IR 05000315/1990012
| ML17328A314 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 06/27/1990 |
| From: | Holtzman R, House J, Schumacher M NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML17328A313 | List: |
| References | |
| 50-315-90-12, 50-316-90-12, NUDOCS 9007100048 | |
| Download: ML17328A314 (21) | |
Text
'
U.S.
NUCLEAR REGULATORY COMMISSION
REGION III
Report Nos.
50-315/90012(DRSS);
50-316/90012(DRSS)
Docket Nos. 50-315; 50-316 Licensee:
Indiana Michigan Power Company 1 Riverside Plaza Columbus, OH 43216 License Nos.
D.
C.
Cook Nuclear Plant, Units 1 and
Inspection At:
D.
C.
Cook Site, Bridgman, Michigan Inspection Conducted:
June 5-8, 1990 (On-site)
June 14-21, 1990 (Telephone discussions)
Inspectors:
R. B.
t an l~
J.
E.
ouse ag.
Approved By:
M.
C.
humacher, ief Radiological Controls and Chemistry Section Da e
Date Date Ins ection Summar Ins ection on June 5-8 and 14-21 1990 Re ort Nos.
50-315/90012 DRSS
~/>>
including procedures, organization, and training (IP 84750; 79701); (2) primary and secondary systems'ater quality control programs (IP 84750; 79701); (3)
quality assurance/quality control program in the laboratory (IP 79701); (4)
nonradiolgical confirmatory measurements (IP 79701); (5) the radiological environmental monitoring program (REMP) (IP 84750);
and (6) the radiological confirmatory measurements program (IP 84750).
Results:
The licensee's water quality control program was generally good.
While the plant primary and secondary water standards generally conform to the EPRI Guidelines the concentrations in the secondary systems were somewhat elevated to 5 and 7 ppb for chloride and sulfate, respectively.
The trend chart formats have been greatly improved to better demonstrate system parameter trends.
The laboratory gA/gC programs were also improved and the nonradiological confirmatory measurements w'ere generally good.
The REMP was operating satisfactorily.
The inspectors noted the fol.lowing strengths and weaknesses:
Strengths:
Boric acid addition to Unit 1 secondary system.
Testing of environmental contractor laboratory with blind duplicate samples.
Weaknesses:
High Chemical Technician turnover.
Elevated levels of chloride and sulfate in secondary water.
No violations or deviations were identifie DETAILS 1.
Persons Contacted A. A. Blind, Plant Manager, D.C.
Cook (DCC)
~L.
S. Gibson, Mgrl/Assistant Plant Manager, DCC
~J. Wojcik, Technical Physical Science (TPS)/Superintendent.DCC K. Haglund, TPS/General Chemical Supervisor',
DCC
~D.
Loope, TPS/Plant Radiation Protection Supervisor, DCC S.
McLea, TPS/Chemical Supervisor, DCC D. Fitzgerald, TPS/Environmental Coordinator, DCC J.
Oetken, TPS/Environmental Technician, DCC D. Noble, TPS/Health Physicist, DCC B.
A. Jepkema, Site gA, AEPSC
~K. Vogel, Acting Chemical Supervisor, DCC
~D. Foster, Radiation Material Control Specialist, TPS, DCC
~L.
Umphrey, Administrative Compliance Coordinator, TPS, DCC
'B.
L. Jorgensen, Senior Resident Inspector, NRC The inspectors also interviewed other licensee personnel in various departments in the course of the inspection.
Present at the Exit Meeting on June 8, 1990.
Telephone discussions held during period of June 14-21, 1990 2.
Licensee Action on Previous Ins ection Findin s (IP 92701)
(Cl osed)
Open Item (50-315/88010-04; 50-316/88010-04):
Licensee to consider improvements in the laboratory gA/gC program:
calculate limits more frequently, better control chart assessment and use of gC data sheets for each analysis.
The licensee has further developed the laboratory gA/gC program with the imple-mentation of gC data sheets, independent standards, multipoint calibration curves, and regular maintenance of the charts and other parts of the program.
This program will be followed in subsequent routine chemistry inspecti.ons (Section 7).
b.
(Closed)
Open Item (50-315/89003-01; 50-316/89003-01):
Analyze spiked sample supplied by the NRC for Sr-89, Sr-90 and Fe-55 and report the results to Region III.
Since the licensee did not receive the sample and a
new split liquid radwaste sample was taken during this inspection, this Item is considerd closed.
.(Section 6)
'
(Cl osed)
Open Item (50-315/89019-01;50-316/89019-01):
The 1 icensee considered improvements in the chemistry parameter trend charts and submitted a letter to Region III.
In the letter of July 31, 1989, the licensee noted that the presently-used Chemistry Monitoring Computer Program (CMCP) will be modified to produce long-term trend charts, while a new system is being planned.
The expanded time spans of the trend charts reviewed during this inspection were substantially improved over previous ones.
d.
(Closed)
Open Item (50-315/89019-02; 50-316/89019-02):
The licensee spiked reactor water with anions, split the samples with Brookhaven
. National Laboratory (BNL), analyzed them and sent the results to Region III.
The comparison in Table 1 shows two agreements in three analyses.
The comparison criteria are given in Attachment l.
All three analyses showed positive biases with respect to the BNL values, possibly due to calibration or contamination problems.
However, while we are not presently able to resolve the differences, a review of selected licensee records and the present interlaboratory data indicate that the licensee's analytical'data were generally reliable (Sections 6 and 7).
e.
(Closed)
Open Item (50-315/89019-03;50-316/89019-03):
The licensee was to establish parameters for the interlaboratory comparison program.
Licensee procedure
THP 6020 LAB.044 Revision 13, May 24, 1990 establishes the parameters for this program (Section 7).
f.
(Closed)
Open Item (50-315/89019-04; 50-316/89019-04):
The licensee to consider the testing the entire train'of the REMP air filter samplers for air inleakage.
The licensee revised the procedure
THP 6010 ENV.051, "Collection of Environmental Air Samples,"
Revision 2, September 4,
1989 to include testing of the filter train for air inleakage by blocking the filter face during operation.
3.
Mana ement Controls Or anization and Trainin IP 84750)
The management structure of the Chemical Section is essentially unchanged since the previous inspection in this area (Region III Inspection Report Nos.
(50-315/89019; 50-316/89019)).
The Section has four Chemistry Supervisors, a Chemical Training Specialist, Physical Science Specialist and a Sr.
Performance Engineer reporting to the General Chemistry Supervisor.
The laboratory has 25 plant (I&M) Chemical Technicians (CTs) and seven contract technicians.
Licensee representatives stated that there has been a high turnover of contractor technicians.
In order to reduce this, they have been authorized to and are replacing contract technicians with plant CTs.
Technicians in training are not allowed to work alone on a shift.
The inspectors observed the training laboratory and found it to be very well equipped and organized.
This facility is used to provide basic, continuing and advanced training for the CTs.
The CT testing program (Section 7) is performed in this laborator Licensee representatives stated that the CT training program is scheduled for presentation to the INPO board for reaccreditation in October 1990.
No violations or deviations were identified.
Mater Chemistr Control Pro ram (IP 84750
- a The inspectors reviewed the water chemistry control program which is based on 12 THP 6020. LAB.041, "Data Sheet Instructions,"
Revision 14, Nay 5, 1990, with the specifications for the various reactor systems contained in Appendix B, "Chemical Constituent Specifications."
These specifications conform to the Technical Specifications (T/S) requirements and to EPRI Steam Generator (S/G) Owners Guidelines for secondary system chemistry.
Primary system chemistry parameters are consistent with the EPRI Primary System Guidelines.
Secondary system water parameters measured by in-line monitoring systems include conductivity, pH, dissolved oxygen, hydrazine and sodium.
In-line automated gas phase monitors for measuring hydrogen and oxygen levels in the gas holdup tanks are being installed.
The monitoring systems are being u'pdated with new sensors, data recorders and digital readouts; the outputs are also available in the control room.
A gA/gC program has been implemented, and is being further developed for the in-line monitors for checking or standardizing them periodically against laboratory grab samples or other appropriate standardization methods.
Each monitor is entered into the system as its qualification procedure is completed.
The inspectors reviewed water quality trend charts for most chemistry and other parameters from both Units 1 and 2.
These were improved over those from the previous inspection (Region III Inspection Report Nos.
(50-315/89019; 50-316/89019)),
mainly in covering longer time spans and in better readability.
The values were generally within the plant specifications.
The plant is in the process of installing a new chemistry data management system which has improved capabilities for trending.
The plant uses boric acid chemistry in the Unit 1 steam generator (S/G) to reduce tube degradation.
The licensee, is evaluating its effect and the necessity of replacing these generators.
Boric acid is not used in the new S/Gs on Unit 2.
The inspectors noted their concerns about S/G, water quality; while the levels of chloride and sulfate are greatly reduced from the 10-15 ppb levels of several years ago, they are still running about 5 ppb for chloride and 7 ppb for sulfate.
This appears to be several times those, in similar plants, i.e., those lacking or not regularly using condensate and blowdown polishers.
One likely source appears to be makeup water which contains up to 3 ppb of these species; ingress through plant systems appears to have been eliminated, as a result of considerable
licensee efforts to check and reduce possible sources.
Licensee representatives noted these concerns.
No violations or deviations were -identified.
5.
Im lementation of the Chemistr Pro ram IP 79701 The inspectors reviewed the chemistry programs, including physical facilities and laboratory operations.
The hot laboratory has been refurbished and the general requirement for protective clothing has been eliminated.
Houskeeping was good and the benches appeared to be less crowded.
The cold laboratory is being refurbished and,,on completion, will become'part of the hot laboratory.
The laboratory appeared to be well equipped.
The inspectors observed several CTs analyze the confirmatory measurements samples on the ion chromatograph and the atomic absorption spectrophoto-meter.
They appeared to be generally knowledgeable about the work and followed the procedures.
The laboratory appeared to be operating well.
No violations or deviations were identified.
6.
Confirmator Measurements (IP 79701 84750)
a 0 Radiological The licensee split a liquid radwaste sample which will be analyzed for gross beta, gross alpha, Fe-55, Sr-89, Sr-90, and H-3 by the licensee and by the NRC Reference Laboratory, the Radiological Environmental Sciences Laboratory.
Results will be submitted to the Region III office for comparison.
This will be followed under Open Item Nos.
(50-315/90012-01; 50-316/90012-01)
.
b.
Nonradi ol ogi cal The inspectors submitted chemistry samples to the licensee for analyses as part of a program to evaluate the laboratory's capabilities to monitor nonradiological chemistry parameters in various plant systems with respect to various Technical Specification and other regulatory and administrative requirements.
These samples had been prepared, standardized, and periodically reanalyzed (to check for stability) for the NRC by the Safety and Environmental Protection Division of Brookhaven National Laboratory (BNL).
The samples were analyzed by the licensee using routine methods and equipment.
The samples were diluted by licensee personnel as necessary to bring the concentrations within the ranges normally analyzed by the laboratory, and run in triplicate in a manner similar to that of routine samples.
The results are presented in Table 2 with the criteria for agreement presented at the end of the table.
These criteria are derived from the BNL results of the present samples and the relative standard deviations (RSD) derived from
l the results of the 1986 interlaboratory comparisons from the various plant laboratories in the study (Table 2.1, NUREG/CR-5422).
The acceptance criteria were that the licensee's value should be within + 2 SD of the BNL value for agreement and between 2 and 3,
SD for qualified agreement.
The latter is considered an agreement, but indicates a considerable uncertainty in the assay.
The licensee determined ll analytes at three concentrations each.
Of the initial 33 analyses, 27 were agreements, of which 5 were qualified agreements.
qualified agreements included the middle chloride, low copper, middle sodium and low silica concentrations.
The six disagreements were the high chloride, middle iron, high copper, low and high sodium and the low hydrazine.
The sodium disagreements can be discounted possibly due to an apparent interference between lithium and sodium in the sample matrix.
In addition, the licensee does not analyze either of these species in the presence of the other.
The licensee prepared fresh calibration standards, recalibrated the instruments and repeated most of the analyses that were disagreements or had significant biases (see reruns, Table 2).
The four qualified agreements became agreements and the disagreements in the analyses for the chloride, iron, copper, sodium, and hydrazine became agreements.
Mith recalibration, the licensee achieved 31 agreements in 33 analyses (94/).
The inspectors discussed souces of error with licensee representatives including instrument calibration and quality assurance.
The results of the analyses were generally good.
No violations or deviations were identified.
7.
Im lementation of the A/
C Pro ram in the Laborator IP 84750 The inspectors reviewed the chemistry laboratory quality assurance program as specified by procedures
THP 6020 LAB.044, "Laboratory equality Assurance",
Revision 13, Hay 24, 1990 and 12 THP 6020 LAB.088, "equality Control of Counting Equipment",
Revision 10, May 10, 1990.
The inspectors noted that completed control charts were still removed from the instrument logbook making it more difficult for technicians to review the history of the analysis.
Control chart limits were set
.at + 3 standard deviations (SD) with warning limits at + 2 SD.
In this system, the laboratory personnel consider an assay to be out of control only when the control value is beyond
+ 3 SD.
By monitoring the control charts between
+
2 SD, biases can be detected and corrective action taken before th7s occurs.
Chart data included mean values and standard deviations, however, mean value lines were not on the charts.
Non-random behavior is more easily seen from these charts when the mean value line is present.
Licensee representatives agreed to leave at least one previous chart (or copy) in the logbook and to consider addition of the mean value line to the chart The inspectors reviewed selected control charts which were manually plotted.
Control charts for the ion chromatograph (IC) had standard deviations that were larger than would normally be expected.
The + 3 SD,control limit represented approximately
+ 30X of the mean value.
Licensee representatives stated that the IC is recalibrated only when the control value is beyond
+ 3 SD.
Other instruments must be calibrated
'or zeroed against a blank when used.
Infrequent calibration of the IC allows excessive instrument drift resulting in larger SDs than would occur with more frequent calibration.
Another problem with the IC that the inspectors noted, involved single point calibration.
Duplicate blank and 25 parts per billion (ppb) calibration standards are used to establish the calibration curve.
Alternative calibration methods discussed with licensee representatives included the use of multiple standards and the establishment of calibration linearity on a periodic basis; a single point calibration could be used on a routine basis.
The inspectors also discussed increasing the calibration frequency, collection of 20-30 new control data points and recalculation of the mean and SD values.
Licensee representatives agreed to consider this in order to decrease the SD and improve quality control of the IC.
The licensee's vendor-supplied interlaboratory comparison program is required by the laboratory gA program to be performed twice per year.
Data from the last two quarters of 1989 and the first quarter of 1990 indicated that approximately 68K of the analyses were within +
10%%uo and 22K of the analyses were beyond
+ 15/o of the reference value.
These biases indicate possible assay problems.
Licensee representatives stated that vendor quality assurance data was unavailable and that a different vendor program was being considered in which data from a group of participants would be provided.
In the absence of vendor quality assurance data, licensee performance cannot be objectively evaluated.
Performance in this ar ea will continue to be followed in subsequent inspections.
The Intralaboratory Comparison Program (technician performance tests)
described in the Laboratory equality Assurance Procedure appeared to be well managed.
A review of selected data indicated that technicians are undergoing adequate testing.
Progress in this area will be followed
.in subsequent inspections.
No violations or deviations were identified.
Radiolo ical Environmental Nonitorin Pro ram (RENP)(IP 84750 The inspectors reviewed the REMP, including the 1989 Annual Environmental Report, the maintenance records, and the air sampling stations.
The Annual Environmental Report appeared to comply with the REMP requirements.
All of the required samples were collected and analyzed,
except as noted in the report, and a perusal of the results showed them to be reasonable.
Licensee representatives appeared to closely monitor the vendor laboratory during sample collection and processing.
The licensee changed vendor laboratories in November 1989 from CEP to Teledyne, New Jersey.
Mith the new vendor, the licensee improved the environmental practices by using the results of the naturally-occurring K-40 and Be-7 nuclides, which are at fairly constant concentrations in some types of samples, such as fish, milk and vegetation.
These provide internal standards to improve the credibility of the analyses in which,all the other nuclides are less than the LLDs.
They have also been used in the duplicate blind sample program.
The licensee has found over the years measurable concentrations of tritium in monitor wells around the plant (within 1000, meters of the plant).
The activities in three of the wells, in which the H-3 was about 2000 pCi/liter (1989),
were attributed to plant operations.
Licensee representatives stated that prior to being replaced, the Unit 2 S/Gs, had high primary-to-secondary leakage rates, which resulted in high concentrations of H-3.
The water from leakage and S/G blowdown drained into the turbine room sump (TRS) which was monitored for radioactivity daily from that collected by a compositer; the radioactivity consisted mainly of H-3; and occasionally of low levels of Cs-137.
The. water was subsequently discharged to the "absorption" pond on.a dune southeast of
'he plant where it percolated through the sandy soil in the dir'ection of the lake.
After replacement of the S/Gs in 1988, the radioactivity concentrations dropped substantially in the TRS, while those in the wells dropped only slowly until the first two quarters of 1990 when they showed substantially decreased H-3 concentrations.
The limited response of the wells to the decreased H-3 levels appears to be due to the slow movement of water in the aquifer.
This aquifer appears to be limited in scope (UFSAR, 1985)
and does not recharge any residential wells; it thus appears that the associated groundwater does not provide a direct dose pathway to man.
This will be followed in a subsequent inspection under Open Item Nos. (50-315/90012-02; 50-316/90012-02).
The inspectors toured the air sampling stations around the plant and observed a licensee representative demonstrate the testing of the air samplers, i. e.
check the systems for operability, and leakage of the sampling train.
The sampling stations are. the same as in the previous report (Region III Inspection Report Nos.
(50-315/89019; 50-316/89019)).
The procedure had been revised to include a leakage test for the air filter train (Section 2.f).
The six air samplers observed appeared to be operating satisfactorily.
The maintenance and calibration records appeared to be complete.
Overall, the REMP appeared to be operating satisfactorily.
No violations or deviations were identifie 'udits and A
raisals (IP 84750)
The inspectors reviewed recent Corporate assessments of the REMP and chemistry programs, equality Assurance Audit Nos.: gA-89-05, March 23, 1989, qA-90-03, March 22, 1990, and gA-90-10.
On the REMP they identified that not all the blind duplicate samples required by the procedures were submitted to the vendor and many of those submitted were not of much use because they were below LLD.
The Environmental group is to submit modifications to the program by July 1990 to improve its usefulness.
The auditors appeared to address in good detai 1 the quality assurance problems of the chemistry and environmental program.
Items identified in the audits appeared to have been addressed in a timely manner.
No violations or deviations were identified.
~0en Items 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 inspection are discussed in Sections 6 and 8.
Exit Interview The scope and findings of the inspection were reviewed with licensee representatives (Section 1) at the conclusion of the inspection on June 8, 1990.
The inspectors discussed the Open Items in Section 2 along with observations on the quality control program, the secondary water chemistry trend charts, the cold chemistry confirmatory measurements, and the REMP.
During the exit interview, the inspectors discussed the likely informational content of the inspection report with regard to documents or processes reviewed by the inspectors during the inspection.
Licensee representatives did not identify any such documents or processes as proprietary.
Attachments:
1.
Table 1, Nonradiological Inter laboratory Split Sample Results, May 1989 2.
Attachment 1, Criteria for Comparing Analytical Measurements (Nonradiological)
3.
Table 2, Honradiological Confirmatory Measurements Results, June 5-8, 1990
. TABLE 1 Nonradiological Inter laboratory Split Sample Results D.G.
Cook Nuclear Plant, Units 1 and
May 1989 Anal-Analytical yte Method NRC Y+ SD Licensee X+SD Ratio Z+SD Compari-son
+2'D Reactor Coolant Concentration b
Fluoride SIE
=
23.6
+ 1.7 28.3
+
1.5 1.199
+ 0.107 A
+ 1.6 33.3
+
1.5 1.487
+ 0. 126 D
Sulfate IC 25.3
+ 1.8 27.7
+
2.1 1.095
+ 0'14 A
a.
Analytical method IC Ion chromatogphy SIE Specific ion electrode c.
BNL uncertainties were not determined; they are assumed to be 7X relative standard deviation.
b.
Comparison A
Agree D
Disagree
ATTACHMENT 1 Criteria for Com grin Anal tical Measurements This attachment provides criteria for comparinq results of the capability tests.
The acceptance limits are based on the uncertainty (standard deviation) of the ratio of the licensee's mean value (N) to the NRC mean value (Y), where (1)
Z = X/Y is the ratio, and (2)
S is the uncertainty of the ratio determined from the pII'opagation of the uncertainties of licensee's mean value, S,
and of the NRC's mean value, S
.
Thus, Sz Sz Sz z
x
+
y
,
so that V
V Sz S24 S
=Z e
"+~
z X2 Y2 The results are considered to be in agreement when the bias in the ratio (absolute value of difference between unity and the ratio) is less than or equal to twice the uncertainty in the ratio, i.e.
/
1 Z
/
2iS 1.
National Council on Radiation Protection and Measurements, A Handbook of Radioactivit Measurements Procedures, NCRP epor o.
,
econ
>>on,
,
ages
-
(see Page 324).
TABLE 2 Nonradiological Confirmatory Measurements D.C.
Cook Nuclear Plant June 5-8, 1990 Results Analyte Method Concn Rati,o
2
.
Acceptance Ranges
+ 2RSD
+ 3RSD Result Chloride A
IC B
C (Rerun)
B (Rerun)
C Sulfate A
IC B
C Iron G
AA/FU H
I (Rerun)
H Fluor ide A
SIE B
C
50
5-10
25
50 3-8
20
25
35 0.983 1.058 0 '97 0.960 0.884 0.893 0.947 1.006 1.074 1.049 1.000 0.980 1.168 1.014 0.910 0.875-1.125 0.875-1.125 0.875-1.125 0.933-1.067 0.917-1.081 0.926-1.074 0.917-1.081 0.926-1.074 0.895-1.105 0.895-1.105 0.900-1.100 0.904-1.096 0.903-1.097 0.903-1.097 0.903-1.097 0.813-1.187 0.813-1.187 0.813-1.187 0.900-1.100 0.879-1.121 0.895-1.105
F 879-1.121 0.895-1.105 0.842-1.158 0.868-1.132 0.867-1 '33 0.854-1.146 0.857-1.143 0.855-1.145 0.857-1.143 A
A+
D A
A Copper (Rerun)
(Reru'n)
Sodium (Rerun)
(Rerun)
G AA/FU H
I G
I J
AA/FU K
L J
AA/FL K
AA/FL
25
25
10
25
100 0.899 0.953 1.193 1.090 1.035 0.756 0.815 0.670 0.881 0.942 0.904-1.095 0.904-,1
~ 096 0.904-1.096 0'.904-1.095 0.904-1.096 0.863-1.137 0.859-1.141 0.862-1.138 0.863-1.137 0.859-"1.141 0.859-1.141 0.857-1.143 0.857-1.143 0.859-1.141 0.857-1.143 0.784-1.216 0.788-1.212 0.789-1.211 0.784-1.216 0.788-1.212 A+
A D
A A
D A+
D A
A Lithium J
AA/FL 800 K
1200 L
1700 1.051 1.056 1.044 0.859-1.141 0.859-1.141 0.868-1.142 0.788-1.212 0.788-1.212 0.787-1.213 Ammonia M
Spec N
500 1200 1800 0.998 0.990 1.042 0.902"1.098 0.902-1.098 0.902"1.098 0.856-1.147 0.856-1.147 0.856-1.147
'
Analyte Method Concn Ratio Acceptance Ranges Result
2
.
+ 2RSD
+ 3RSD Hydrazine P
Q R
(Rerun)
P Silica S
T U
(Rerun)
S Si 1 ica S
T U
Spec
20
10 Spec
50
50 Spec 200 400 600 1.176 0.922-1.078 0.888-1.118 D
1.035 0.922-1.078 0.888-1.118 A
1.033 0.922-1.078 0.888"1.118 A
1.049 0.922-1.078 0.888-1.118 A
1.114 0.906-1.094 0.859-1.141 A+
0.982 0.909-1.091 0.860-1.136 A
0. 996 0. 907-1. 093 0. 857-1. 143 A
1.020 0.906-1.094 0.859-1.141 A
1.112 0.906-1.094 0.859-1.141 A+
0. 984 0. 909-1. 091 0. 860-1. 136 A
0.997 0.907-1.093 0.857-1.143 A
/pm Boron D
Titr 1000 E
'000 F
5000 1. 001 0. 979-1. 021 0. 968-1. 032 A
1.002 0.979-1.021 0.968-1.032 A
1.012 0.979-1.021 0.968-1.032
.
A 1.
Methods:
Titr IC Spec AA/FL AA/FU-SIE Titration Ion Chromatography Spectrophotometry Atomic absorption spectrophotometry (flame)
Atomic absorption spectrophotometry (graphite furnace)
Specific ion electrode (mv meter)
2.
Conc: Approximate concentration analyzed.
3.
Ratio of Licensee mean value to NRC mean value.
4.
The SD in the fifth and sixth columns represents the coefficient of variation obtained from averaging licensee data from the preceding cycle (Table 2. 1 of NUREG/CR-5244).
A result is considered to be in agreement if it falls within the
+ 2 SD range; a qualified agreement if it lies outside
+ 2 SD, but within + 3 SD; and in disagreement if it is outside the
+
SD range.
5.
Result:
A
= Agreement:
Licensee value is within +2 SDs of the NRC mean value.
A+ = Qualified. agreement, licensee is between
+
2 and +3 SDs of the NRC value.
D
= Disagreement:
licensee value is outside
+
3 SDs.
NRC FQAM 758
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