-F-G-I" where "xxx" continues sequentially from the last number assigned to an FSS measurement.
NOTIFICATION POINTS None.
ate , Iq DpF-8856.
Page dI 8 off l ,I*
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Rev. 1 Supplement to 00L-09-05 FSS Plan D O 0 Step 7.0 Optimize Design (add to end of section)
Note: This supplement provides specific instructions for performance of investigation surveys of ISOCS scan measurements. ISOCS scan measurements that exceed the investigation criteria (stated in Section 3.0 of this plan) or other measurements selected by the FSSE will be investigated. Due to the survey unit proximity to the ISFSI, SPA-3 measurements are greatly influenced by radiation associated with stored fuel. It is preferable to use ISOCS in a collimated geometry in an attempt to reduce the area requiring SPA-3 scans.
S~ecificInstructions S t e 7~ (add after Note. before first bullet)
ISOCS scan locations to be investigated are 00L-09-05-127-F-G and 00L-09-05-137-F-G.
Perform ISOCS scan measurements at each investigation location as follows:
o Perform ISOCS investigation scans at l m height with 90° collimation.
o Perform ISOCS scans at 5 locations within a 4-m grid centered over the original ISOCS scan location - One centered over the original scan location and one in each comer of the grid centered at 1.4 m from the center of the grid. ISOCS Scan Investigation Map #1 shows the proper positioning for ISOCS investigation scans.
o Identify investigation ISOCS scans using the convention: 00L-09-05-xxx-F-(3-1, where the xxx indicates the next sequential location number starting with 300 (i.e. the first investigation ISOCS scan performed will be 00L-09-05-300-F-G-I).
o Indicate any observations in the daily survey journal. Location of ISOCS scans should be recorded by use of GPS when available.
o The FSSE will review investigation ISOCS scans and will direct performance of SPA-3 scans.
o Note: The FSSE may direct performance of additional investigation surveys or terminate steps by use of memo(s) that will be inserted in the survey package file.
Prepared By Date 7 (I 1 Ia6 Approved B ~ '
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