ML20211M756

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Partially Withheld Insp Rept 70-1113/86-06 on 860317-21 (Ref 10CFR2.790(d) & 73.21).No Violations or Deviations. Major Areas Inspected:Measurement Control & Statistics & Licensee Action on Previously Identified Violations
ML20211M756
Person / Time
Site: 07001113
Issue date: 04/08/1986
From: David Jones, Mcalpine E
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
To:
Shared Package
ML20211M455 List:
References
FOIA-86-704 70-1113-86-06-0, 70-1113-86-6, NUDOCS 8612180041
Download: ML20211M756 (5)
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Report No.: 70-1113/86-06 Licensee: General Electric Company Wilmington, NC 28401 Docket No.: 70-1113 License No.: SNM-1097 Facility Name: General Electric Company Ir.spection Conducted: March 17-21, 1986 Irspector: M !Atw 7 h D. W. y nes, Statistician Date Signed A; proved by: M'b E. J. Mca pine, Chief,\ Material Control end 4/8N b Cate Signed Accountability Section, Nuclear Materials Safety and Safeguards Branch Division of Radiation Safety and Safeguards

SUMMARY

Scope: This routine, unannounced inspection entailed 31 inspector-hours during ncrsal duty hours inspecting measurement control and statistics, and licensee action on previously identified violations and unresolved items.

Results: No violations or deviations were identified.

8612180041 86t205 PDR FOIA PDR j RATNER 86-704

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      • %. w,, . . 2.y a his Docueent is not to be reproduced wi thout spees tg, approval *f18:12 REPORT DETAILS Reprt No. 70-1113/86-06
1. Persons Contacted .

Licensee Employees

  • R. L. Bruce, Specialist, Nuclear Materials Management
  • R. L. Church, Manager, Manufacturing Systems Operations
  • P. L. Denison, Specialist, Nuclear Materials Management
  • W. K. Kemp, Acting Manager, Fuel Manufacturing
  • G. R. Mallett, Senior Engineer, Mersurements and Statistics
  • T. P. Winslow, Manager, Licensing & Nuclear Materials Management The inspector also interviewed several other licensee employees.
  • Denotes those present at the exit interview,
2. Exit Interview The inspection scope and findings were summarized on March 21, 1986, with those persons indicated in paragraph 1 above. The licensee acknowledged the inspection findings and took no exceptions.

3.

Licensee Action on Previous Enforcement Matters (92702)

(Closed) Violation (84-14-01) Bias corrections based on improperly characterized standards. During the inspection conducted on October 1-5, i

1984, it was found that the licensee had adjusted SNM accounting records for enrichment measurement bias. However, the bias adjustment had been based on improperly characterized standards. During this inspection it was found that, as was indicated in the licensee's letter of response dated March 8, l 1985, the inappropriate adjustment had been deleted from the SNM accounting l

records. Also, as indicated in the licensees March a r CASAR 320-70.10) was issued to require It was determined that the proce re ad been imp emented, therefor , s item is closed.

l (Closed) Violation (84-14-02) Measurement equipment calibration based on improperly characterized standards. During the inspection conducted on October 1-5, 1984, it was found that the licensee had adjusted the l

analytical results produced by his enrichment analyzer based on improperly characterized standards. During this inspection, it was found, as indicated

' above, that the licensee had implemented a procedur uiri the adjustments to analytical results be based on results g Therefore this item is a so c osed.

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2 (Closed) Violation (84-14-03) Bias correcticns for measurement systems which involve curve calibrations not determined in accordance with the FNM; Plan.

During the inspection conducted on October 1-5, 1984, it was found that the licensee had not determin d measurement bias correction for systems which involve as specified in section 4.2.4.1 of his FNM plan.

The lic ter of response dated February 6, 1985, indicated that the FNM; Plan had been revised for clarification. The changes to the plan were submitted on January 10, 1985, and approved by NRC Region II letter dated April 12, 1985. During this inspection it was found that the bias for the licensee's enrichment measurements during the August 1984 - August 1985 material balance period had been evaluated at the mean of the measurements of process materials performed during the period as specified in the FNMC Plan. Therefore this item is closed.

(Closed) Violation (84-14-04) Bias correction determined incorrectly for the gravimetric analytical method. During the inspection conducted on October 1-5, 1984, the licensee's calculations of the effect of measurement biases on the plant ID were inspected. It was fo f effect from ric analytical metnod should have been Mr hich was used by the licensee.

rather than During this inspection it was found that as was indicated in the licensee's letter of response dated December 3,1984, a revised material balance report was issued on October 15, 1984, to correct the error. This item is closed.

4. Followup on Unresolved Items (97201)

(Closed) Unresolved Item (64-14-05) Application of current period measurement biases to materials on beginning inventory. During the inspection conducted on October 1-5, 1984, the licensee's method of determining the effect of measurement biases on the ID were inspected. It was found that measurement biases determined for the current period were applied to materials which were on the beginning inventory as well as those materials which were either received or shipped during the current period or on the ending inventory. However, the materials on beginning inventory would have been measured during the previous period and therefore the previous period measurement bias should apply. The licensee indicated that the effect of apolying current period rather than previous period biases to materials on beginning inventory would be negligible. The issue was deemed an unresolved item pending demonstration by the licensee that the effect is negligible. During this inspection the licensee indicated that, through staff discussions subsequent to the October 1-5, 1984 inspection, it was determined that the effect would be negligible but a documented demonstration would involve a significant effort. In that the licensee will soon be subject to the requirements of 10 CFR 74, in which the criteria for performing bias corrections is significantly relaxed, this item is closed.

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5. Measurement Control and Statistics (85209)

The licensee's statistical program for the evaluation of the biases and uncertainties associated with special nuclear material accounting measurements was inspected. The inspection consisted of an examination of the licensee's written procedures for performing the statistical calculations, the database used to evalu. ate the statistical parameters, and the statistical methods applied in the evaluation of the database. The performance of the program during the material balance period August 13, i 1984 through August 5, 1985 was inspected. The program data for the [

following statistical parameters were inspected: the biases, systematic d with th The licensee's written procedure L&NMMP 104, Rev. 8, " Determination of LEID" assigns responsibility for maintaining a Variance and Bias Manual. That manual contains descriptions of the measurement methods and the statistical methods used for evaluating rneasurement bias, systematic errors and random errors. Reference is revided to a com uter ooram specift ations package

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l The strata selected for review and their relative contribution to tne total variance of the U'" 10 are presented below.

1 Measurement Error i of Total Strata Variance Component Var. (U:" ID) i Systematic Analytica TRUSY001 TRUMR002 Randort Analytical TRUSR007 Random Sampling SCESY001 Systematic Analytical - Active Rod Scanner SCEMR001 Random Analytical - Active Rod Scanner .

For these systems the biases and systematic error variances were determined from measurements of standards and the random sampling and analytical error variances were determined for replicate measurements of process materials.

The databases were sufficient for obtaining the parameter estimates.

Appropriate mathematical models of the error structures were used to evaluate the databases in order to obtain the error variance estimates for th matic analytical error variance associated with the method. The systematic error variance should include e variance associated with the mean of the measurements of standards performed during the material balance period plus the variance associated with the uncertainty in the assigned value of the ard used to e the measurement system. The licensee included th

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rather than the variance associated with the mean of the measurements of standards. The licensee's calculation indicated the magnitude of t rtainty in the assigned value of the standard term to be of the orde the squa e of the estimated measurement bias term to be of the or Calculations performed by the inspector indicated that the nagnitud he variance associated wi mean of the measurements of standards term to be of the order in that the uncertainty in the assigned value of the standard te rly dominates the systematic error variance estimates the LEID would not have changed and no violation will be issued. The licensee's error variance calculations of other measurement systems will be reviewed during subsequent inspections.

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4 . .'.'. . MAY 0 21986 Genera' Electric Company ATTN: Mr. Eugene A. Lees. General Manager Nuclear Fuel and Component Manufacturing P. O. Box 780 Wilmington, NC 28402 Gentlemen:

SUBJECT:

REPORT NO. 70-1113.'86-07 On March 24-28, 1986, NRC inscected activities authoriced by NRC License No. SNM-1097 for your General Elec .ric Company facility. At tne conclusion of the inspection, the findings were discussed with those members of you* staff identified in the enclosec inspection report.

Areas examined during the inspection are ioentified in tne report. Within these areas, the insoection consisted of selective examinations of proceogres and representative records, interviews witn personnel, and observation of activities in prog-ess.

Within the scope of tne inscettion, no violations or deviations were identified.

In accorda'nce with 10 CFR 2.790(d) and 10 CFR 73.21. safeguards activities and security measures are exempt from oublic disclosure; tnerefore, the enclosures to this letter, with the exception of the report cover oage which presents a nonexempt summary, will ng be placed in NRC's Public Document Room.

Should you have any cuestions concerning this letter, please contact us.

Sincerely,

,kM $.(g tsiV e

% Kenneth P. Barr, Chfef Nuclear Materials Safety and Safeguards Branch Division of Raciation Safety and Safeguards

Enclosure:

Inspection Report No. 70-1113/86-07 cc w/ enc 1:

T. Preston Winslow, Manager Licensing and Nuclear Materials Management i

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