IR 05000352/1986010
| ML20211C487 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 06/04/1986 |
| From: | Pasciak W, Zibulsky H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML20211C467 | List: |
| References | |
| 50-352-86-10, NUDOCS 8606120325 | |
| Download: ML20211C487 (5) | |
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U.S. NUCLEAR REGULATORY COMMISSION
REGION I
Report No.
50-352/86-10 Docket No.
50-352 License No. CPPR-106 Priority
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Category B
Licensee: Philadelphia Electric Company 2301 Market Street Philadelphia, Pennsylvania 10 Q'
Facility Name:
Limerick Generating
+at h a Jnit 1 Inspection At:
Limerick, Pennsylvania Inspection Conducted: May 19-21, 1986 Inspectors:
b-DD H. Zibu s mist date
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Approved by:
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m 6, M fb W. J.
sciak, Chlef, Effluents Radiation
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dag'e Prote ion Section, DRSS Inspection Summary:
Inspection on May 19-21, 1986 (Report No. 50-352/86-10)
Areas Inspected: Routine, announced inspection of the nonradiological chemistry program. Areas reviewed included measurement control and analytical procedure evaluations.
Results: No violations were identified.
8606120325 860605 PDR ADOCK 05000352
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DETAILS 1.
Individuals Contacted J. Wiley, Senior Chemist J. Sabados, Supervisory Chemist J. Rogan, Supervisory Chemist (Corporate)
E. Frick, Chemist.
All were present at the exit interview.
The inspector also interviewed other licensee employees including members of the Chemistry staff.
2.
Action on Previous Licensee Findings
(Closed) 50-352/84-58-01 IFI - Control standards were not used or documented on control charts. The licensee has generated and are
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utilizing control charts.
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(0 pen) 25-00-13 TI - The inspection covered part of this item. Of the two modules included in the TI, Module 79501 was completed.
3.
Measurement Control Evaluation The licensee's measurement control program will be verified through l
analysis of actual plant water samples.
Samples from the boric acid l
storage tank, demin water and Ultrex were taken and duplicate samples
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were sent to Brookhaven National Laboratory (BNL) for independent verification..The licensee will determine boron on the storage tank by specific gravity and BNL will determine the boron by the mannitol titration method. Metal analyses will be performed on the demin and Ultrex samples. On completion of the analyses by both laboratories, a statistical evaluation will be made (Inspector Follow-up Item
- 1-352/86-10-01).
The inspector reviewed the measurement control charts. Some of the charts were generated with an arbitrary 110% acceptance criteria. The inspector recommended a 1 2 sigma alert criteria and a ! 3 sigma acceptance parameter as was discussed in report number 50-352/84-58.
It was also suggested that more control charts be generated for those analytes whose parameters are mentioned in the fuel warranty and vendor requirements. The licensee agreed to generate the necessary control charts.
4.
Analytical procedures Evaluation During the inspection, standard chemical solutions were submitted by the
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inspector to the Itcensee for analysis.
The standard solutions were prepared by BNL for NRC Region 1, and were analyzed by the licensee using
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normal methods and equipment.
The analysis of standards is used to verify the various plant systems with respect to Technical Specification
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and other regulatory requirements.
In addition, the analysis of standards is used to evaluate the licensee's analytical procedures with respect to accuracy and precision.
The results of the standard measurements comparison indicated that six out of fourteen comparisons were in disagreement under the criteria used for comparing results (see Attachment 1).
The disagreements were copper, nickel and chromium analyzed with the direct current plasma emission spectrometer.
The disagreements occurred with the samples that were diluted ten times more than the samples that were in agreement. The licensee will investigate the reason for the disagreements.
Two possibilities will be explored.
Either the calibration standard used was too high a concentration for the NRC standards or the demin water used for dilution was contaminated.
Split samples of the demin water were taken for analyses of the metals.
More NRC blind samples will be submitted to the licensee for analyses when their investigation is completed (Inspector Follow-up Item
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50-352/86-10-02). A comparison wasn't made on a chloride analysis because the result was less than the licensee's lowest standard.
5.
Exit Interview The inspector met with the licensee representatives (denoted in paragraph 1) at the conclusion of the inspection on May 21, 1986, and summarized the scope and findings of the inspection. At no time during this inspection was written material provided to the licensee by the inspector.
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Capability Test Results l
' Limerick Generating Station, Unit 1 Chemical Ratio Parameter NRC Value Lic. Value (Lic./NRC)
Comparison l
l Results in parts per billion (ppb)
Chloride 20.6+1.4
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69.713.0 65.712.1 0.94 0.05 Agreement
27.712.8 28.012.0 1.0 Agreement Iron 51.213.6 59.411.4 1.1610.09 Agreement 13.710.8 13.911.6 1.0 Agreement
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9.610.4 9.5-0.9 1.0 Agreement Copper 53.210.4 57.512.7 1.0820.05 Agreement 15.410.2 41.211.5 2.68 Disagreement 10.410.2 26.612.5
.2.56 Disagreement
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Nickel 52.816.4 60.711.3 1.1510.14 Agreement 15.210.3 23.110.7 1.52 Disagreement 10.310.5 16.210.7 1.57 Disagreement Chromium 48.014.0 59.510.6 1.2410.10 Disagreement 15.011.1 18.010.7 1.20 0.10 Agreement
10.810.2 12.810.8 1.1910.08 Disagreement i
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o A T TACllMENI Criteria For Comparing Analytical Measurements
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This attachment provides criteria for comparing results of capability tests.
In these criteria the judgement limits are based on the uncertainty of the ratio of the licensee's value to the NRC value.
The following steps are performed:
(1) the ratio of the licensee's value to the NRC value is computed Licensee Value (ratio =
NRC Value
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(2) the uncertainty of the ratio is propagated.I If the absolute value of one minus the ratio is less than or equal to twice the ratio uncertainty, the results are in agreement.
(ll-ratiol 2 2 uncertainty)
Z=, then Szz = Sx2 + sy2 Z2 x2 y2 (From: Bevington, P. R., Data Reduction and Error Analysis for the Physical Sciences, McGraw-Hill, New York,1969)
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