ML20080P469

Change 0 to Procedure CP/O/B/8150/05, Chemistry Procedure for Determination of Hydrazine,Auto-Analyzer

ML20080P469
Person / Time
Site:	Catawba
Issue date:	11/18/1982
From:	Evans L, Painter R, Tuckman M DUKE POWER CO.
To:
Shared Package
ML20080P419	List: ML20080P417 ML20080P421 ML20080P430 ML20080P443 ML20080P446 ML20080P449 ML20080P452 ML20080P460 ML20080P466 ML20080P469 ML20080P485 ML20080P488 ML20080P498 ML20080P505 ML20080P518 ML20080P526 ML20080P531 ML20080P535 ML20080P547 ML20080P549 ML20080P554 ML20080P561 ML20080P569 ML20080P575 ML20080P578 ML20080P586 ML20080P590 ML20080P598 ML20080P602 ML20080P605
References
CP-O-B-8150-05, CP-O-B-8150-5, NUDOCS 8402220555
Download: ML20080P469 (6)

Text

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Form 34731 (1041)

IFormsrly SPD 10021)

DUKE POWER COMPANY (1) ID No: CP/0/B/8150/05 PROCEDURE PREPARATION Change (s) O to PROCESS RECORD 0 Incorporated (2) STATION: Catawba (3) PROCEDURE TITLE: Chemistry Procedure for the Determination of Hydrazine, Auto-Analyzer (4) PREPARED BY: k2. DATE: //- /f- J'2-(5) REVIEWED BY: O be DATE:_ //- / t - f 2-Cross-Disciplinary Review By: h [jb1 (6) TEMPORARY APPROVAL (IF NECESSARY):

By: (SRO) Date:

By: Date:

(7) APPROVED BY: .b. Date: I\ l2 b -

(8) MISCELLANEOUS:

Reviewed / Approved By: Date:

Reviewed / Approved By: Date:

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Form 34634 (4-81) SPD 10012 DUKE POWER COMPANY NUCLEAR SAFETY EVALUATION CHECK LIST i l (1) STATION: Catawba UNIT: 1 X 2 X 3 OTHER:

(2) CHECK LIST APPLICABLE TO: GP/0/B/8150/05 (3) SAFETY EVALUATION - PART A The item to which this evaluation is applicable represents:

Yes No 2 A change to the station or procedures as described in the FSA or a test or experiment not described in the FSAR?

, If the answer to the above is "Yes", attach a detailed description of the item beleg evaluated and an identification of the affected section(s) of the FSAR.

! (4) SAFETY EVALUATION - PART B

, Yes No 2 Will this item require a change to the station Technical Specifications?

1 If the answer to the above is "Yes," identify 'the specification (s) affected

} and/or attach the applicable pages(s) with the change (s) indicated.

(5) SAFETY EVALUATION - PART C -

As a result of the item to which this evaluation is applicable: ,

Yes No / Will the probability of an accident previously evaluated in the FSAR be increased?

Yes No [ Will the consequences of an accident previously evaluated l

in the FSAR be increased?

Yes No [ May the possibility of an accident which is different j than any already evaluated in the FSAR be created?

Yes No Will the probability of a malfunction of equipment important to safety previously evaluated in the FSAR be increased?

l Yes No Will the consequences'of a malfunction of equipment important to safety previously evaluated in the FSAR be increased?

Yes No / May the possibility of malfunction of equipment important to safety different than any already evaluated in the FSAR be created?

l Yes No Will the margin of safety as defined in the bases to any I l Technical Specification be reduced?

I If the answer to any of the preceding is "Yes", an unreviewed safety -

[ question is involved. Justify tha conclusion that an unreviewed safety ,

l question is or is not involved. Attach additional pages as necessary.

[

(6) PREPARED BY: ,_ DATE: //-/ f f 2.

f (7) REVIDJED BY: bom DATE: //-//-P2,

( (8) Page 1 of I I

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, Fonn 18855 (3-80)

DUKE POWER COMPANY ALARA EVALUATION CHECKLIST (1) Station Catawba Unit: 1 X 2 X 3 Other:

(2) Checklist Applicable to: CP/0/B/8150/03 (3) ALARA Evaluation Check those items below which were considered applicable during the preparation and review of this document.

Flushing and draining were used to minimize source - strength and con-tamination levels prior to performing an operation.

Permanent and/or movable shielding was specified for reduction of levels.

Use of permanent or temporary local exhaust ventilation systems was used for control of airborne contamination.

Operation was designed to be completed with the least practicable time spent in the radiation field.

Appropriate tools and equipment were specified for the operation to be performed.

The operation was designed considering the minimum number of people necessary for safe job completion.

Remote handling equipment and other special tools were specified to reduce external dose.

Contamination - control techniques were specified.

The operation was designed to be conducted in areas of as low an exposure as practicable.

Additional ALARA considerations were:

c' ALARA Principles were not considered since the procedure did not involve work in a radiation area.

(5) Prepared by: / / Date // / T P 2.

(6) Reviewed by: /b h Date // N - f 2-e .

CP/0/B/8150/05 DUKE POWER COMPANY CATAWBA NUCLEAR STATION CHEMISTRY PROCEDURE FOR THE DETERMINATION OF HYDRAZINE, AUTO-ANALYZER 1.0 DISCUSSION 1.1 Scope l This procedura describes the determination of hydrazine in feedwater using the continuous flow (Redox Electrode) analyzer.

12 Principle Hydrazine (N24H ) inhibits corrosion by minimizing the oxygen content of the water according to the following reaction:

N H, + 0 2H.,0 + N,.

2* 2 A hydrazine residual is maintained at all times and is monitored by a continuous flow hydrazine analyzer. The feedwater sample enters at the back of the analyzer, and is directed through a flow control

valve, a flow rate meter, and then to a galvanic call. The cell

' consists of a silver oxida cathode immersed in a solution of potassium hydroxide electrolyte, and a platinum anode wrapped aroi s.d a porous sleeve which is positioned around the silver oxide cathode.

Thus, the electrolyte solution is held between the cathode and anode of the call where it acts as a salt bridge. Hydrazine in the sample

[ is oxidized at the platinum wire anode, and the electrons released from the reaction reduce si?ver oxide to silver metal at the cathode.

l The electrical current produced by the electron flow in the cell is l amplified and a response is indicated on the analyzer panel and a  !

l- strip chart recorder.

l 1.3 Precision and Interferences The precision of this method is i 2*. Substances normally present in industrial waters do not interfere with this procedure; however,

• hydrazine concentrations will be diminished by oxidising agents l

introduced at the sampling point or upstream of the analyzer.

1.4 Limits and Precautions The upper limit for this procedure is 250 ppb hydrazine, the lower limit is ~ l ppb hydrazine.

When preparing potassium hydroxide or hydrazine solutions, a labcoat, gloves, and eye protection shall be worn.

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, Pcgs 2 of 3 2.0 APPARATUS 2.1 Delphi, Model E Hydrazine Analyzer 4

2.2 1000 31 graduated cylinder 2.3 One liter poly bottle 2.4 1000 m1 glass beaker 2.5 Recorder 3.0 REAGENTS 3.1 Potassium Hydroxide (2.5% by wt.)

Dissolve 20 t 0.1 gas of potassium hydroxide in 780 i 10 ml of domin-eralized water. Cool and store in a poly bottle.

4.0 PROCEDURE 4.1 Electrode Preparation (as required) 4.1.1 Close sample valves ICT71 (Unit I) or 2CT71 (Unit 2).

4.1.2 Close the electrolyte tube by using a pinch clamp.

4.1.3 Slide out the electrolyte reservoir and check the potassium hydroxide solutioh level. If necessary, fill the reservoir.

Return the reservoir to its normal position.

NOTE: This will provide the electrolyte requirements of the analyzer for approximately forty (40) days.

4.1.4 Open the pinch clamp on the electrolyte tube and allow electrolyte to fill the cell.

4.1.5 Loosen the cell cap (anode) and allow the air bubbles to escape from the anode liquid space. Tighten the cap and wipe the excess electrolyte from the top of tha cell.

4.1.6 Open samole valves ICT71 (Unit 1) and 2CT71 (Unit 2)'.

4.2 Instrumentation Calibration (Weekly) 4.2.1 Turn the range switch to the "0FF" position and adjust the mechanical zero of the analyzer meter by turning the screw on the meter face.

a.2.2 Turn the range switch to the lowest usable range.

4.2.3 Verify adequate amount of electrolyte solution in the instrument reservoir.

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4.2.4 Adjust tha ficw to 100 ml/nin.

4.2.5 Take sample at FINAL FEEDWATER SAMPLE ISOLATION VALVES 1CT25 and 2CT25 for the respective instrument, and run manual hydrazine as per CP/0/B/8100/17 (Chemistry Procedure for the Determination of Hydrazine).

4.2.6 Recheck sample flow for 100 ml/ min.

4.2.7 Adjust the meter to the actual hydrazine concentration

'ising the span potentiometer.

5.0 REFERENCES

5.1 Delphi Industries. Instructions for Model E Hydrazine Analyzer.

South El Monte, California. Delphi Industries.

5.2 Olin Chemical Product Data Sheet. CD-108-373, Olin Chemical Company. Stanford, Connecticut.

5.3 McGuire Nuclear Station Chemistry Procedure For the Determination of Hydrazine in Feedwater (CP/0/B/8100/13).

6.0 ENCLOSURES None I

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