ML19221A591
| ML19221A591 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/19/1979 |
| From: | Telford J Office of Nuclear Reactor Regulation |
| To: | Stello V Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7905230265 | |
| Download: ML19221A591 (5) | |
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1r UNITEo STATLS g y3 ,f ' t NUCLEAR REGULATORY COMMISSION j [., s I WASHINGTON. o. C. 20S5s
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g \\ '.o */ /f MEMORANDUM FOR: V. Stello FROM: Tc.n Te l fo r d
SUBJECT:
BORON MEASUREMENTS FROM 4/11/79 PRIMARY SYSTEM SAMPLE (NON-PRESSURIZED) The primary sample taken on 4/11/79 was split and send r.o Bettis, B&W, ORNL and SRL for analysis. ~ Th is note is to document the Baron analysis results obtained from each organization. No instructions or recommendations on the type of analysis techni-que desired accompanied these samples. As a result, four different sample analysis techniques were used. Figure 1 provides a summary of analysis results. B&W has considerable experience and is quite confident in their analysis techniques (Don Nitti and Jack Hicks, 8?t-384-5111). Before initiating de-boration by the additional demineralized water to the MU tank, the Technical Review Group (A r no l d, etc.) requested verification by an independent source, i.e. National Lab. Of the three Labs, ORNL has the more complete and accurate verification. See the Attachment to Figure 1 for discussion of each labs analysis. Based on the ORNL analysis a decision was reached on Friday, April 13, 1979 to begin clean water addition. At the time of the evening planning meeting 1800, the calculated PPM Boron was 2973 This assumes the starting point was 3000. NRR opera-tions will monitor the Boron concentration based on Meted cal-culation and compare these calculations with primary sample 79052302Gf \\65 \\75
V. Stello
- s analyses as they come in.
Figure 2 is a plot of these calculations and an indication of analysis results. It appears that the makeup with demineralizea water will maintain the boron concentration rather than decrease it since the leakage from the plant is likely to be steam. Tom Tel fo rd cc: R. Vollmer D. Davis J. Collins File: Boron Concentration 165 176
6 FIGURE 1 Boron Concentration Comparison Primary Coolant Sample Taken 4/11/79 SOURCE OF ANALYSIS Bettis B&W O RNL SRL Sample, Ph 7.65 8.5 8.0 7.7 Boron, PPM 2400 ppm 1100 3409 1 15
- 1. 3580 1200*
- 1. '!600 1 200*
- 2. 3220 50
- 2. 3100 1 200 Technique Colometric Methanol Mass Carbon Rod Spectrometer Atomic Absorption investigator Bogar Hicks Schultz Gibbs &
Contact Nitti Overman Phone 412-462-5000 804-384-5 11 615-574-4880 803-279-2714 x6527
- ORNL Reported 2 values by separate methods (see attached)
- Strong function of sample turbidity, second value obtained af ter shaking sample 165 177
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FIGURE i, Attachment j 'A ~ ~ Notes of Boron Results 8ettis - (Bogar) Colorimetric method used, first step was to dilute sample by 500. NRC discounted this technique. Bogar explained that Bettis was unable to recheck analysis using mass spec (isotopic dilution)', would take 5 days to get ready for analysis. B&W- (N i t t i ) 1. On Boric Acid Solns @ 32 F 4500 ppm max 135 F 120,000 ppm max 2. 18' of caustic (NA0H) added to primary during HPCI injection - accounts for approximately 1000 ppm Na measured in sample. ORNL Schult: home number (615) 483-8329 took great care in cleaning sample bottle used three methods in view of NRC concern over the accuracy of Boron Mass Spec. most acctrate. They also used emission spectrometry as a ballpark check and microtitration to check results from Mass Spec. ORNL very confident in results. Based on disc. with Schults on correlation of B&W and ORNL results NRC concluded that Baron above 3400 ppm as of 4/13/79 SRL Overman and Ann Gibbs (803-279-2714). Giagnainc dilution re-quired for carbon rod atomic abosrption method (ended up with 20 ul sample) concern with turbidity of soln., secondary analy-sis increased concentration from 2600 to 3100 after shaking vile. Gibbs concerned with B leaching on particle in sample. 165 179}}