ML19326B651
| ML19326B651 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 10/31/1975 |
| From: | Cavanaugh W ARKANSAS POWER & LIGHT CO. |
| To: | Rusche B Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19326B653 | List: |
| References | |
| NUDOCS 8004170501 | |
| Download: ML19326B651 (2) | |
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- A RK ANS AS POWE A G LIGHT COM PA N Y 97>= & (CusstAN A ST AEET3 e t.lTTLE ACCK. A A< ANS AG 722O3 e (5013 372 = 4:2 11 October 31, 1975 1
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Nr. B. C. Rusche Director of Nuclear. Reactor Regulation U. S. Nuclear Regulatory Commission i
Washington, D. C.
20555
Subject:
Arkansas Power G Light Company Arkansas Nuclear One-Unit 1 Docket No. 50-313 License No. DPR-51 4-Abnormal Occurrence Report No. 50-313/74-11C
Dear Mr. Rusche:
.ittached please find our follow-up report on schedule 10 stainless steel
_ pining a.; promised at the October 10, 1975 meeting in Littic Rock with N;.C Region IV per.sonnel.
I Tiw following are 1:teluded:
- 1) Chemical analysis procedure for chloride deternination in the presence of sodium thiosulfate at ANO.
2)' A0R # 50-313/74-11C which includes; a)
FAA fatigue analysis of schedule 10S piping.
~ b) - Follow-on examination and inspection prngram for schedule 10 stainless steel piping asso:it.ted with material heat numbers ' 800201 and 2P3332.
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- ie would.' appreciate any comme.ts or questions on the attached at your car-liest conrenience.
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<7 pry truly yours e
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Nilliam Cawd.augh III /
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Mr. B. C. Rus cV~' October 31, 1975 j
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Mr. E. Morris Howard l
Office of Inspection S Enforcement
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Region IV U. S. Nucicar Regulatory 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012 i
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. DETEICilNATION OF OII.0 RIDE IN 'IIIE PRESENCE CF SODIth! TrlI0 SULFATE i
(Titration Method) 1 6
i 1.0 SCOPS.
I This procedure covers the detemination of chloride in.the presence'of sodium thiosul u:Le as used in ' the reactor building spray sys cra.
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2.0 PRINCIPLE OF METHOD 1
E Tne,thicsulfate is oxidi:cd by hydrogen peroxide. The solutica is then j
' titrated with Silver Nitrate using Potassit:n Chrcmate as an indicator.
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3.0 DEFINITIONS t
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'3.1 Reagent Blank
" Reagent water sarple carrie:. thrcugh the test procedure.
3.2 Reagent Grade - Ccnfoming to ASTM specificatica E200.
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'3. 3 Reagent Nater - Coniorming to ASIM specification D1193.
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.4.0,IhTERFERENCES
-Bromide,-iodido end cyanido register as equivalent chloride concentrations.
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St:1 fide, thiosulfate, and sulfite ions interfere if not removed by pre-treatment.
i 5.0. REAGENTS 3
Unless othe: wise indicated, all reagents shall be of the quality knchn i
as " Reagent Grado".
5.11 Hydrogen Peroxide, 30% by weight 5.2,' Potassium Chromate
' 5.3 Sedit=1 Taicsulfate :
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5.4 fSodite
Hydroxide 5.5: Nitric Acid (70%)-
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5'.6'. Silver; Nitrate..
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_ U 5.7 Chloride Standard Solution 1000 pp.\\1 - Hach Cat. #183 p
5.8 pH indicator-paper t
6.0 SOLIEIGNS t
6.1 Potassium Chromate indicator solutien - Dissolve 5 grams of l
potassium chromate -in distilled water and dilute to 100 ml.
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i 6.2 Silver Nitrate - Dissolve 2.4 grams Silver Nitrate in distilled
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' water and dilute to 1000 ml. This solution may also be purchased l
prepared as a 0.0141 N Solutien.
y 6.31 Nitric ' Acid (6M) - Add 400 ml of concentrated Nitric Acid (70%)
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f to 500 mi of distilled water. Cool to roca temperature and dilute j-to 1' liter with distilled. water.
l 6.4-Sodium Hydrcxide (N/5) - Dissolve 8 grams Sodium Hydroxide in dis-tilled water. Cool to rocm temperature and dilute to 1 liter with t
distilled water.
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7.0 APPARATUS y
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7.1 Beaker, 250 al j
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. Graduated cylinder, 100 ml
- 7.3 Pipet.-1 al volumetric b
7.4 Pipet, 1 a1:*chr 1-
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S.0..STANDA@IZATION:
t f-3.1. Dilute 1 ml of the 1000 ppm chloride standard to 100 ml with distilled water (10 ppm Chloride Solution).
3.2. Dissolve 5' grams of. Sodium 'Iniosulfate in 100 ml of the 10 ppm Chloride solution.'
- 8.3 Take the aiove solution -thrcugh the precedure as a sample.
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9.0' PRCCEDURE i
9.1; Add 20 ml of 30% H.30., to 100 ml of sample.
9.2 Sail the sarale until' the reaction stops.
(Reaction consists of a s
'2arge volume of 'cubbles ).
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Abnorr'al Occurrence !!cport ?!o. 50-313/74-11C i
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Corrective Action:
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See Attached inspection and examination program for schedulo 10 stainless steci piping associated with material heat numbers 800201 and 2P 3352.
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F~ilurc Data:
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See A0R No. 50-313/74-11 l
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!.L: rch ;, 1973 NSP-10,.;ev. 2 Page 4 or.1
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