ML19326B651

Forwards Followup Rept AO 50-313/74-11C.Promised at 751010 Meeting W/Region IV in Little Rock,Ar

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: ML19326B651 ML19326B658 ML19326B662 ML19326B664 ML19326B670 ML19326B676 ML19326B683 ML19326B687 ML19326B691 ML19326B694
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

4 l 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. '

i

ie would.' appreciate any comme .ts or questions on the attached at your car-liest conrenience. ~

<7 pry truly yourss e

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(s Nilliam Cawd.augh III /

Manager, Nuclear Senfgs[

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. Mr. B. C. Rus cV~' October 31, 1975 j cc: Mr. E. Morris Howard l Office of Inspection S Enforcement (

Region IV U. S. Nucicar Regulatory 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012 i I

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. DETEICilNATION OF OII.0 RIDE IN 'IIIE PRESENCE CF SODIth! TrlI0 SULFATE i

(Titration Method) -

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i 1.0 SCOPS.

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This procedure covers the detemination of chloride in.the presence'of 4

4 sodium thiosul u:Le as used in ' the reactor building spray sys cra. #

i 1.

,. 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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i 3.0 DEFINITIONS t i

i '3.1 Reagent Blank " Reagent water sarple carrie:. thrcugh the test procedure.

j g 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.

j. 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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j. - 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. l l i 6.2 Silver Nitrate - Dissolve 2.4 grams Silver Nitrate in distilled }

' 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%) [

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. l i

j L. 7.0 APPARATUS - ,

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_ 7.1 Beaker, 250 al '-!

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j 7.2 . Graduated cylinder, 100 ml

- 7.3 Pipet.-1 al volumetric b

1-7.4 Pipet, 1 a1:*chr

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• - S.0..STANDA@IZATION:

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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. , j i -- .

9.0' PRCCEDURE 9.1; Add 20 ml of 30% H.30., to 100 ml of sample.

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" 9.2 Sail the sarale until' the reaction stops.

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(Reaction consists of a  !

'2arge volume of 'cubbles ) . .

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Abnorr'al Occurrence !!cport ?!o. 50-313/74-11C i

10. Corrective Action: I l

See Attached inspection and examination program for schedulo 10 stainless  ;

steci piping associated with material heat numbers 800201 and 2P 3352. l l

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11. F~ilurc Data: -

l l See A0R No. 50-313/74-11 .

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!.L: rch ;, 1973 NSP-10, .;ev. 2 Page 4 or .1

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