L-77-111, 04/08/1977 Response to Request for Additional Information Steam Generator Operating History

04/08/1977 Response to Request for Additional Information Steam Generator Operating History

ML18127B086
Person / Time
Site:	Saint Lucie
Issue date:	04/08/1977
From:	Robert E. Uhrig Florida Power & Light Co
To:	Ziemann D Office of Nuclear Reactor Regulation
References
L-77-111
Download: ML18127B086 (8)

Text

NRC FORM 1SG U.S. NUCLEAR REGULATORY COM "SSION OOC T NUMBFR I2.16)

FILE @UMBER

'FJRC DISTRIBUTION FoR PART 50 DOCKET MATERIAL FROM: DATE OF DOCUMENT Florida Power & Light Company 4/8/77 Mr. Dennis L. Ziemann Miami; Florida DATE RECEIVED Robert E. Uhri 4/11/77

~ BETTE R NOTORIZEO PROP INPUT FORM NUMSER OF COPIES RECEIVED RIG INAL N C I.ASS IF I E D QCOP Y DESCRIPTION ENCLOSURE r

Ltr. trans the following:

5 s Consists. of information concerning the Unit No. 1 steam generator operating history s ~ ~ ~ ~ ~ ~ ~ ~

(1-P) (2-P)

PLANT NAME:

St. Lucie Unit No. 1 RJL SAFETY FOR ACTION/INFORMATION ASSIGNED AD:

P 0 C~MA E PROJECT MANAGER L C ASST LIC ASST INTERNAL D I ST R I BUT ION SYSTEMS SAFETY PLANT SYSTEMS S SAFE NRC PDR HEINEMAN TEDES 0

'I-&-E 'SCHROEDER 0 OELD GOSSECK & STAFF ENGINEERING EPPOLETO E 0 MEPC MACARRY ERNST CASE BOSNA BALLARD HANAUER SIHWhEL OPERATING REACTORS YOUNGBLOOD HARLESS PAWL CK STELLO SITE TECH PROJECT MANAGEMENT REACTOR SAFE OPERATING TECH GAMMILL BOYD ROSS EISENHUT STEPP P COLLINS NOVAK HULMAN HOUSTON ROSZTOCZY PETERSON CHECK B E SITE ANALYSIS MELTZ VOLLMER HELTEMES AT&I BUNCH SKOVHOLT SALTZMAN J, COLLENS RUTBERG KREGER EXTERNAL DISTRIBUTION CONTROL NUMBER PDR0 NAT LAB TIC: REG V IE ULR KSON OR NSIC.

ASLB:

LA PDR CONSULTANTS:

p/O gd'O~i ACRS CYS HQ&BXÃG/ E NRC FORM 196 {2.16)

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P. O. BOX 013100, MIAMI, FL 33101

~y9 le FLORIDA POWER & LIGHT COMPANY c

L-77-111 li APR11 Igjjg O) s~~ ~TO V~/ ~~~o J

Office of Nuclear Reactor Regulation Attn: Dennis L. Ziemann, Chief Operating Reactors Branch No. 2 Division of Operating Reactors U. S. Nuclear Regulatory Commission Washington, D. C. 20555

Dear Mr. Ziemann:

Ate 6y.

p~'I ~nfl Re: St. Lucie Unit No. 1 Docket No. 50-335 Steam Gen'erat'or Op'era't'in Histor In response to a request from Mr. R. D. Silver of your office, attached is information concerning the St. Lucie Unit No. 1 steam generator. operating <<history.

Yours very i

truly, obert E. Uhrig Vice President REU/LLL/hlc Attachment cc: Robert Lowenstein, Esq.

PEOPLE... SERVING PEOPLE

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Attachment to L 1 UTILITY: FLORIDA POWER 5 LIGHT COMPANY PLANT NAME'- ST- LUCIE UNIT NO. 1 DOCKET NO.: 50-335 a ~ Significant operating history

1. 0. L. date - 3/1/76

2. Full power operation - 2/19/77

3. Major. period(s) of downtime (non-refueling) - 7/10/76 to l2/10/76 Outage to replace burnable poison pins in fuel assemb'lies

b. Materials of construction for major secondary system components

1. S. G. tubes - Inconel 600

2. S. G. tube sheet - Carbon steel (Inconel clad on primary side)

3. S. G. tube support plates - Carbon steel

4. Condenser tubes - Alum-Brass (90-10 Cu-Ni used in air removal section )

5. Other - Feedwater heater tubes: Admiralty (6 heaters);

90-10 Cu-Ni (2 heaters);. Monel (2 heaters). All have steel shell.

C. Operational history of secondary water treatment I. Period of use of phosphates - None

2. Period of use of AVT - All

3. Period of use of condensate demineralization - None

4. Other - Hydrazine for oxygen control and atmonia for pH control Condenser cooling water - typical chemical composition Cooling water is straight seawater (Atlantic Ocean) .

19,800 ppm chlorides and 6.65 ppm Dissolved Oxygen See attached chemical analysis

e. History of significant condenser tube leakage

1. Date discovered - About 4 events between l2/76 and 3/77

2. How discovered - Condenser and steam generator conductivity

3. Leakage associated - Approximately 10 condenser tubes have been plugged -.

Denting history

1. Date discovered - None

2. How discovered - None

3. Leakage associated (gpm) - None

g. Steam Generator Tube plugging history

1. Dates - None

2. Number of tubes - None

h. Operating restrictions imposed on the plant due to degraded S.G. conditions.

None

H q ~

ATTACHMENT

d. (Continued)

Condenser cooling water - typical chemical composition

~m~l Arsenic.... < 0.001 Cadmium.... < 0.02

'hromium... < 0.02 Coppero ~ ~ ~ ~ < 0.02 Trono ~ ~ ~ ~ ~ ~ 0.08 Lead....... < 0.05 Mercury.... < 0.0002 Nickel..... < 0.02 Zinc.. ~...

~ 0.05

~ 'C

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