ML19224A841
| ML19224A841 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/19/1979 |
| From: | Telford J, Telford T Office of Nuclear Reactor Regulation |
| To: | Stello V Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7906060191 | |
| Download: ML19224A841 (5) | |
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UNITEo STATES J..
M NUCLEAR REGULATORY COMMIC310N Nt1d5 E WASHINGTON. o. C. 20535
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f L l MEMORANDUM FOR:
V.
Stello FROM-Tom Telford
SUBJECT:
50RON MEASUREMENTS FROM 4/11/79 PRIMARY SYSTEM SAMPLE (NON-PRE S SU R I Z ED)
The crimary sample taken on 4/11/79 was split and send to Settis, B&W, ORNL and SRL for analysis.
Th i s no t e is to document the Soron 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 I provides a summary of analysis results.
B&W has considerable experience and is quite ennfident in their analy.is techniques (Don Nitti and Jack Hicks, 804-384-5111).
iefore initiating de-borat.on by the additional demineralized water to tne MU tank, the Technical Review Group (Arnol c, et c. ) reques t ed verification by an independent source, i.e.
National Lab.
Of the th ee Labs, ORNL has the more complete and accurate verification.
See the Attachment to. Figure 1 for discussion of each labs analysis.
Eased on the ORNL analysis a decision was reached on Friday, Acril 13, 1979 to begin clean water addition.
At the
~ e of the evening planning mee(ing 1800, the calculated PPM Boron was 2973.
This a;sumes the starting point was 3000.
NRR opera-tions will monitor the Baron concentration based on Meted cal-culation and compare these calculations with orinarv sample 790606019[
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analyses as they come in.
Figure 2 is a plot o# t,ese calculations and an indication of analysis results.
It appears that the makeuo wi th denineralized water will maintain the boron concentration ather than decrease it since the leakage from the plant i s likely to be steam.
Tom Telford cc:
R.
Vollmer D.
Davis J.
Collins File: Baron Concentration 5
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N 227 24
FIGURE l Baron Concentration Comparison Primary Coolant Sample Taken 4/11/79 SOURCE OF ANALYSIS Bettis B&W ORNL SRL Eample, Ph 7.65 8.5 8.0 7.7 Boron, PPM 2400 ppm 1100 3409 1 15
- 1. 3580 2200*
- 1. 2600 f 200*
2.
3220 150
- 2. 3100 1 200 Technique Colometric Methanol Mass Carbon Rod Spectrometer Atomic Absorption investigator Bogar Hicks Schultz Gibbs &
Contact Nitti Overman Phane 412-462-5000 804-384-5111 615-574-4830 803-279-2714 x6527
- 0RNL Reported 2 values by sepa rate methods (see attached)
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+*St rong funct ion of sanple turbidity, second value obtained after shaking sample r
227 24:'?
Notes of Boron Resul ts Bettis - (B'oga r)
Colorimetric method used, fi rst 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 oct ready for analysis.
BLV- (Ni t t i )
1.
On Boric Acid Solns @ 32 F 4500 ppm max 135 F 120,000 ppm max 2.
18' of caustic (NADH) added to primary during HPCI inj ection -
accounts'.for approximately 1000 ' ppm Na measured in sample.
ORNL r"*
7 Schult:
home numbe r%,.....
==Jcook great ca re in cleaning sample bottle used three methods 'in view of NRC concern over the accuracy of Soron Mass Spec. most accurate.
They also used emission spectrometry as a ballpark check and microtitration to check resul ts f rom Mass Spec.
GRNL very confident in results.
Based on. di sc. with Schults on cor relation of B&'d and ORNL results NRC concluded that Boron above 3400 ppm es of 4/13/79.
SRL f.:
_ Giagnaine dilution re-Overman and Ann Gibbs t' quired for carbon rod atomic abosrption method (ended up with 20 ul sample) concern with turbidity of soln., secondary analy-sis increased concentration f rom 2600 to 3100 af ter shaking vile.
Gibbs concerned with B leaching on particl'es in sample.
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