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| number = ML082620112 | | number = ML082620112 | ||
| issue date = 05/28/2008 | | issue date = 05/28/2008 | ||
| title = | | title = Final Status Survey Summary Report, May 21, 2008, West Radwaste Piping System, Survey Unit F8990423 | ||
| author name = Brown E | | author name = Brown E | ||
| author affiliation = Sacramento Municipal Utility District (SMUD) | | author affiliation = Sacramento Municipal Utility District (SMUD) | ||
| addressee name = | | addressee name = | ||
| Line 16: | Line 16: | ||
=Text= | =Text= | ||
{{#Wiki_filter:Rancho Seco Final Status Survey Summary Report.May 21, 2008 West Radwaste.Piping System Survey Unit F8990423 Prepared By: Date: | {{#Wiki_filter:Rancho Seco Final Status Survey Summary Report | ||
FSS Engineer Reviewed By: Date: V /ol Lead FSS Engineer Approved By: j Date: 7 --Dismantlement Superintendent, Radiological FINAL STATUS SURVEY | .May 21, 2008 West Radwaste.Piping System Survey Unit F8990423 Prepared By: Date: 5//O/z_*:g FSS Engineer Reviewed By: o*(, *4 12A* Date: V /ol Lead FSS Engineer Approved By: j Date: 7 - - | ||
Dismantlement Superintendent, Radiological | |||
FINAL STATUS SURVEY | |||
==SUMMARY== | ==SUMMARY== | ||
REPORT Survey Unit: F8990423, Radwaste Piping System Survey Unit | REPORT Survey Unit: | ||
F8990423, Radwaste Piping System Survey Unit | |||
== Description:== | == Description:== | ||
Operating History: This system transported liquid radioactive waste through the waste processing system. This system was designed to be contaminated. | Operating History: This system transported liquid radioactive waste through the waste processing system. This system was designed to be contaminated. Operating records and the HSA support its status as radioactively contaminated system piping. | ||
Operating records and the HSA support its status as radioactively contaminated system piping.Site Characterization: | Site Characterization: Direct measurements were made of the interior surfaces of the system piping which confirmed the presence of plant-derived radionuclides. Direct measurements of the interior showed a mean gross activity level of 49,700,000 dpmr100 cm2 and'a maximum value of 211,000,000 dpm/100 cm 2 . Based on the classification procedure (DSIP-0020) and levels of gross activity reported, the system was determined to be a Class 1 system. | ||
Direct measurements were made of the interior surfaces of the system piping which confirmed the presence of plant-derived radionuclides. | HSA Events: N/A Radioactive by design. | ||
Direct measurements of the interior showed a mean gross activity level of 49,700,000 dpmr100 | Survey Unit Design Information: | ||
The Survey Unit Design Parameters are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment | The Survey Unit Design Parameters are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment 1. Direct measurement locations were spaced at 15cm intervals and 10.7 m2 were scanned for 100% coverage. | ||
The instrumentation used for the survey along with the MDC values are listed in Tables 2-1 and 2-2 in Attachment 2. | |||
Survey Unit: Class: SU Area (m2): Evaluator: | Page 2 of 14 FSS Summary Report F8990423 | ||
DCGL (dpm/100 cm 2): Area Factor: Design DCGLemc (dpm/100 cm 2): LBGR (dpm/100 cm | |||
Table 1. Survey Unit Design Parameters Survey Design Value Comment Parameter Survey*Area: F899 Radwaste Piping System Survey Unit: 0423 Structure Surface Class: 1 LTP Table 5-4 SU Area (m2): 10.7 Evaluator: Erin L. Brown DCGL (dpm/100 cm 2): 100000 Gross. Activity DCGL Area Factor: 1 Class I Design DCGLemc 100000 Class 1 (dpm/100 cm 2): | |||
2 LBGR (dpm/100 cm ):* 50000 Default 50% DCGL Design Sigma (dpm/100 cm 2): 100000 Type I Error: 0.05 Type II Error: 0.05 Predominant Nuclide: Cs-137 Sample Area (m2): N/A Class 1 Scan Area (m2): 10.7 Scan Coverage (%): 100% Class I Zl-. : | |||
1.645 1.645 Sign P: 0.691462 Calculated Relative Shift: 0.5 1 Relative Shift Used: 0.5 Uses 3.0 if Relative Shiftt is | |||
Range: | >3 N-Value: 74 Design N-Value + 20%: 89 NUREG- 1575 Table 5-5 Design Min Samples N: 89 Class 1 Grid Spacing L: 0.3 Class 1 Page 3 of 14 FSS Summary Report F8990423 | ||
The survey design required 393 direct measurements for the Sign Test. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL. The sample standard deviation was less than the design standard deviation so no additional samples were required.Page 12 of 14 FSS Summary Report F8990423 Table 4. Data Assessment Results Survey Results Parameter Value Comment Material Background Used (dpm/100 cm 2): N/A Ambient Background Used (dpm/100 cm 2): N/A Average Ambient BKG = 0 Actual Direct Measurements (N): 393 Median (dpm/100 Cm | |||
Maximum (dpm/100 cm 2): 10368 Material Type: N/A Background Subtract Not Applied Sign Test Final N Value: 393 S+ Value: 393 Critical Value: 213 Sufficient Samples Collected: | Survey Results: | ||
Yes Maximum Value < DCGL: Yes Median Value < DCGL: Yes Mean Value < DCGL: Yes Maximum Value < DCGLemc: Yes Class 1 Total Standard Deviation | A total of 393 direct measurements were made in F8990423. The results including mean, median, standard deviation and range are shown in Table 2. All direct measurements were less than the DCGL. None of the measurements indicated areas of elevated activity. | ||
<= Sigma: Yes Pass the Sign Test? Yes Reject the Null Hypothesis? | Survey activity ranged from 1752 to 10368 dpm/100 cm2 , based on the pipe detector efficiency. | ||
Yes Does the Survey Unit Pass All Criteria? | Table 2. Direct Measurement Results Measurement ID Gross Activity (dpm/100 cm F8990423-MOO01GI 10368 F8990423-MOO02GI 5047 F8990423-MOO03GI 4628 F8990423-MOO04GI 4617 F8990423-MOO05GI 4494 F8990423-MOO06GI 4700 F8990423-MOO07GI 4375 F8990423-MOO08GI 4592 F8990423-MOO09GI 4267 F8990423-MOOIOGI 4299 F8990423-MOO 1 GI 4223 F8990423-MOO12GI 4509 F8990423-MOO13GI 4678 F8990423-MOO14GI 4718 F8990423-MOO15GI 3974 F8990423-MOO16GI 4751 F8990423-MOO17GI 6344 F8990423-MOO18GI 6810 F8990423-MOO19GI 4809 F8990423-MOO20GI 4458 F8990423-MOO21GI 5733 F8990423-M0022GI 4675 F8990423-M0023GI 4527 F8990423-M0024GI 4281 F8990423-M0025GI 4357 F8990423-M0026GI 5658 F8990423-M0027GI 2980 F8990423-M0028GI 2710 F8990423-M0029GI 2510 F8990423-MOO30GI 2407 F8990423-MOO31GI 2711 F8990423-M0032GI 2805, F8990423-M0033GI 2652 F8990423-M0034GI 2474 F8990423-M0035GI 2499 F8990423-M0036GI 2499 F8990423-M0037GI 2626 F8990423-M0038GI 2515 F8990423-M0039GI 2581 F8990423-MOO40GI 2655 Page 4 of 14 FSS Summary Report F8990423 | ||
Yes Page 13 of 14 FSS Summary Report F8990423 Survey Unit Investigations and Results: No investigations were required and no investigation results are reported.ALARA Statement: | |||
As stated in Chapter 4 of the LTP, as long as the residual activity within the survey unit is less than the DCGL (i.e. the survey unit average activity is less than the DCGL and the EMC criterion has been met), the ALARA criterion has been met.Changes in Initial Survey Unit Assumptions: | F8990423-MOO41GI 2637 F8990423-M0042GI 2564 F8990423-M0043GI 2416 F8990423-M0044GI 2310 F8990423-M0045GI 2894 F8990423-M0046GI 2956 F8990423-M0047GI 2708 F8990423-M0048GI 2700 F8990423-M0049GI 2898 F8990423-M0055GI 8403 F8990423-M0056GI 4888 F8990423-M0057GI 4899 F8990423-M0058GI 4389 F8990423-M0059GI 4447 F8990423-MOO60GI 4682 F8990423-MOO61GI 4975 F8990423-M0062GI 4653 F8990423-M0063GI 4252 F8990423-MO101GI 8353 F8990423-MO102GI 5845 F8990423-MO103GI 5466 F8990423-MO104GI 4975 F8990423-MO105GI 4512 F8990423-MO106GI 4556 F8990423-MO107GI 4317 F8990423-MO108GI 4462 F8990423-MO109GI 4827 F8990423-MOIIOGI 4263 F8990423-MOI 11 GI 4642 F8990423-MO112GI 4180 F8990423-MO113GI 4491 F8990423-MO114GI 4339 F8990423-MO115GI 5014 F8990423-MO116GI 4682 F8990423-MO117GI 4866 F8990423-MO118GI 4115 F8990423-MO119GI 4429 F8990423-MO120GI 4628 F8990423-MO121GI 4787 F8990423-M0122GI 5235 F8990423-M01 23GI 2078 F8990423-MO124GI 2274 F8990423-M0125GI 2522 F8990423-M0126GI 2829 F8990423-M0127GI 2841 F8990423-M0128GI 2966 F8990423-M0129GI 3067 F8990423-MO130GI 3097 F8990423-MO131GI 3092 F8990423-M0132GI 2986 F8990423-M0133GI 3026 F8990423-MO134GI 3072 F8990423-M0135GI 3606 F8990423-M0136GI 3650 F8990423-M0137GI 3574 F8990423-MO138GI 3462 Page 5 of 14 FSS Summary Report F8990423 | ||
The survey unit was designed as a Class 1 structure survey and the sample results are consistent with that classification. | |||
The variability of the survey results was less than the characterization data used for survey design. No potential areas of elevated activity were detected.Conclusion: | F8990423-M0139GI 3525 F8990423-MO140GI 3660 F8990423-MO141GI 3465 F8990423-M0142GI 3358 F8990423-M0143GI 3474 F8990423-MO144GI 3680 F8990423-M0145GI 3821 F8990423-M0146GI 3661 F8990423-M0147GI 3735 F8990423-M0148GI 3962 F8990423-M0149GI 4117 F8990423-MO150GI 4174 F8990423-MO151GI 3934 F8990423-M0152GI 3894 F8990423-M0153GI 3703 F8990423-MO154GI 3649 F8990423-M0155GI 3587 F8990423-MO156GI 3517 F8990423-M0157GI 2986 F8990423-MO158GI 2800 F8990423-MO159GI 2813 F8990423-MO160GI 2904 F8990423-MO161GI 2605 F8990423-MO162GI 2492 F8990423-MO163GI 2410 F8990423-MO164GI 2688 F8990423-MO165GI 2919 F8990423-M0166GI 3373 F8990423-M0167GI 3506 F8990423-M0168GI 3634 F8990423-M0169GI 3634 F8990423-MO170GI 3901 F8990423-MO171GI 2934 F8990423-M0172GI 3459 F8990423-M0173GI 3481 F8990423-M0174GI 3412 F8990423-M0175GI 2572 F8990423-M0176GI 2279 F8990423-M0177GI 2749 F8990423-M0178GI 3236 F8990423-M0179GI 3705 F8990423-MO180GI 3569 F8990423-MO181GI 3419 F8990423-MO182GI 3466 F8990423-M0183GI 4511 F8990423-MO184GI 4409 F8990423-M0185GI 4699 F8990423-M0186GI 4363 F8990423-MO187GI 4135 F8990423-M0188GI 4462 F8990423-M0189GI 4439 F8990423-MO190GI 4501 F8990423-MO191GI 4488 F8990423-M0192GI 4528 F8990423-M0193GI 4647 F8990423-M0194GI 4369 Page 6 of 14 FSS Summary Report F8990423 | ||
The FSS of this survey unit was properly designed as a Class I survey based on Table 5-4 of the LTP. The required number of direct measurements was made and the scan coverage met the requirement of the LTP for pipe surveys. No direct measurements exceeded the DCGL of 100000 dpm/100 cm 2 or the grout limit of 21,000 dpffll/O0cm 2.No investigations were required.The direct measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.It is concluded that survey unit F8990423 meets the release criteria of I OCFR20.1402. | |||
Page 14 of 14 FSS Summary Report F8990423 Attachment I Maps May 21, 2008 Survey Unit F8990423 (D 5.7 m.-r 00 | F8990423-M0195GI 4587 F8990423-M0196GI 4726 F8990423-M0197GI 4696 F8990423-M0198GI 4557 F8990423-M0199GI 4640 F8990423-MO200GI 4528 F8990423-MO201GI 4508 F8990423-M0202GI 4458 | ||
.F8990423-M0203G.1 4280 F8990423-M0204GI 4478 F8990423-M0205GI 4339 F8990423-M0206GI 4376 F8990423-M0207GI 4363 F8990423-M0208GI 4478 F8990423-M0209GI 4531 F8990423-MO210GI 4105 F8990423-MO211GI 4415 F8990423-M0212GI 4409 F8990423-M0213GI 4161 F8990423-M0214GI 4240 F8990423-M0215GI 4379 F8990423-M0216GI 4300 F8990423-M0217GI 4125 F8990423-M0218GI 4326 F8990423-M0219GI 4125 F8990423-M0220GI 5036 F8990423-M0221GI 5050 F8990423-M0222GI 5030 F8990423-M0223GI 5135 F8990423-M0224GI 4927 F8990423-M0225GI 4085 F8990423-M0226GI 4373 F8990423-M0227GI 4039 F8990423-M0228GI 4432 F8990423-M0229GI 4419 F8990423-M0230GI 3894 F8990423-M0231GI 4168 F8990423-M0232GI 4415 F8990423-M0233GI 4557 F8990423-M0234GI 4349 F8990423-M0235GI 4392 F8990423-M0236GI 4392 F8990423-M0237GI 4191 F8990423-M0238GI. 4551 F8990423-M0239GI 4188 F8990423-M0240GI 4174 F8990423-M0241GI 4098 F8990423-M0242GI 4270 F8990423-M0243GI 4508 F8990423-M0244GI 4349 F8990423-M0245GI 4468 F8990423-M0246GI 4399 F8990423-M0247GI 4392 F8990423-M0248GI 4353 F8990423-M0249GI 4458 F8990423-M0250GI 4174 Page 7 of 14 FSS Summary Report F8990423 | |||
F8990423-M0251GI 4003 F8990423-M0252GI 4151 F8990423-M0253GI 4092 F8990423-M0254GI 4267 F8990423-M0255GI 4264 F8990423-M0256GI 4036 F8990423-M0257GI 4138 F8990423-M0258GI 4075 F8990423-M0259GI 4191 F8990423-M0260GI 4174 F8990423-M0261GI 4155 F8990423-M0262GI 4244 F8990423-M0263GI 4448 F8990423-M0264GI 4277 F8990423-M0265GI 4676 F8990423-M0266GI 4468 F8990423-M0267GI 5446 F8990423-M0268GI 4960 F8990423-M0269GI 3757 F8990423-M0270GI 3797 F8990423-M0271GI 3829 F8990423-M0272GI 4046 F8990423-M0273GI 4115 F8990423-M0274GI 4144 F8990423-M0275GI 3988 F8990423-M0276GI 4137 F8990423-M0277GI 4249 F8990423-M0278GI 4144 F8990423-M0279GI 3970 F8990423-M0280GI 3923 F8990423-M0281GI 3963 F8990423-M0282GI 3811 F8990423-M0283GI 3985 F8990423-M0284GI 3620 F8990423-M0285GI 3909 F8990423-M0286GI 3562 F8990423-M0287GI 1752 F8990423-M0288GI 1761 F8990423-M0289GI 1832 F8990423-M0290GI 2021 F8990423-M0291GI 2037 F8990423-M0292GI 1951 F8990423-M0293GI 2077 F8990423-M0294GI 1912 F8990423-M0295GI 2136 F8990423-M0296GI 2151 F8990423-M0297GI 1938 F8990423-M0298GI 2106 F8990423-M0299GI 2052 F8990423-MO300GI 2015 F8990423-M0301GI 2190 F8990423-M0302GI 1996 F8990423-M0303GI 2120 F8990423-M0304GI 2108 F8990423-MO305GI 1793 F8990423-M0306GI 1864 Page 8 of 14 FSS Summary Report F8990423 | |||
F8990423-M0307GI 2054 F8990423-M0308GI 2035 F8990423-M0309GI 2060 F8990423-MO310GI 2069 F8990423-M0311GI 2106 F8990423-M0312GI 2125 F8990423-M0313GI 2052 F8990423-M0314GI 5426 F8990423-M0315GI 4165 F8990423-M0316GI 3880 F8990423-M0317GI 3764 F8990423-M0318GI 3913 F8990423-M03199GI 3819 F8990423-M0320GI 3840 F8990423-M0321GI 4342 F8990423-M0322GI 3616 F8990423-M0323GI 4025 F8990423-M0324GI 3978 F8990423-M0325GI 3927 F8990423-M0326GI 3931 F8990423-M0327GI 4469 F8990423-M0328GI 4122 F8990423-M0329GI 4053 F8990423-M0330GI 4115 F8990423-M0331GI 3757 F8990423-M0332GI 3783 F8990423-M0333GI 6575 F8990423-M0334GI 4436 F8990423-M0335GI 3952 F8990423-M0336GI 3952 F8990423-M0337GI 8241 F8990423-M0338GI 5163 F8990423-M0339GI 4357 F8990423-M0340GI 4137 F8990423-M0341GI 3949 F8990423-M0342GI 3595 F8990423-M0343GI 3613 F8990423-M0344GI 4014 F8990423-M0345GI 4787 F8990423-M0346GI 4964 F8990423-M0347GI 4606 F8990423-M0348GI 4592 F8990423-M0349GI 5231 F8990423-M0350GI 4436 F8990423-M0351GI 4566 F8990423-M0352GI 4415 F8990423-M0353GI 4498 F8990423-M0354GI 4371 F8990423-M0355GI 4397 F8990423-M0356GI 4433 F8990423-M0357GI 4498 F8990423-M0358GI 4433 F8990423-M0359GI 4733 F8990423-M0360GI 4328 F8990423-M0361GI 4743 F8990423-M0362GI 4516 Page 9 of 14 FSS Summary Report F8990423 | |||
F8990423-M0363GI 4328 F8990423-M0364GI 4790 F8990423-M0365GI 4718 F8990423-M0366GI 4205 F8990423-M0367GI 4523 F8990423-M0368GI 4252 F8990423-M0369GI 4812 F8990423-M0370GI 5159 F8990423-MO371GI 5918 F8990423-M0372GI 4790 F8990423-M0373GI 5004 F8990423-M0374GI 4960 F8990423-M0375GI 5011 F8990423-M0376GI 4798 F8990423-M0377GI 4498 F8990423-M0378GI 4639 F8990423-M0379GI 4765 F8990423-M0380GI 4566 F8990423-MO381GI 4852 F8990423-M0382GI 5350 F8990423-M0390GI 3319 F8990423-M0391GI 3025 F8990423-M0392GI 3189 F8990423-M0393GI 3237 F8990423-M0401 GI 5322 F8990423-M0402GI 3992 F8990423-M0403GI 4028 F8990423-M0404GI 3902 F8990423-M0405GI 4227 F8990423-M0406GI 3761 F8990423-M0407GI 3815 F8990423-M0408GI 3801 F8990423-M0409GI 4288 F8990423-MO410GI 4379 F8990423-M0411GI 4545 F8990423-M0412GI 4321 F8990423-M0413GI 4393 F8990423-M0414GI 4538 F8990423-M0415GI 4953 F8990423-M0416GI 4144 F8990423-M0417GI 4415 F8990423-M0418GI 4585 F8990423-M0419GI 4147 F8990423-M0420GI 5069 F8990423-M0421GI 5119 F8990423-M0422GI 4657 F8990423-M0423GI 4212 F8990423-M0424GI 4198 F8990423-M0425GI 4545 F8990423-M0426GI 4256 F8990423-M0427GI 4462 F8990423-M0428GI 4267 F8990423-M0429GI 4249 F8990423-M0430GI 3927 F8990423-M0431GI 4256 F8990423-M0432GI 4274 Page l10 of 14 FSS Summary Report F8990423 | |||
F8990423-M0433GI 4870 F8990423-M0442GI 2674 F8990423-M0443GI 2312 F8990423-M0444GI 1895 F8990423-M0445GI 2009 F8990423-M0446GI 2035 F8990423-M0447GI 1922 F8990423-M0448GI 1937 F8990423-M0449GI 1933 F8990423-M0450GI 1910 F8990423-M0451GI 1873 F8990423-M0452GI 1976 F8990423-M0453GI 1987 F8990423-M0454GI 1843 F8990423-M0455GI 2192 F8990423-M0456GI 2073 F8990423-M0457GI 2086 Mean: 3929 Median: 4168 Standard Deviation: 1089 Range: 1752-10368 Page I I of 14 FSS Summary Report F8990423 | |||
Survey Unit Data Assessment: | |||
The survey design required 393 direct measurements for the Sign Test. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL. The sample standard deviation was less than the design standard deviation so no additional samples were required. | |||
Page 12 of 14 FSS Summary Report F8990423 | |||
Table 4. Data Assessment Results Survey Results Parameter Value Comment Material Background Used (dpm/100 cm 2): N/A Ambient Background Used (dpm/100 cm 2): N/A Average Ambient BKG = 0 Actual Direct Measurements (N): 393 2 | |||
Median (dpm/100 Cm ): 4168 2 | |||
Mean (dpm/100 cm ): 3929 Direct Measurement Standard Deviation 1089 (dpm/ 100 cm 2 ): | |||
Total Standard Deviation (dpm/100 cm 2 ): 1089 Based on samples and backgrounds. | |||
Maximum (dpm/100 cm 2): 10368 Material Type: N/A Background Subtract Not Applied Sign Test Final N Value: 393 S+ Value: 393 Critical Value: 213 Sufficient Samples Collected: Yes Maximum Value < DCGL: Yes Median Value < DCGL: Yes Mean Value < DCGL: Yes Maximum Value < DCGLemc: Yes Class 1 Total Standard Deviation <= Sigma: Yes Pass the Sign Test? Yes Reject the Null Hypothesis? Yes Does the Survey Unit Pass All Criteria? Yes Page 13 of 14 FSS Summary Report F8990423 | |||
Survey Unit Investigations and Results: | |||
No investigations were required and no investigation results are reported. | |||
ALARA Statement: | |||
As stated in Chapter 4 of the LTP, as long as the residual activity within the survey unit is less than the DCGL (i.e. the survey unit average activity is less than the DCGL and the EMC criterion has been met), the ALARA criterion has been met. | |||
Changes in Initial Survey Unit Assumptions: | |||
The survey unit was designed as a Class 1 structure survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design. No potential areas of elevated activity were detected. | |||
== | |||
Conclusion:== | |||
The FSS of this survey unit was properly designed as a Class I survey based on Table 5-4 of the LTP. The required number of direct measurements was made and the scan coverage met the requirement of the LTP for pipe surveys. No direct measurements exceeded the DCGL of 100000 dpm/100 cm 2 or the grout limit of 21,000 dpffll/O0cm 2 . | |||
No investigations were required. | |||
The direct measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met. | |||
It is concluded that survey unit F8990423 meets the release criteria of I OCFR20.1402. | |||
Page 14 of 14 FSS Summary Report F8990423 | |||
Attachment I Maps May 21, 2008 Survey Unit F8990423 | |||
(D 5.7 m.-r 00 PIPINGSULAARY | |||
~Zu LR Eam AUXILIARY BUILDING DRAINS 10 40* 23 LF Z5 SM RADWASTE EL. -20 VA 30 LF 1 5 SM WEST SUMP 10 45 LIF 1.5 S)M F8990423-M1 423 SHEET1 OF 5 RC | |||
(D 00 40 | |||
0 L2ýj NEAUTOR a' I | |||
00 PLAN AT EL. -20'-0" PIPIJO SUMI41RJ 10 AUXILIARY BUILDING DRAINS 4'a 30 LF 3 SM RADWASTE EL. -20 2"o 4-5 .F 2.5 S4 WEST SUMP 0s 2.5 SCALE M4ETERS | |||
\t F8990423-M1 | |||
9.. | |||
CD ROOM 1 17 CORRIDOF ROOM 105 PLAN AT EL. 0'-0" ROOM 211 oc 1,,c PIPING SULMIARY PLAN AT EL. 20'-0" AUXILIARY BUILDING DRAINS SIZE LENGTH AREA RADWASTE EL. 0' & +20' 2"o 3 LF .15 SM 0 .5 1 SCALE HETERS 2 (DN SACRAMENTO MUNICIPAL UTILITY DISTR CT WEST SUMP F8990423-M1 | |||
ROOM 321 F - | |||
EL 0*--G cc C/2 PLAN AT EL 40'-0" Pipmd | |||
==SUMMARY== | ==SUMMARY== | ||
AUXILIARY BUILDING DRAINS RADWASTE EL. +40' 2'0 31 iF.5SUi WEST SUMP F8990423-M1 | |||
Tabl e 2-2. Investigation Criteria and DCGL Value Parameter (dpm/100 cm 2)Investigation Criteria -Direct 100000 Investigation Criteria -Scan N/A DCGLW 100000 DCGLEMC N/A Page 2 of 2 Att. 2 Instrumentation F8990423 Attachment 3 Investigation May 21, 2008 Survey Unit F8990423 (none required) | 0 | ||
Attachment 4 Data Assessment May 21, 2008 Survey Unit F8990423 (D | % ,3b lly 1 e7 F~O L,N N, | ||
----50th Percentile I | N 100 NPIPNG SUMUiARY AUXILIARY BUILDING DRAINS 4!' 25 V 7-5 5N SMUn RADWASTE 2'0 40 LF 251.4 ScfACiRAEN -MUNICIPAL LTIfLfY DISTRICT F8990423-M2 RC RAYMOND FLE! F"899422 SHEET 1 OF 4 | ||
0Q | |||
CD 00 C0 00 PIRNG SWAAW( | |||
SIZE LEN1 AREA 4'0 4 1F .551,4 10O 45 LF 1.5 SU AUXILIARY BUILDING DRAINS S SMUm SACWAENTO MUI~dCIPAL UlLfITY DISTRICT F1rU- F8990423 RADWASTE F8990423-M2. | |||
HIEE-T2 OF 4 RC PAYMOND | |||
0C 212 0 11 1 | |||
EP 1 | |||
orj 00 PIPING SUMM~ARY AUXILIARY BUILDING DRAINS ed 25 U 2-5 SM RADWASTE 2 s 2'o 40 1F F8990423-M2 | |||
0U I CF). N'F 94 - | |||
fA ~ | |||
- * *-@ I AUILIRRD TBULIGDAN jell* | |||
AO SM O AUIIRYBIDNGDAN SAMET MUIIA WA NA I-L WRTF99 43 M RIF | |||
-4R FR~n9 qwF AMN Flt~ ~ ~j4~ 4 OF 4 RC RAY)AOND | |||
Attachment 2 Instrumentation May 21, 2008 Survey Unit F8990423 | |||
Table 2-1. Survey Unit Instrumentation Instrument Detector MDC Static MDC Scan Model; Serial No. Model; Serial No. (dpm/100 cm 2) (dpm/100 cm 2 ) | |||
M2350; 142514 PIPEMON; B821Z 4680 N/A M2350; 142512 44-159; 201637 5250 N/A M2350; 189081 44-159; 199736 3930 N/A M2350; 142512 44-157; 215958 1750 N/A M2350; 189081 44-157; 201250 1750 N/A The MDC noted for the detector model 44-159 is for the 2" diameter piping which is the most conservative. | |||
Tabl e 2-2. Investigation Criteria and DCGL Value Parameter (dpm/100 cm 2) | |||
Investigation Criteria - Direct 100000 Investigation Criteria - Scan N/A DCGLW 100000 DCGLEMC N/A Page 2 of 2 Att. 2 Instrumentation F8990423 | |||
Attachment 3 Investigation May 21, 2008 Survey Unit F8990423 (none required) | |||
Attachment 4 Data Assessment May 21, 2008 Survey Unit F8990423 | |||
(D F8990423 Gross Activity Sample Results Quantile Plot DCGL = 100000 dpm/I00cm2 12,000 10,000 0n 8,000 (n | |||
I 6,000 CD~ | |||
I 4,000 4168 2,000 (n | |||
0 0 20 40 60 80 100 Percentile 00 I + Direct Measurements (dpm/iOOcm2) -median - - -, 75th Percentile - - - - 50th Percentile I | |||
0Q a | |||
a* F8990423 Gross Activity Sample Results Scatter Plot DCGL = 100000 dpmnfiOOcm 2 12000 10000 E | |||
0 00 o8000 O A | |||
o w a " w " a a a a a M a a a = a a a a a a " aw a a a a a aw 7197 0 o 6000 0 0 | |||
0 0o oo* | |||
4000- C00 0& | |||
3929 | |||
'C 2000 a S - - - - a a ---- - - | |||
-- -- -- - -- - -- a - -a a | |||
* 662 0 | |||
aD 't ( (0 00 C) t 0 (a) 0 Ot) V) 0O 0' 00 fk.O A* | |||
N)3 0 0 0- V 0 M 0T 0 0 0- 0to 0 Measurement Locations 100 o | |||
0 Gross Activity - Average - - "+3StDev" - a "-3StDev" | |||
CD F8990423 Gross Activity Frequency Plot DCGL = 100000 dpm/1 00crm 2 18 C2 El C | |||
02 1g858 | |||
-4 60 70 50 0 | |||
N~ | |||
TII 00 Bins - Upper End Value (dpm/1 00cm2)}} | |||
Latest revision as of 21:44, 12 March 2020
| ML082620112 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 05/28/2008 |
| From: | Ellen Brown Sacramento Municipal Utility District (SMUD) |
| To: | NRC/FSME |
| References | |
| MPC&D 08-064 | |
| Download: ML082620112 (31) | |
Text
Rancho Seco Final Status Survey Summary Report
.May 21, 2008 West Radwaste.Piping System Survey Unit F8990423 Prepared By: Date: 5//O/z_*:g FSS Engineer Reviewed By: o*(, *4 12A* Date: V /ol Lead FSS Engineer Approved By: j Date: 7 - -
Dismantlement Superintendent, Radiological
FINAL STATUS SURVEY
SUMMARY
REPORT Survey Unit:
F8990423, Radwaste Piping System Survey Unit
Description:
Operating History: This system transported liquid radioactive waste through the waste processing system. This system was designed to be contaminated. Operating records and the HSA support its status as radioactively contaminated system piping.
Site Characterization: Direct measurements were made of the interior surfaces of the system piping which confirmed the presence of plant-derived radionuclides. Direct measurements of the interior showed a mean gross activity level of 49,700,000 dpmr100 cm2 and'a maximum value of 211,000,000 dpm/100 cm 2 . Based on the classification procedure (DSIP-0020) and levels of gross activity reported, the system was determined to be a Class 1 system.
HSA Events: N/A Radioactive by design.
Survey Unit Design Information:
The Survey Unit Design Parameters are presented in Table 1 below. The survey unit and measurement locations are depicted on the maps in Attachment 1. Direct measurement locations were spaced at 15cm intervals and 10.7 m2 were scanned for 100% coverage.
The instrumentation used for the survey along with the MDC values are listed in Tables 2-1 and 2-2 in Attachment 2.
Page 2 of 14 FSS Summary Report F8990423
Table 1. Survey Unit Design Parameters Survey Design Value Comment Parameter Survey*Area: F899 Radwaste Piping System Survey Unit: 0423 Structure Surface Class: 1 LTP Table 5-4 SU Area (m2): 10.7 Evaluator: Erin L. Brown DCGL (dpm/100 cm 2): 100000 Gross. Activity DCGL Area Factor: 1 Class I Design DCGLemc 100000 Class 1 (dpm/100 cm 2):
2 LBGR (dpm/100 cm ):* 50000 Default 50% DCGL Design Sigma (dpm/100 cm 2): 100000 Type I Error: 0.05 Type II Error: 0.05 Predominant Nuclide: Cs-137 Sample Area (m2): N/A Class 1 Scan Area (m2): 10.7 Scan Coverage (%): 100% Class I Zl-. :
1.645 1.645 Sign P: 0.691462 Calculated Relative Shift: 0.5 1 Relative Shift Used: 0.5 Uses 3.0 if Relative Shiftt is
>3 N-Value: 74 Design N-Value + 20%: 89 NUREG- 1575 Table 5-5 Design Min Samples N: 89 Class 1 Grid Spacing L: 0.3 Class 1 Page 3 of 14 FSS Summary Report F8990423
Survey Results:
A total of 393 direct measurements were made in F8990423. The results including mean, median, standard deviation and range are shown in Table 2. All direct measurements were less than the DCGL. None of the measurements indicated areas of elevated activity.
Survey activity ranged from 1752 to 10368 dpm/100 cm2 , based on the pipe detector efficiency.
Table 2. Direct Measurement Results Measurement ID Gross Activity (dpm/100 cm F8990423-MOO01GI 10368 F8990423-MOO02GI 5047 F8990423-MOO03GI 4628 F8990423-MOO04GI 4617 F8990423-MOO05GI 4494 F8990423-MOO06GI 4700 F8990423-MOO07GI 4375 F8990423-MOO08GI 4592 F8990423-MOO09GI 4267 F8990423-MOOIOGI 4299 F8990423-MOO 1 GI 4223 F8990423-MOO12GI 4509 F8990423-MOO13GI 4678 F8990423-MOO14GI 4718 F8990423-MOO15GI 3974 F8990423-MOO16GI 4751 F8990423-MOO17GI 6344 F8990423-MOO18GI 6810 F8990423-MOO19GI 4809 F8990423-MOO20GI 4458 F8990423-MOO21GI 5733 F8990423-M0022GI 4675 F8990423-M0023GI 4527 F8990423-M0024GI 4281 F8990423-M0025GI 4357 F8990423-M0026GI 5658 F8990423-M0027GI 2980 F8990423-M0028GI 2710 F8990423-M0029GI 2510 F8990423-MOO30GI 2407 F8990423-MOO31GI 2711 F8990423-M0032GI 2805, F8990423-M0033GI 2652 F8990423-M0034GI 2474 F8990423-M0035GI 2499 F8990423-M0036GI 2499 F8990423-M0037GI 2626 F8990423-M0038GI 2515 F8990423-M0039GI 2581 F8990423-MOO40GI 2655 Page 4 of 14 FSS Summary Report F8990423
F8990423-MOO41GI 2637 F8990423-M0042GI 2564 F8990423-M0043GI 2416 F8990423-M0044GI 2310 F8990423-M0045GI 2894 F8990423-M0046GI 2956 F8990423-M0047GI 2708 F8990423-M0048GI 2700 F8990423-M0049GI 2898 F8990423-M0055GI 8403 F8990423-M0056GI 4888 F8990423-M0057GI 4899 F8990423-M0058GI 4389 F8990423-M0059GI 4447 F8990423-MOO60GI 4682 F8990423-MOO61GI 4975 F8990423-M0062GI 4653 F8990423-M0063GI 4252 F8990423-MO101GI 8353 F8990423-MO102GI 5845 F8990423-MO103GI 5466 F8990423-MO104GI 4975 F8990423-MO105GI 4512 F8990423-MO106GI 4556 F8990423-MO107GI 4317 F8990423-MO108GI 4462 F8990423-MO109GI 4827 F8990423-MOIIOGI 4263 F8990423-MOI 11 GI 4642 F8990423-MO112GI 4180 F8990423-MO113GI 4491 F8990423-MO114GI 4339 F8990423-MO115GI 5014 F8990423-MO116GI 4682 F8990423-MO117GI 4866 F8990423-MO118GI 4115 F8990423-MO119GI 4429 F8990423-MO120GI 4628 F8990423-MO121GI 4787 F8990423-M0122GI 5235 F8990423-M01 23GI 2078 F8990423-MO124GI 2274 F8990423-M0125GI 2522 F8990423-M0126GI 2829 F8990423-M0127GI 2841 F8990423-M0128GI 2966 F8990423-M0129GI 3067 F8990423-MO130GI 3097 F8990423-MO131GI 3092 F8990423-M0132GI 2986 F8990423-M0133GI 3026 F8990423-MO134GI 3072 F8990423-M0135GI 3606 F8990423-M0136GI 3650 F8990423-M0137GI 3574 F8990423-MO138GI 3462 Page 5 of 14 FSS Summary Report F8990423
F8990423-M0139GI 3525 F8990423-MO140GI 3660 F8990423-MO141GI 3465 F8990423-M0142GI 3358 F8990423-M0143GI 3474 F8990423-MO144GI 3680 F8990423-M0145GI 3821 F8990423-M0146GI 3661 F8990423-M0147GI 3735 F8990423-M0148GI 3962 F8990423-M0149GI 4117 F8990423-MO150GI 4174 F8990423-MO151GI 3934 F8990423-M0152GI 3894 F8990423-M0153GI 3703 F8990423-MO154GI 3649 F8990423-M0155GI 3587 F8990423-MO156GI 3517 F8990423-M0157GI 2986 F8990423-MO158GI 2800 F8990423-MO159GI 2813 F8990423-MO160GI 2904 F8990423-MO161GI 2605 F8990423-MO162GI 2492 F8990423-MO163GI 2410 F8990423-MO164GI 2688 F8990423-MO165GI 2919 F8990423-M0166GI 3373 F8990423-M0167GI 3506 F8990423-M0168GI 3634 F8990423-M0169GI 3634 F8990423-MO170GI 3901 F8990423-MO171GI 2934 F8990423-M0172GI 3459 F8990423-M0173GI 3481 F8990423-M0174GI 3412 F8990423-M0175GI 2572 F8990423-M0176GI 2279 F8990423-M0177GI 2749 F8990423-M0178GI 3236 F8990423-M0179GI 3705 F8990423-MO180GI 3569 F8990423-MO181GI 3419 F8990423-MO182GI 3466 F8990423-M0183GI 4511 F8990423-MO184GI 4409 F8990423-M0185GI 4699 F8990423-M0186GI 4363 F8990423-MO187GI 4135 F8990423-M0188GI 4462 F8990423-M0189GI 4439 F8990423-MO190GI 4501 F8990423-MO191GI 4488 F8990423-M0192GI 4528 F8990423-M0193GI 4647 F8990423-M0194GI 4369 Page 6 of 14 FSS Summary Report F8990423
F8990423-M0195GI 4587 F8990423-M0196GI 4726 F8990423-M0197GI 4696 F8990423-M0198GI 4557 F8990423-M0199GI 4640 F8990423-MO200GI 4528 F8990423-MO201GI 4508 F8990423-M0202GI 4458
.F8990423-M0203G.1 4280 F8990423-M0204GI 4478 F8990423-M0205GI 4339 F8990423-M0206GI 4376 F8990423-M0207GI 4363 F8990423-M0208GI 4478 F8990423-M0209GI 4531 F8990423-MO210GI 4105 F8990423-MO211GI 4415 F8990423-M0212GI 4409 F8990423-M0213GI 4161 F8990423-M0214GI 4240 F8990423-M0215GI 4379 F8990423-M0216GI 4300 F8990423-M0217GI 4125 F8990423-M0218GI 4326 F8990423-M0219GI 4125 F8990423-M0220GI 5036 F8990423-M0221GI 5050 F8990423-M0222GI 5030 F8990423-M0223GI 5135 F8990423-M0224GI 4927 F8990423-M0225GI 4085 F8990423-M0226GI 4373 F8990423-M0227GI 4039 F8990423-M0228GI 4432 F8990423-M0229GI 4419 F8990423-M0230GI 3894 F8990423-M0231GI 4168 F8990423-M0232GI 4415 F8990423-M0233GI 4557 F8990423-M0234GI 4349 F8990423-M0235GI 4392 F8990423-M0236GI 4392 F8990423-M0237GI 4191 F8990423-M0238GI. 4551 F8990423-M0239GI 4188 F8990423-M0240GI 4174 F8990423-M0241GI 4098 F8990423-M0242GI 4270 F8990423-M0243GI 4508 F8990423-M0244GI 4349 F8990423-M0245GI 4468 F8990423-M0246GI 4399 F8990423-M0247GI 4392 F8990423-M0248GI 4353 F8990423-M0249GI 4458 F8990423-M0250GI 4174 Page 7 of 14 FSS Summary Report F8990423
F8990423-M0251GI 4003 F8990423-M0252GI 4151 F8990423-M0253GI 4092 F8990423-M0254GI 4267 F8990423-M0255GI 4264 F8990423-M0256GI 4036 F8990423-M0257GI 4138 F8990423-M0258GI 4075 F8990423-M0259GI 4191 F8990423-M0260GI 4174 F8990423-M0261GI 4155 F8990423-M0262GI 4244 F8990423-M0263GI 4448 F8990423-M0264GI 4277 F8990423-M0265GI 4676 F8990423-M0266GI 4468 F8990423-M0267GI 5446 F8990423-M0268GI 4960 F8990423-M0269GI 3757 F8990423-M0270GI 3797 F8990423-M0271GI 3829 F8990423-M0272GI 4046 F8990423-M0273GI 4115 F8990423-M0274GI 4144 F8990423-M0275GI 3988 F8990423-M0276GI 4137 F8990423-M0277GI 4249 F8990423-M0278GI 4144 F8990423-M0279GI 3970 F8990423-M0280GI 3923 F8990423-M0281GI 3963 F8990423-M0282GI 3811 F8990423-M0283GI 3985 F8990423-M0284GI 3620 F8990423-M0285GI 3909 F8990423-M0286GI 3562 F8990423-M0287GI 1752 F8990423-M0288GI 1761 F8990423-M0289GI 1832 F8990423-M0290GI 2021 F8990423-M0291GI 2037 F8990423-M0292GI 1951 F8990423-M0293GI 2077 F8990423-M0294GI 1912 F8990423-M0295GI 2136 F8990423-M0296GI 2151 F8990423-M0297GI 1938 F8990423-M0298GI 2106 F8990423-M0299GI 2052 F8990423-MO300GI 2015 F8990423-M0301GI 2190 F8990423-M0302GI 1996 F8990423-M0303GI 2120 F8990423-M0304GI 2108 F8990423-MO305GI 1793 F8990423-M0306GI 1864 Page 8 of 14 FSS Summary Report F8990423
F8990423-M0307GI 2054 F8990423-M0308GI 2035 F8990423-M0309GI 2060 F8990423-MO310GI 2069 F8990423-M0311GI 2106 F8990423-M0312GI 2125 F8990423-M0313GI 2052 F8990423-M0314GI 5426 F8990423-M0315GI 4165 F8990423-M0316GI 3880 F8990423-M0317GI 3764 F8990423-M0318GI 3913 F8990423-M03199GI 3819 F8990423-M0320GI 3840 F8990423-M0321GI 4342 F8990423-M0322GI 3616 F8990423-M0323GI 4025 F8990423-M0324GI 3978 F8990423-M0325GI 3927 F8990423-M0326GI 3931 F8990423-M0327GI 4469 F8990423-M0328GI 4122 F8990423-M0329GI 4053 F8990423-M0330GI 4115 F8990423-M0331GI 3757 F8990423-M0332GI 3783 F8990423-M0333GI 6575 F8990423-M0334GI 4436 F8990423-M0335GI 3952 F8990423-M0336GI 3952 F8990423-M0337GI 8241 F8990423-M0338GI 5163 F8990423-M0339GI 4357 F8990423-M0340GI 4137 F8990423-M0341GI 3949 F8990423-M0342GI 3595 F8990423-M0343GI 3613 F8990423-M0344GI 4014 F8990423-M0345GI 4787 F8990423-M0346GI 4964 F8990423-M0347GI 4606 F8990423-M0348GI 4592 F8990423-M0349GI 5231 F8990423-M0350GI 4436 F8990423-M0351GI 4566 F8990423-M0352GI 4415 F8990423-M0353GI 4498 F8990423-M0354GI 4371 F8990423-M0355GI 4397 F8990423-M0356GI 4433 F8990423-M0357GI 4498 F8990423-M0358GI 4433 F8990423-M0359GI 4733 F8990423-M0360GI 4328 F8990423-M0361GI 4743 F8990423-M0362GI 4516 Page 9 of 14 FSS Summary Report F8990423
F8990423-M0363GI 4328 F8990423-M0364GI 4790 F8990423-M0365GI 4718 F8990423-M0366GI 4205 F8990423-M0367GI 4523 F8990423-M0368GI 4252 F8990423-M0369GI 4812 F8990423-M0370GI 5159 F8990423-MO371GI 5918 F8990423-M0372GI 4790 F8990423-M0373GI 5004 F8990423-M0374GI 4960 F8990423-M0375GI 5011 F8990423-M0376GI 4798 F8990423-M0377GI 4498 F8990423-M0378GI 4639 F8990423-M0379GI 4765 F8990423-M0380GI 4566 F8990423-MO381GI 4852 F8990423-M0382GI 5350 F8990423-M0390GI 3319 F8990423-M0391GI 3025 F8990423-M0392GI 3189 F8990423-M0393GI 3237 F8990423-M0401 GI 5322 F8990423-M0402GI 3992 F8990423-M0403GI 4028 F8990423-M0404GI 3902 F8990423-M0405GI 4227 F8990423-M0406GI 3761 F8990423-M0407GI 3815 F8990423-M0408GI 3801 F8990423-M0409GI 4288 F8990423-MO410GI 4379 F8990423-M0411GI 4545 F8990423-M0412GI 4321 F8990423-M0413GI 4393 F8990423-M0414GI 4538 F8990423-M0415GI 4953 F8990423-M0416GI 4144 F8990423-M0417GI 4415 F8990423-M0418GI 4585 F8990423-M0419GI 4147 F8990423-M0420GI 5069 F8990423-M0421GI 5119 F8990423-M0422GI 4657 F8990423-M0423GI 4212 F8990423-M0424GI 4198 F8990423-M0425GI 4545 F8990423-M0426GI 4256 F8990423-M0427GI 4462 F8990423-M0428GI 4267 F8990423-M0429GI 4249 F8990423-M0430GI 3927 F8990423-M0431GI 4256 F8990423-M0432GI 4274 Page l10 of 14 FSS Summary Report F8990423
F8990423-M0433GI 4870 F8990423-M0442GI 2674 F8990423-M0443GI 2312 F8990423-M0444GI 1895 F8990423-M0445GI 2009 F8990423-M0446GI 2035 F8990423-M0447GI 1922 F8990423-M0448GI 1937 F8990423-M0449GI 1933 F8990423-M0450GI 1910 F8990423-M0451GI 1873 F8990423-M0452GI 1976 F8990423-M0453GI 1987 F8990423-M0454GI 1843 F8990423-M0455GI 2192 F8990423-M0456GI 2073 F8990423-M0457GI 2086 Mean: 3929 Median: 4168 Standard Deviation: 1089 Range: 1752-10368 Page I I of 14 FSS Summary Report F8990423
Survey Unit Data Assessment:
The survey design required 393 direct measurements for the Sign Test. The critical value and the results of the Sign Test are presented in Table 4. The sample mean and median values were less than the DCGL. The sample standard deviation was less than the design standard deviation so no additional samples were required.
Page 12 of 14 FSS Summary Report F8990423
Table 4. Data Assessment Results Survey Results Parameter Value Comment Material Background Used (dpm/100 cm 2): N/A Ambient Background Used (dpm/100 cm 2): N/A Average Ambient BKG = 0 Actual Direct Measurements (N): 393 2
Median (dpm/100 Cm ): 4168 2
Mean (dpm/100 cm ): 3929 Direct Measurement Standard Deviation 1089 (dpm/ 100 cm 2 ):
Total Standard Deviation (dpm/100 cm 2 ): 1089 Based on samples and backgrounds.
Maximum (dpm/100 cm 2): 10368 Material Type: N/A Background Subtract Not Applied Sign Test Final N Value: 393 S+ Value: 393 Critical Value: 213 Sufficient Samples Collected: Yes Maximum Value < DCGL: Yes Median Value < DCGL: Yes Mean Value < DCGL: Yes Maximum Value < DCGLemc: Yes Class 1 Total Standard Deviation <= Sigma: Yes Pass the Sign Test? Yes Reject the Null Hypothesis? Yes Does the Survey Unit Pass All Criteria? Yes Page 13 of 14 FSS Summary Report F8990423
Survey Unit Investigations and Results:
No investigations were required and no investigation results are reported.
ALARA Statement:
As stated in Chapter 4 of the LTP, as long as the residual activity within the survey unit is less than the DCGL (i.e. the survey unit average activity is less than the DCGL and the EMC criterion has been met), the ALARA criterion has been met.
Changes in Initial Survey Unit Assumptions:
The survey unit was designed as a Class 1 structure survey and the sample results are consistent with that classification. The variability of the survey results was less than the characterization data used for survey design. No potential areas of elevated activity were detected.
==
Conclusion:==
The FSS of this survey unit was properly designed as a Class I survey based on Table 5-4 of the LTP. The required number of direct measurements was made and the scan coverage met the requirement of the LTP for pipe surveys. No direct measurements exceeded the DCGL of 100000 dpm/100 cm 2 or the grout limit of 21,000 dpffll/O0cm 2 .
No investigations were required.
The direct measurement data support rejection of the null hypothesis, providing high confidence that the survey unit satisfied the release criteria and that the data quality objectives were met.
It is concluded that survey unit F8990423 meets the release criteria of I OCFR20.1402.
Page 14 of 14 FSS Summary Report F8990423
Attachment I Maps May 21, 2008 Survey Unit F8990423
(D 5.7 m.-r 00 PIPINGSULAARY
~Zu LR Eam AUXILIARY BUILDING DRAINS 10 40* 23 LF Z5 SM RADWASTE EL. -20 VA 30 LF 1 5 SM WEST SUMP 10 45 LIF 1.5 S)M F8990423-M1 423 SHEET1 OF 5 RC
(D 00 40
0 L2ýj NEAUTOR a' I
00 PLAN AT EL. -20'-0" PIPIJO SUMI41RJ 10 AUXILIARY BUILDING DRAINS 4'a 30 LF 3 SM RADWASTE EL. -20 2"o 4-5 .F 2.5 S4 WEST SUMP 0s 2.5 SCALE M4ETERS
\t F8990423-M1
9..
CD ROOM 1 17 CORRIDOF ROOM 105 PLAN AT EL. 0'-0" ROOM 211 oc 1,,c PIPING SULMIARY PLAN AT EL. 20'-0" AUXILIARY BUILDING DRAINS SIZE LENGTH AREA RADWASTE EL. 0' & +20' 2"o 3 LF .15 SM 0 .5 1 SCALE HETERS 2 (DN SACRAMENTO MUNICIPAL UTILITY DISTR CT WEST SUMP F8990423-M1
ROOM 321 F -
EL 0*--G cc C/2 PLAN AT EL 40'-0" Pipmd
SUMMARY
AUXILIARY BUILDING DRAINS RADWASTE EL. +40' 2'0 31 iF.5SUi WEST SUMP F8990423-M1
0
% ,3b lly 1 e7 F~O L,N N,
N 100 NPIPNG SUMUiARY AUXILIARY BUILDING DRAINS 4!' 25 V 7-5 5N SMUn RADWASTE 2'0 40 LF 251.4 ScfACiRAEN -MUNICIPAL LTIfLfY DISTRICT F8990423-M2 RC RAYMOND FLE! F"899422 SHEET 1 OF 4
CD 00 C0 00 PIRNG SWAAW(
SIZE LEN1 AREA 4'0 4 1F .551,4 10O 45 LF 1.5 SU AUXILIARY BUILDING DRAINS S SMUm SACWAENTO MUI~dCIPAL UlLfITY DISTRICT F1rU- F8990423 RADWASTE F8990423-M2.
HIEE-T2 OF 4 RC PAYMOND
0C 212 0 11 1
EP 1
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Attachment 2 Instrumentation May 21, 2008 Survey Unit F8990423
Table 2-1. Survey Unit Instrumentation Instrument Detector MDC Static MDC Scan Model; Serial No. Model; Serial No. (dpm/100 cm 2) (dpm/100 cm 2 )
M2350; 142514 PIPEMON; B821Z 4680 N/A M2350; 142512 44-159; 201637 5250 N/A M2350; 189081 44-159; 199736 3930 N/A M2350; 142512 44-157; 215958 1750 N/A M2350; 189081 44-157; 201250 1750 N/A The MDC noted for the detector model 44-159 is for the 2" diameter piping which is the most conservative.
Tabl e 2-2. Investigation Criteria and DCGL Value Parameter (dpm/100 cm 2)
Investigation Criteria - Direct 100000 Investigation Criteria - Scan N/A DCGLW 100000 DCGLEMC N/A Page 2 of 2 Att. 2 Instrumentation F8990423
Attachment 3 Investigation May 21, 2008 Survey Unit F8990423 (none required)
Attachment 4 Data Assessment May 21, 2008 Survey Unit F8990423
(D F8990423 Gross Activity Sample Results Quantile Plot DCGL = 100000 dpm/I00cm2 12,000 10,000 0n 8,000 (n
I 6,000 CD~
I 4,000 4168 2,000 (n
0 0 20 40 60 80 100 Percentile 00 I + Direct Measurements (dpm/iOOcm2) -median - - -, 75th Percentile - - - - 50th Percentile I
0Q a
a* F8990423 Gross Activity Sample Results Scatter Plot DCGL = 100000 dpmnfiOOcm 2 12000 10000 E
0 00 o8000 O A
o w a " w " a a a a a M a a a = a a a a a a " aw a a a a a aw 7197 0 o 6000 0 0
0 0o oo*
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0 Gross Activity - Average - - "+3StDev" - a "-3StDev"
CD F8990423 Gross Activity Frequency Plot DCGL = 100000 dpm/1 00crm 2 18 C2 El C
02 1g858
-4 60 70 50 0
N~
TII 00 Bins - Upper End Value (dpm/1 00cm2)