IR 05000312/1974011
| ML19309A147 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 11/04/1974 |
| From: | Book H, Fish R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | |
| Shared Package | |
| ML19309A134 | List: |
| References | |
| 50-312-74-11, NUDOCS 8003260862 | |
| Download: ML19309A147 (6) | |
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U. S. ATOMIC ENERGY COMMISSION
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DIRECTORATR OF REGULATORY OPERATIONS
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REGION V
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RO Inspection Report No. 50-312/74-11 Docket No. 50-312 Licensee Sacramento Municipal Utility District License No. DPR-54 6201 S. Street, P. O. Box 15830 Sacramento, California 95813 Priority i
Category B
Facility Rancho Seco Location Clay Station, California Type of Facility PWR, B&W, 913 MWe (2772 MWt)
Type of Inspection Laboratory capability Dates of Inspection June 12 through October 28, 1974 Dates of Previous Inspection Not applicable
//!Y!7k Principal Inspector
R. F. Fish, Radiation Specialist
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None Accompanying Inspectors Date Date
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Other Accompanying Personnel:
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Date H. E. Book, Chief, Radiological and Environmental Protection Branch
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SUMMARY OF FINDINGS
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Enforcement Action
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None Licensee Action on Previously Identified Enforcement Items
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None
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Unusual Occurrences None Other Significant Findings A.
Current Findings 1..
Liquid Test Standard All of the licensee's analytical results of the liquid test standard were in agreement with those of the AEC laboratory.
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2.
Charcoal Cartridge Standard The licensee's analytical results of the charcoal cartridge standards were in agreement with those of the AEC laboratory.
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Particulate Filter Standard
All of the licensee's analytical results of the particulate filter standard were in agreement with those of the AEC laboratory except for strontium-90. The licensee's analyses of a second filter standard for strontium-90 were in possible agreement with that of the AEC laboratory.
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Management Interview
J The results of comparing the licensee's analyses of the three types of standards with those of the AEC laboratory,were disucssed with Mr. R.
Rodriguez, Manager, Nuclear Operations, by telephone on October 30,
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1974.
Mr. Rodriguez was informed that with respect to strontium-90, additional comparisons would be made on the'first AEC plant sample i
analyses.
Mr. Rodriguez stated that they would continue to run periodic standards to assure reliable strontium analyses.
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DETAILS
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Persons Contacted R. Miller, Chemical and Radiation Protection Supervisor D. Martin, Plant Health Physicist 2.
Capability Tests
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a.
The licensee will be required to measure the quantities and concentrations of radioactive tr.aterial released in effluents as a result of operating his facility. This requirement is to assure and to demonstrate compliance with the 11=its specified in AEC Regulations and the limits that have been specified in his operating license.
This inspection consisted of a test of the licensee's capa-bility to measure radioactive material in test standards
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which approximate samples of actual radioactive effluent. The testa consist of comparing the licensee's measurements with
those of the AEC's reference laboratory which prepared the test standards. The measurements made by the AEC's laboratory
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are referenced directly to the National Bureau of Standards radioactivity measurements system.by laboratory intercomparisons.
This inspection showed the licensee's measurements on the test standards are acceptable under the test criteria used by the Directorate of Regulatory Operations for comparing measurement results (see the Attachment). The types of test standards
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used and the results of measurements were as follows.
b.
Type of Sample: Liquid Test Standard Received by-licensee on June 12, 1974 Results in Units of Disintegrations per Minute (DPM)/ total sample AGREEMENT
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AEC Licensee's Radionuclide Reference Measurement Measurement
3 H-3 2.41 1 0.04 x 10 2.69 1 0.04 x 10 6.90 1 0.04 x 104 Mn-54 6.68 1 0.04 x 104
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Zn-65 1.21 1 0.03 x 10 1.21 1 0.08 x 10
4 Sr-89 1.59 + 0.02 x 10 1.80 + 0.03 x 10
3 Sr-90 2.83 I 0.06 x 10 2.24 I 0.19 x 10
4 Ce-144 1.32 I 0.05 x 10 1.42 I 0.07 x 10
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Gross Beta (1) 5.5610.03 x 10 6.26 1 0.04 x 10
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(1) Both Laboratories reference to Cs-137.
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Type of Sample: Charcoal Cartridge Standards j
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Received by licensee on September 3, 1974 s:,,f.vt y.ol.. r.
>3...~ ::f OResults 'iri Units 'of disintegrations. per minute / total. sample.-
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AEC Licensee's Radionuclide Reference Measurement Measurement 4 Ba-133 1.64 1 0.06 x 10'
1.61 1 0.14 x 10 (cartridge E)
4 Ba-133 3.26 1 0.09 x 10 2.70 1 0.09 x 10 (cartridge H)
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Type of Sa:aple: Particulate Filter' Standard Received by licensee on June 12, 1974 Results in DPM/ total sample AGREEMENT
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AEC Licensee's Radionuclide Reference Measurement Measurement
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4 Co-60 1.18 + 0.02 x 10 1.13 + 0.02 x 10
3 Sr-89 2.71 1 0.05 x 10 2.26 1 0.04 x 10 5.75 1 0.13 x 104 Cs-137 6.55 1 0.09 x 104 Ce-144 1.53 1 0.09 x 10 1.44 1 0.03 x 10
DISAGREEMENT
2 Sr-90 1.10 1 0.01 x 10 1.45 i 1.12 x 10 i
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Type of Sample: Particulate Filter Standard Received by licensee on September 4, 1974
Results in Units of Microcuries/ total sample POSSIBLE AGREEMENT i
AEC Licensee's Radionuclide Reference Measurement Measurement i
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Sr-89 2.70 1 0.03 x 10 1.84 i 0.19 x 10-
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-3-3 Sr-90 2.97 1 0.03 x 10 2.24 1 0.11 x 10 It appears that the licensee's analytical results for all isotopes in this Particulate Filter Standard are consistently below AEC results. The licensee stated that periodic standard sa=ples will l
be processed in the laboratory in an atte=pt to define the problem
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I and to assure analytical results are reliable.
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ATTACHMENT
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- ;eCRITERIA FOR COMPARING ANALYTICAL MEASUREMENTS
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LICENSEE VALUE
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- RATIO (AEC REFERENCE VALUE)
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Possible Possible
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Resolution Agreement p reement A Agree =ent B
0.4 - 2.5 G..a - 3.0 No Comparison 4-7 0.5 - 2.0 0.4 - 2.5 0.3 - 3.0 8.- 15 0.6 - 1.66 0.5 - 2.0 0.4 - 2.5 16 - 50 0.75 - 1.33 0.6 - 1.66 0.5 - 2.0 51 - 200-0.80 - 1.25 0.75 - 1.33 0.6 - 1.66
>200 0.85 - 1.18 0.80 - 1.25 0.75 - 1.33
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"A" criteria are applied to the following analyses:
Gamma Spectrometry where principal gamma energy used for identification is greater than 250 Kev.
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Tritium analyses of liquid samples.
Iodine on adsorbers.
"B" criteria are applied to the following analyses:
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Gamma spectrometry where principal gamma energy used for identification is less than 250 Kev.
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Sr and Sr determinations.
Gross Beta where samples are counted on the same date using the same reference nuclide.
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associated uncertainty (la) to obtain the resolution.
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b.
The ratio of the two measurements to be compared should be determined by dividing the result to be compared by the AEC Reference Laboratory result.
c.
Agreement is considered obtained if the ratio falls within the range given in the " Agreement" column for the a gociated resolution. For exa=ple, consider a comparison of S,r-5 determinations. A licensee obtains a value of 1.97 +.08 x 10 uCi/ml and the gC Reference Laboratory reports a result of 2.53 +.06 x 10 uCi/ml. The resolution would be 42 (2.53/.06)
, and the ratio is 0.78 (1.97/2.53). This pair of measurements would be considered to be in " agreement" because for this resolution, the " agreement" range is 0.75 - 1.33.
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. If " agreement" is not achieved, the ratio should be evaluated for "possible agreement." In this case, consideration is made for the type of analyses conducted by selecting a range in the
, appropriate column; i.e., "A" analyses or "B" analyses.
If the ratio falls outside the appropriate. "possible agreement" e.
column, the two measurements vill be considered to be in
" disagreement."
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