ML19339A316

Forwards Responses to Chemical Engineering Branch Questions 200.1 - 200.6 Per 800723 Request.Matls Will Be Formally Documented in Next Amend to FSAR

ML19339A316
Person / Time
Site:	LaSalle
Issue date:	10/27/1980
From:	Delgeorge L COMMONWEALTH EDISON CO.
To:	Youngblood B Office of Nuclear Reactor Regulation
References
NUDOCS 8011030572
Download: ML19339A316 (7)

Text

.

O one First National Plaza. Chicago, liknois Commonwealth Edison Address Reply to: Post Office Box 767 Chicago, lilinois 60690 October 27, 1980 Mr. B. J. Youngblood, Chief Licensing Branch No. 1 Division of Licensing U.S. Nuclear Regulatory Commission Washington, DC 20555

Subject:

LaSalle County Station Units 1 and 2 Response to NRC Request for Information (Questions 200.1 through 200.6)

NRC Occket Nos. 50-373/374 Reference (a):

R. L.

Tedesco letter to 0. L.

Peoples dated July 23, 1980 D e a r,. M r. Youngulood:

Attached for your review are responses to Chemical Engineering Branen Questions 200.1 through 200.6 transmitted oy Reference (a).

These materials will be formally documented in the next amenoment to tne LaSalle County F SAR.

Ten (10) copies of the subject responses are submitted to facilitate your review.

If you have any questions in tnis regard, please direct them to this of fice.

Very truly yours,

/

/

/

-u /7 -

L.

O. DelGeorge Nuclear Licensing Administrator Attachment cc:

RIII Resident Inspector - LSCS 7703A

\\

k$ Os\\

801,os0597 g

=

t 4

)

).

200.1.

Your FSAR does not indicate that chemical analysis for suspended impurities is perforned in accordance with position C.1 of Regulatory Guide 1.66.

Verify that such analyses are perf er=ed.

State the sa=pling and analysis frequency and established li=its for suspended solids and

'the basis for such li=its.

RESPONSE

As a part' of the proposed fuel warranty chemistry progras, reacter feedwater filterable solids will be done en a weekly basis.

This analysis.will define the filterable solids, concentratica in the combined condensate desineralizer effluent and heater drain tank discharge. The preposed 11=1e f or filtarable solids is 15 ppb. The limit has been determined to provide ' a suitable envi :n=ent for the fuel as far.as suspended solids are concerned.

I 4

r 1

J h

I f

I l

.v, y

,.,a...

-.i

~

- ~.,..

e--

O mm o

-Q' wc c

.i

3 200.2.

Describe the sequential resin regeneration frequency or replacenent frequency that will be established in order to naintain adequate capacity nargin in the condensate treatnent systa= (Regulatory Position C.2 of Regulatory Guide 1.56, revision 1). Include the b isis for the resin regeneration or replacenent frequency.

RESPONSE

The resin regeneration frequency and the basis for resin regeneration are addressed in FSAR 10.4.6.2 and FSAR Appendi:c 3, an=endnent 30, March 1978.

i i

l J

i l

t i

I

)

4 I

2 l

.l

-200.3 Verify that the initial total capacity of new deminerali:er resins vf.11 he measured (Ragulatory Position C.3 of Regulatory Guide 1.56, revision 1).

Describe the method to be used for this =easurement.

t RESPO::SE:

The resin vendor provides a certificate of conformance to uccmonwealth Edison nuclear grade resin specificatiens as part of the purchase agreement. LaSalle Station also sends sa=ples of new resin to their OAD Labs for capacity measure =ents before using the resin. Capacity measurements are =ade in accordance with ASDI D2187-74.

i i

i l

r i

i i

I i

I l

e

-n+,

y.,vn

,4e e

p w r,e e

-en--

2 D"*D "D

T oc w

s 200.4 Describe the method that (a) the conductivity meter readings for the condensate polishing system will be calibrated; (b) the flow rates through the decineralizers of the reactor water cleaning system will be censured: (c) the quantity of the principal ions likely to cause decinerali:ar breakthrough will be calculated; and (d) the accuracy of the calibration of resia capacity will be checked (Regulatory Position C.4 of Regulatory Guide 1.56, revision 1).

RES?CNSE:

a.

The conductivity =eter readings for the condensate polishing system will be ccmpared to flow cell conductivity readings which have been sessured against a vendor supplied standardi:ed conductivity cell.

1 b.

Flows t.hrough the reactor water cleanup decineralizer are measured withofficeplatesandficw transsitters. Individual decineraliser flow and systen flow is seasured.

c.

Resia breakthrough is first noted by the presence of silica in the effluent. The practice of regenerat1ng resins based on silica breakthrcugh or the exceeding of the setpoints, set in accordance with Table 2 of Regulatory Guide 1.56 (Revision 1), has shown to be an effective progran for =aintaining water quality and combating cooling water inleakage. LaSalle Station intends 1

to follow this program in the operation of the condensate polisher system.

I d.

The utili:ation of the criteria in Section 4.c. is sufficient for maintaining resin capacity, thus the verification of resin capacity by actual sa=pling is unneessary. Such sampling would involve radiation exposure to the persen doing the sampling, and in keeping with our ALARA policy, such e:gosure cannot be j

j us tified.

i 4

e p

r

1 I

3 i

Specify the procedures for. determining the pH, chloride concentraticas, 200.5.

and conductivity in the reactor vessel water (Regulatory Position C.6 of Regulatory Guide 1.56, revision 1).

RESPONSE

The measurement for pH is made using individual =easuring/ reference electrodes or a combination' electrode. Chloride concentration measurements are =ade using a chloride specific ion electrode or 4

j by the nephelocetric (turbidity) method. Conductivity is ceasured using an in-line flow-cell which continuously monitors.the conductivity.

i t

I 4

I i

l 1

,4 i

i i

i i

I~

(

t

i 200.6

'Section 10.4.6 of the FSAR describes only qualitotively the i

measurement of conductivity of the condensate decinerali:er influent and effluent.- Describe your water chemistry control program to assure =aintaining condensate conductivity within j

the limits of Table 2 of Regulatory Guide 11.56, revision 1.

Include conductivity =eter alarm set points and the corrective i

actions to be taken if the limits of Table 2 are exceeded.

I i

RES?ONSE:

t The condensate decinerali:er systen has in line conductivity

.seters which continuously =enitor the inlet and outlet conductivities. The conductivity meter readings.are re'itewed on a regular basis. Calibracion checks on the conductivity meters wil] be perfor:ed on a regular basis in accordance with Station Procedures. Cenductivity meter alars set points will be set in accordance with the guidelines provided in Table 2 of l

Regulatory Guide 1.36 (Revision 1).

Exceeding any of these' set points will nor: ally require resin cleaning and/or resin regeneration.

4 I

i 4

i l

i

)

i I

i 1

t I

k j

J I

I a

1

. - -. -. -. -.