IR 05000315/1986037
| ML17324B132 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 11/04/1986 |
| From: | Januski A, Oestmann M, Schumacher M NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML17324B128 | List: |
| References | |
| 50-315-86-37, 50-316-86-37, NUDOCS 8611170413 | |
| Download: ML17324B132 (21) | |
Text
U. S.
NUCLEAR REGULATORY COMMISSION
REGION III
Repor ts No. 50-315/86037(DRSS);
No.
50-316/86037(DRSS)
Docket Nos.
50-315; 50-316 Licensee:
American Electric Power Service Corporation Indiana and Michigan Power Company 1 Riverside Plaza Columbus, OH 43216 Licenses No.
DPR-58; 'DPR-74 Facility Name:
Donald C.
Cook Plant, Units 1 and
Inspection At:
Donald C.
Cook Site, Bridgman, MI Inspection Conducted:
October 6 through 9, 1986 yi,.g.di'W~~
Inspectors:
M. J.
Oestmann u.A.
A.
G.
nuska
~g Q/~/4c~
Approved By:
M.
C.
Schumacher, Chief Radi ol ogi cal Eff1 uents and Chemistry Section Ins ection Summar jd/w//d'd ate
%/g i ate
"i~fr~
ate Ins ection on October 6 throu h 9 1986 (Re orts No.
50-315/86037(DRSS)
No.
5 -316 86
DRSS
~A:,
di p
i f:
(noh i
y d
Radiochemistry, including water chemistry control, quality assurance/quality control (gA/gC) of sampling and analyses in the laboratory, observation of technician performance, laboratory and sampling rooms, and review of plant systems affecting water quality; (2) radiological environmental monitoring program (REMP), including program implementation and results, review of 1985 annual reports and 1986 quarterly reports, lower limits of detection (LLD) and reporting levels; (3) training and qualification of chemistry staff; (4) licensee internal audits; and (5) review of corrective actions taken on a
previously identified violation and open items.
Resuits:
No vioiations or deviations were identified in seven of eight areas inspected.
One apparent violation was identified in the area of implementing the REMP for failure to achieve the LLD values during analysis of drinking water samples from public intakes; and to collect four milk samples within the required 15 day sampling period in 1985 as required by Technical Specification 4.12.1 (Severity Level IV).
Sb11170413 8b1104
',',PDR ADOCK 05000315 I. 8 PDR
J
DETAILS 1.
Persons Contacted
~W.
G. Smith, Jr., Plant Manager
~T.
A. Kriesel, Technical Physical Sciences Superintendent
~L. Gibson, Assistant Plant Manager Technical Support
~R.
A. Palmer, Technical Physical Sciences Engineer
~M. Alexich, AEPSC Vice President Nuclear
~D.
V. Shaller, AEPSC Staff Engineer
~S.
Khali 1, Technical Physical Sciences, Radiation Protection Engineer R. J.
Clendenning, Technical Physical Sciences, Radiation Protection Section Chief
~A. A. Blind, Assistant Plant Manger, Organization and Administration
~J.
J.
Nadeau, AEPSC equality Assurance Engineer
~B.
A. Jepkeme, AEPSC equality Assurance Engineer
~J.
T. Wojcik, Plant Chemist, Technical Physical Sciences R. J. Huerter, Coordinator of Audits, gA
~M.
M. Terry, equality Control, Administrator Compliance Coordination Engineer K. Baker, Operations Superintendent T.
R. Stephens, Production Supervising Engineer A. Puplis, Senior Performance Engineer S.
McLea, Chemistry Laboratory Supervisor J.
Ersland, Supervisor, Training Skills S. Sterk, Training Instructor C. Haglund, Chemistry Supervisor
~B. Jorgensen, NRC Senior Resident Inspector The inspectors also interviewed several other licensee personnel during the course of the inspection; including chemistry, health physics, and training personnel.
~Denotes those present at the plant exit interview on October 9, 1986.
2.
Licensee Actions on Previous Ins ection Findin s
a.
(Closed)
Open Item (50-315/85037-01; 50-316/85037-01):
Licensee to analyze split sample and report results on H-3, Sr-89, Sr-90, Fe-55 and gross beta to Region III.
A dirty waste holdup tank liquid radwaste sample split in November 1985 yielded disagreements for gross beta, H-3 and Fe-55, and no comparison for Sr-89 and Sr-90, thought to be attributable to a nonrepresentative split of the sample.
Results of comparisons from a spi ked sample sent from the NRC Reference Laboratory in June 1986 are listed in Table No. 1; comparison criteria are given in Attachment 1.
The licensee achieved all agreement (Closed)
Open Item (50-315/85037-02; 50-316/85037-02):
Licensee to take positive steps to obtain daily water samples from public water supply intakes.
In December 1985, the Plant Manager, Plant Chemistry Supervisor and Environmental Section Supervisor met with the New Buffalo Mater Department Supervisor to resolve the problem of missed samples.
The licensee provided sample collection bottles, and instated a procedure to call the New Buffalo Plant daily, to remind the personnel there to take samples.
No subsequent samples were missed.
In 1986, the licensee was issued Amendment No.
94 to the operating license for Unit 1 and Amendment No.
80 to the operating license for Unit 2 which eliminated the New Buffalo sampling requirement.
(Closed)
Open Item (50-315/85037-03; 50-316/85037-03):
Licensee to investigate causes of elevated levels of H-3 in onsite wells and provide results to Region III within six months of this inspection.
On July 1, 1986, the licensee reported to the NRC Senior Resident Inspector the results of their investigation which showed that interferences from organic contamination in the samples caused apparent but not real elevated levels of tritium.
Upon additional purification of the samples, background tritium levels were obtained.
This problem has not recurred.
(Open)
Open Item (50-315/85040-01; 50-316/85040-01):
Licensee to provide management oversight and training of chemistry technicians to improve laboratory practices.
Licensee reported that the four chemistry supervisors have spent about 33%%u.'f their time providing management oversight of the performance of the chemistry technicians, including training them in new techniques using new instruments such as the ion chromatograph.
The inspectors observed generally improved laboratory practices by technicians during this inspection.
However, the poor practice of recording original measurement data on small pieces of paper continued to be used.
This was discussed with the technicians and also during the exit interview.
Licensee representatives stated that a more appropriate method of recording data would be instituted.
This will be reviewed during a subsequent inspection.
(Open)
Open Item (50-315/85040-02; 50-316/85040-02):
Licensee to consider modification of boron analysis procedure to include one or more standard solutions and to check on effects of pipetting techniques procedure on analytical accuracy.
The licensee is now using a second boron standard in the 1000 ppm range for performance checks.
He has obtained a volumetric flask for increased transfer accuracy and has ordered an automatic titrator which will offer an alternate method of improving accuracy.
This item will remain open until the licensee decides on the method to be used and modifies the applicable procedure
THP 6020 LAB.003, "Determination of Boron" accordingl,
h.
(Cl osed)
Open Item (50-315/85040-05; 50-316/85040-05):
Review technician performance in analyses of gA/gC unknown samples for non-radiological chemistry.
The inspectors examined results of blind samples analyzed by chemistry technicians and discussed the program with a chemistry supervisor.
The results of EPA supplied unknowns were in complete agreement for 1985 and 1986.
Agreements with the values from Environmental Resource Associates (ERA) and licensee prepared blind samples has significantly improved.
Chemistry supervision stated that these results are reviewed to determine what future actions may be taken to further increase accuracy.
Mana ement Controls Or anization Trainin and ualifications f.
(Closed)
Open Item (50-315/85040-03; 50-316/85040-03):
Licensee to upgrade gA/gC program to include control charts on chemical analyses.
The licensee has instituted the use of control charts for non-radiological chemical standard solutions analyzed along with routine samples.
g.
(Closed) Violation Severity Level V (50-315/85040-04; 50-316/85040-04):
Licensee failed to perform quarterly unknown boron analyses by chemical technicians and failed to test the technicians for reliability of analytical procedures.
The inspectors reviewed log sheets showing that each technician performed quarterly unknown boron analyses during 1986 to date of this inspection.
The technicians are also provided intralaboratory samples and interlaboratory spiked samples to analyze to check the reliability of procedures and technicians performance.
No changes in management controls and staffing organization in chemistry have occur red since a previous inspection.
Four chemistry supervisors, a chemist, a performance engineer, and 18 technicians report to the Plant Chemistry Supervisor.
Six contract technicians are also available to perform routine chemical analyses.
The staffing appears sufficient in numbers to perform the necessary sampling and analyses of plant systems.
The inspectors discussed the new chemistry training programs with licensee representatives.
The licensee has developed 51 lesson plans involving 200 tasks for the technicians to perform.
Formal lectures and on-the-job laboratory tasks for the technicians to perform began in the Spring of 1986. 'ualification cards for each technician have been established.
Chemistry management maintains a complete printout showing a profile of individual tasks for the qualification cards each technician has completed.
In this manner management keeps current as to the progress of each technician in completing the cards.
The inspectors reviewed selective qualification cards for technicians and identified no problems.
The revised chemistry training program has improved, to some degree, the proficiency of the technicians and provided for upgrading their sampling and laboratory practices as evident from inspector's observations of
~Inspection Reports No. 50;315/85037; No. 50-316/8503 improved technicians performance in the sampling and analysis of non-radiological samples.
(See Section 7)
The licensee is seeking INPO accreditation of the chemistry training program in the Fall of 1986.
In view of a number of licensee-identified problems in the REMP during the past year, the licensee appointed an environmental coordinator at the plant to manage the REMP on a day-to-day basis.
No violations or deviations were identified.
4.
Water Chemistr Control Pro ram As discussed in a previous inspection~ the licensee has established and is adequately implementing a secondary water chemistry control program in accordance with the requirements in Sections 2,C.3.M and 2.C.7 of the Operating Licenses for Unit 1 and Unit 2, respectively.
This program is summarized in,procedure PMI-6020, "Chemical/Radiochemical Control Program,"
Revision 1, July 16, 1985, and further detailed in the following chemistry procedures (12 THP 6020.-):
LAB.037, "Techniques of Liquid Sampling" LAB.041,
"Data Sheet Instructions" LAB.100, "Laboratory Surveillance Requirements" These procedures address the major elements of the Steam Generators Owners Group guidelines including assignment of authority, administrative and technical specification limits, performance monitoring of the program, documenting data, logging and trending of results, and action levels for the licensee to take when monitored chemical parameters are confirmed to be outside the normal operating values.
The inspectors determined that there is close cooperation between the Operations Department and the Chemistry Department staff in maintaining tight controls on plant water chemistry.
'nit 1 was operating at 90K power level and Unit 2 at 80K power level owing to derating caused by plugged steam generator tubes.
Licensee representatives indicated that there had been no difficulty in maintaining the required chemistry parameters in the primary reactor coolant of either unit.
The inspector's review identified no instances where regulatory limits were exceeded.
The inspectors noted during review of trend plots of different chemical parameters in the secondary system that the licensee effectively improved his control of secondary chemistry from 1984 through 1986.
This was indicated by the reduction of the number of hours when administrative chemistry limits were exceeded during each year.
At such times the licensee effectively implemented the necessary corrective Action Levels on plant operation as presented in LAB.041 until the desired secondary
~Inspection Reports No. 50-315/85040; No. 50-316/85040
chemistry was obtained.
The licensee is using boric acid in the secondary side to neutralize caustic that may be present in the steam generators.
The use of boric acid is considered important in reducing SG tube degradation.
The licensee has established a Steam Generator Morking Group which meets monthly at the plant to discuss the status of water chemistry quality and to recommend methods and actions to take to minimize stress corrosion and intergranular attack of the steam generators.
This group has been meeting since 1983 and as a result of the group's recommendations, the licensee has been able to improve plant performance over time.
However, the group has concluded that degradation of SG tubes is much more extensive based on eddy current tests, and rate of deterioration higher than originally expected.
One action under consideration is the possible replacement of all four SGs in Unit 2 in the next few years.
The licensee is well aware of the importance of water chemistry control and appears willing to expend the necessary efforts to assure the long-term reliability of plant operations.
No violations or deviations were identified.
Plant S stems Affectin Plant Mater Chemistr The inspectors discussed the makeup water treatment system with licensee representatives and the changes to the system to improve water quality.
The inspectors toured the current makeup water system and observed the various components used in treating Lake Nichigan water before it is used as makeup to the plant.
The system consists of cation, anion, and mixed bed demineralizers, char'coal filters to remove organics, an alum system, and other components.
Problems of the makeup plant have been identified including shrinking resin beads from cold water, thereby reducing capability for demineralization; inadequate alum feed system requiring excessively high maintenance; caustic and acid cabinet material condition resulting in a personnel hazard; and low inaccurate conductivity readings since flow cells are not temperature compensated.
The licensee has identified 51 items to upgrade the makeup plant system.
The changes to be made are based on the following criteria:
(1) water quality; (2) equipment reliability; and (3) water quantity.
The changes are to be completed by end of 1987.
Changes such as improved monitoring capability, resin fines filter, retention tank level control will be reviewed in subsequent inspections (Open Item 50-315/86031-01; 50-316/86037-01).
A licensee representative reported that all condensers including those on the turbine driven auxiliary feed pumps have been retubed with stainless steel.
Subsequent to the retubing the licensee has seen no in-leakage of lake water into the condensers.
Sampling has shown less than 5 ppb sodium and dissolved oxygen in the hotwell condensate.
The licensee reported that makeup plant upsets appear to be the largest contributing factors to chemistry upsets now that the Unit 1 condensers have been retubed.
No violations or" deviations were identifie 'ater Sam lin and Monitorin The inspectors reviewed the sampling and monitoring programs during a tour of the plant.
The inspectors observed a technician collecting samples from the Normal Sampling System (NSS) in the Sampling Room in which both, the primary and secondary sides are sampled in a large hood.
The two sides are separated in the hood to avoid cross contamination of samples.
The technician was very careful to avoid sample contamination during the sampling process.
The technician seemed knowledgeable and skilled in operations of the NSS.
All sample bottles were rinsed with demineralized water and dried before the technician placed the bottle in the sampling rack.
The only problem noted during the extended observation was the recording of original measurement data on small pieces of paper rather than in logs or on prepared data sheets.
This practice required subsequent transfer of the data to permanent records.
As noted in Section 2d, this poor practice is in common use throughout the laboratory, and licensee corrective actions will be reviewed in subsequent inspections.
The licensee has installed new in-line conductivity and dissolved oxygen monitors for monitoring feedwater, condensate and blowdown systems.
Monitoring capability exists for the condensate hotwell and the SG blowdown with alarms and recorders in the control room.
The licensee has plans underway to install hydrogen, sodium, pH and other monitors and establish a Chemistry Data Acquisition Center designed to monitor 150 parameters at different sampling locations.
This center is to be established in 1987.
This item will be examined in a subsequent inspection (Open Item 50-315/86037-02; 50-316/86037-02).
No violations or deviations were identified.
7.
Chemistr and Radiochemistr Laborator Facilities Procedures and
~0erat> ona The inspectors reviewed the chemistry and radiochemistry programs including the physical facilities, laboratory operations, and procedures in the laboratory.
No changes in space and facilities have occurred since the previous inspection.3 The licensee added new instrumentation to the laboratory, including a Dionex Ion Chromatograph (IC) to measure anions and a Total Organic Carbon unit to measure organics in water systems.
In addition a graphite furnace used with the Perkin-Elmer Atomic Absorption Spectrophotometer serves to provide sensitive metal analyses.
These instruments are used by the technicians for routine analyses.
The inspectors observed several technicians analyze samples containing boron, chloride, fluoride, ammonia, hydrazine, trace metals, and conductivity.
The technicians followed procedures and were well 3Ibi d
acquainted with each step of the procedure used in the analysis.
Instruments used in'the analyses were properly calibrated with current calibration stickers.
No chemical reagents used were found with expired labels.
Standardized solutions were used for performance checks and calibrations to assure high quality analyses were performed.
One of the technicians observed analyzing for hydrazine had to begin the analysis over after making mistakes on the first set of samples.
His laboratory techniques appeared to need improvement.
He had only about a year's experience in the laboratory and needed additional training to assure himself of obtaining a valid result for each analysis.
In general, however, the inspectors noted that the licensee has made considerable progress in improving laboratory practices.
The licensee is emphasizing training for technicians to learn new techniques and upgrade their laboratory practices through the use of qualification cards for each technician.
Selected, recently reviewed chemistry procedures (12 THP 6020) for various analyses and sur veillances, listed below, were reviewed and found current.
The procedures reviewed included:
LAB.011, LAB.037, LAB.066, LAB.100, LAB.103, LAB.121, LAB.134, LAB.138, LAB.149, LAB.160,
"Measurement of Conductivity"
"Techniques of Liquid Sampling"
"Operation and Calibration of the Automatic Gas Analyzer"
"Laboratory Surveillance Requirements"
"Monitor Tanks and Waste Evaporation Condensate Tank Compositing"
"Operation and Calibration of Beckman Oxygen Analyzer"
"Chemical Section Training"
"Low Range Boron by Use of the Fluoroborate Selective Ion Electrode"
"Operation of the Dionex 210li Ion Chromatograph"
"Standardization and Use of the Perkin-Elmer 303 Atomic Absorption Spectrophotometer for Elemental Analysis" No problems were noted in their review.
No violations or deviations were identified.
8.
ualit Assurance/ ualit Control of Anal tical Measurements gA/gC is procedurally controlled by 12 THP 6020. LAB.044, "Laboratory equality Control," Revision 7.
The licensee initiated the use of control charts for non-radiological analyses in January 1986 as a result of
, weaknesses observed during a previous inspection.4 The inspectors reviewed these control charts which were found to be current and complete.
Appropriate warning and control limits are used on these charts.
41bi d
The licensee currently tests technician proficiency by using unknown samples prepared by ERA, EPA, and a Chemistry Supervisor.
The Chemistry Supervisor supplies technicians unknowns covered by laboratory procedures one week before they resume work in the chemistry laboratory to determine proficiency.
In addition to routine chemistry supplied samples, quarterly tests of T/S related parameters and annual tests of National Pollution Discharge
'limination System (NPDES) samples are also analyzed.
The inspectors examined these results which are discussed in Section 2. g and 2. h.
The licensee has initiated trend plotting of analytical results vs.
concentrations, to follow technician proficiency, and stated that these will continue.
The use of control charts for analytical measurements and the increased proficiency of technicians in analyzing unknown samples indicate a
positive attitude on the part of both supervision and technicians.
This attitude is reflected in the improvement of the program since the last inspection.
No violations or. deviations were identified.
Radiolo ical Environmental Monitorin Pro ram (REMP)
The inspectors reviewed the REMP section of the 1985 Annual Environmental Operating Report and quarterly reports for 1986 to ensure compliance with T/S Section 3/4. 12 and 6.9. 1.7 (Amendment 69, effective date April 13, 1983).
The report properly documented the licensee's difficulty in obtaining the required daily collections of water samples from the public water supply intake at New Buffalo and its subsequent resolution (Section 2).
Two problems were noted with the implementation of the REMP program in 1985:
(1)-on four occasions in 1985 (2/2 to 2/23/85; 6/22 to 7/13/85; 10/5 to 10/26/85; 12/7 to 12/28/85) the licensee failed to collect milk samples within the time frame required in T/S Table 3.12-1; and (2) the licensee's analysis of lake and drinking water samples throughout 1985 exceeded the Lower Limits of Detection (LLD) specified for 13 out of 14 radionuclides listed in T/S Table 4. 12-1.
These failures constitute a
violation of T/S 4. 12. 1 which requires that environmental samples be collected pursuant to T/S Table 3. 12-1 and analyzed at LLD values in Table 4.12-1.
The problems were documented in the 1985 Annual Radiological Environmental Operating Report and a Special Report dated May 1, 1986.
However, the licensee's identification of the problems was not timely in that they were not recognized until early 1986 when the Annual Report was being compiled; nor were they identified in licensee audit r
The licensee has taken appropriate correction actions to resolve these problems involving:
(1)
Selection of an individual at the, plant to provide management oversight of the REMP; (2)
Preparation of Procedure PMP 6010. RAD.005 "Radiological Environmental Monitoring Programs, Revision 0, approved July 31, 1986 which describes responsibilities for implementing the REMP; (3)
Transfer of the analysis of drinking water samples from the licensee's Chemistry Department to the licensee's environmental contractor, Controls for Environmental Pollution (No problems have since been noted with CEP achieving the required LLD values);
(4)
Collection of environmental samples by plant personnel starting November 1, 1986; (5)
Training of CEP sample collector in Spring 1986 to collect samples as specified in T/S 3. 12-1 (No problems have been noted in missing samples in 1986.
With these actions taken, no reply to the violation is required.
The 1986 quarterly reports reviewed showed the effect of the Chernobyl accident on the results.
There was no impact on the environment from operation of the plant.
The inspector also reviewed 13 sample collection procedures and identified no problems.
The procedures (12 THP 6010.RAD.001 to.052) were current having been approved by the Nuclear Safety and Design Review Committee (NSDRC) and Plant Manager in 1985 and 1986.
The inspector inspected four air samplers and found that one had a crimped plastic tubing connecting the vacuum pump and dry gas meter.
This was repaired prior to the inspector leaving the plant site.
All samplers observed were operable and no leakage of the filter trains was observed.
Each air sampler had a calibration sticker stating that it had been calibrated on a prescribed annual frequency.
Thermoluminescent dosimeters were also placed properly.
One violation was identified.
Licensee Internal Audits The inspectors reviewed equality Assurance Audit No. (A-86-23, "Chemical/
Radiochemical Control Program,"
conducted between July 2, 1986 and August 28, 1986.
The report identified deviations/nonconformances resolved during the investigation and conditions which required corrective and/or preventive actions.
Responses were received by the gA Department from the Technical-Physical Sciences Department (Chemical Section) within the proper time frame during the inspection.
Corrective or preventive actions will be followed up by the gA Department.
Nuclear Safety and Design Review Committee (NSDRC) Audit No. 120,
"D.C.
Cook Nuclear Plants Radiological Environmental Monitoring QA Program,"
conducted September 9-12, 1985, was reviewed by the inspectors.
The audit revealed three (3) areas of concern with respect to procedural requirements and contained six (6) recommendations to improve the program.
As a result of concerns raised by the audit a followup audit was scheduled in approximately three to six months.
NSDRC Audit No.
126 conducted March 24-27, 1986 addressed, in part, followup to Audit No.
120 above.
The audit indicated a complete turn around and significant improvement over what was found during the original audit.
No violations or deviations were identified.
0 en Items 12.
Open Items are matters which have been discussed with the licensee, which will be reviewed further by the inspectors, and which involve some action on the part of the NRC or licensee or both.
Open Items disclosed during the inspections are discussed in Sections 5 and 6.
Exit Meetin The inspectors reviewed the scope and findings of the inspection with licensee representatives denoted in Section 1 at the conclusion of'he inspection on October 9, 1986.
The inspectors noted that weaknesses identified in the previous inspection for implementation of the QA/QC for non-radiological chemistry have been resolved to a great degree during the past year.
The licensee has made improvements in implementing a good QA/QC program in non-radiological chemistry.
In response to inspectors'omments the licensee agreed to:
Improve recording of original data in log books (Section 7).
Continue improved implementation of the REMP to avoid past problems and violations (Section 9).
During the inspection, the inspectors content of the inspection report with reviewed by the inspectors during the representatives did not identify such proprietary.
discussed the likely informational regard to documents or processes inspection.
Licensee documents or procedures as Attachments:
1.
Table 1, Confirmatory Measurements Program 2.
Criteria for Comparing Analytical Measurements
\\
TABLE
U S t43CLcAR PEGULATORY CONtitISSIOtl OFFICE OF INSPECTION AND ENFORCEt1ENT CONFIPf'fATORY YEASUREtfEf'>TS PROGRAfi1 FACILITY: D C COOt'OR THE 2 QUARTER OF 1986
filRC LICEfdSEE -LICENSEE: NRC SAt fPLE ISOTOPE RE= ULT ERROP, RESULT EPPOP. 'ATIO RES, T
L MASTE H-3 FE-55 SP,-89 SR-90 9. 0E-P~
6. 7E-05 1. 1E-04 1. 1E-05 2. OE-06 1. 'E-06 3. OE-06 4. OE-07 1. 1E-04 5. 6E-05 1. 1E-04 1. 1E-05 1. 7E-06 2. 8~-06 1.1E-05 5. 6E'-07 1.2E 00 4.5E pi A
B. 4E-0 i 5. 1E
A 9.7E-pi 3. BE 01 A
1.1E
2.7E
A T TEST PESULTS:
A=AGREEMENT D= DISAGREEf>1E)IT
>>:=CR EPIA RELAXED f9=fi t~lPARI SOfd
ATTACHMENT 1 CRITERIA FOR COMPARING ANALYTICALMEASUREMENTS This attachment provides criteria for comparing results of capability tests and verification measurements.
The criteria are based on an empirical relationship which combines prior experience and the accuracy needs of this program.
In these criteria, the judgment limits are variable in relation to the comparison of the NRC's value to its associated one sigma uncertainty.
As that ratio, referred to in this program as "Resolution", increases, the acceptability of a licensee's measurement should be more selective.
Conversely, poorer agreement should be considered acceptable as the resolution decreases.
The values in the ratio criteria may be rounded to fewer significant figures reported by the NRC Reference Laboratory, unless such rounding will result in a narrowed category of acceptance.
RESOLUTION RATIO = LICENSEE VALUE/NRC REFERENCE VALUE
~Aeeement 4-
8-
16
51 " 200 200 "
0.4
" 2.5 0.5
- 2.0 0.6
- 1.66 0. 75 1. 33 0.80 - 1.25 0.85 - 1.18 Some discrepancies may result from the use of different equipment, techniques, and for some specific nuclides.
These may be factored into the acceptance criteria and identified on the data shee