ML20203K863

Rev 0 to Training Lesson Plan LO-LP-36107-00-C, Gas Generation

ML20203K863
Person / Time
Site:	Vogtle
Issue date:	05/06/1985
From:	Brigdon R, Scukanec D GEORGIA POWER CO.
To:
Shared Package
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References
LO-LP-36107-, LO-LP-36107-00, NUDOCS 8608210386
Download: ML20203K863 (8)

Text

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VOGTLE ELECTRIC GEN 6 '- p , g V'3 p.o TRAINING LESSON PLAN GAS GUERATION TITLE:

NUMBER:

5173 % w_o PROGRAM-ucease oet m w ." L. REVISION- #o AUTHOR: RICHARD D. BRIGDON DATE: l'535 APPROVED:

MM DATE: g-////f

REFERENCES:

t. NUREG 0737. ITEN II.B.4

2. . MCD TRAINING, VEGP FSAR, CHAPTER 13; ITEM 13.2.1.1.6

'5 , MITIGATING CORE DAMAGE, " GAS GENERATION," GENERAL PHYSICS CORPORATION INSTRUCTOR GUIDELINES:

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HANDOUT: " GAS GENERATION,"-et-Elb 086 W a.cosE % =s(34teer' **** LLST 0+ 8 L.e -TP- 3Wo7-00 -C. S&-5F-486-4 col FRESSURE VS. CONCENTRATION FOR 2H IGNITION IN

'., PRESSURE VESSEL TP=089=2'odi TMI-2 REACTOR BUILDING PRESSURE SPIKE SE-TP-066=S M EFFECTS OF H IGNITION ON TMI-2 S/G PRESSURE S&-WP-066-4cor CALCULATED V 0F HyBUBBLE IN TMI-2 HEAD VS.

r TIME 45-486-604 E MATultTAL 2 BALANCE SUMNARY 1

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1. PURPOSE STATEMENT:

THIS LESSON WILL PROVIDE THE STUDENT WITH AN UNDERSTANDING OF HOW HYDROGEN CAN BE PRODUCED INSIDE CONTAINMENT DURING AN ACCIDENT, THE HAZARDS ASSOCIATED WITH HIGH HYDROGEN CONCENTRATIONS, AND THE MEANS AVAILABLE FOR DISPOSAL OF HYDROGEN AND OTHER NON-CONDENSIBLE GASSES.

II. LIST OF OBJECTIVES:

Ta runi n al Obiactive

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1. List the sources of Hydrogen and Oxygen within the primary systems and containment.

2. State the hasardous concentration ranges of explosive and flasmable mixtures of "

Hydrogen and Oxygen. ~

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3 Describe the means available to measure the containment hydrogen concentration and to control it. ,

4. Explain the techniques for venting-and disposing of non-condensible gasses.

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Le -LP- NO-cc-c e Ill. LESSON OUTLINE: NOTES I. INTRODUCTION A. Topic of most concern at TMI was H bubble formed in W-TE~ h

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the reactor vessel. cG3thcm L5

1. Fears of explosion were unfounded due to lack of 0 in RCS.

2

2. H2 Prevents accumulation of 02*

B. Amount of H, produced was sufficient to cause legitimate -02 "2 000 i concerns ab5ut core cooling and flammability in the T9- oo T containment atmosphere.

1. An ignition occurred about 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> into accident. 9R=TF=089=2-2.

TP-cos Equipment may have been damaged but no harm to CTB.

II. SOURCES OF HYDROGEN A. Radiolysis of Water gpyc g g

1. 2H2 O p 2H2+02 '

n 2. Yield dependent upon:

• 14.- a. Energy absorbed Boiling increases radiolysis by 30 times I

b. Nature of radiation

1) Co-60 gamma .45 molecules /100 av of emergy absorsed

2) 4 1.1 molecules /100 ev absorbed

c. Temperature - radiolysis stopped by adding H 2

C.~ to residence ties l 3. 74 "

1 ppe; therefore radiolysis not

b. H 2

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( B. Zirconium-Water Reaction l

l 1. Above 1600'F Zire alloys react with water to form H2 + Zr02

a. f Zr + 2H20 -> Zr02 + 2H2 p 3

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lli. LESSON OUTLINE: NOTES

b. Reaction rate increases with temp. and very rapid above 2700*F (self-sustaining at approx.

2300*F)

2. Reaction could result in chemical-induced explosion. ,

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3. Violence of the reaction dependent upon: '

a. Rate of cladding melt

b. Size of melted particles

c. Ratio of amount of cladding to amount of water.

4. Result of large LOCA

a. Start and self sustain at 2200*F

b. Accelerate rapidly to 3000*F 1)' Clad melt occurs -

2) Stops if heat source removed when in " -

.a contact with liquid water. -

c. E, produced in proportion to amount of cladding material that has reached.

1) 8 scf per Ib. of Zr oxidized

2) 1.e., large amount of H, indicates large amount of clad failure

d. E, leaves reactor vessel through break and rises to CTMt done.

1) Prevents 0, absorption in cloud due to t

conceEtration.

2 while rising C. Al@f  ?-

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l 2. NaOH provided by containment spray system actuation during LOCA Aluminum - components inside containment

3. Corrected / minimized by minimizing aluminum components in containment.

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=- u_a 111. LESSON OUTLINE: NOTES III. HYDROGEN COMBUSTION A. Limits of Combustion (.d e T c G IE c-n u t * ~7_

1. Flammable at 4 percent

2. Lower limit for detonation is 19 percent B. Pressure Increase from H2Combustion

1. Combustion of 4 to 9 percent concentrations produce pressure excursions dependent upon:

a. Pre-combustion mixture temp.

b.

H2 " ""*""**"i "

c. Yessel material, size, shape 4R-TP=08t=1

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d. Ignition mechanism

2. Between'8-10% - slow flame propagation (pressure ~

rises 8 times initial) ' ~

.- 3. Greater than 14-19 percent - detonation (pressure <

rise 17 times initial) F IV. H2FRENOMENA AT THI-2 A. 28 psig pressure pulse on 3/28/79 -Sa-D-086-2 TP-oo3

1. Reactor building temp. = 40'F

2. No'similar imlientions at any other time.

3. Figure 3 shows pulse as sa apparent decrease in 85 4 9-046-&

steam pressure. 'T1"- 0 0 9

4. Figure 1 ure rise of 28 poi from 4R-fP-606=1-TP-oo 2.

B. E 1/85 2

1. .7%

• Air normally 15.7% contains 21% 0 82.6% 2

2. Sample 2 - H = 1.7Z

• 0 2 = 16.5%

N2 = 81.8%

3. Higher concentrations on 4/1/79 indicate earlier H burn.

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sa-u-ou lli. LESSON OUTLINE: NOTES V. CONTADGENT CAPABILITY A. Pk pressure of 28 peig.

B. CTMT design pressure - 60 psig Therefore, no threat to integrity of oxidation of 29%

of Zr.

C. Possibility of H buildup very low due to the numerous ignition sources.2 (Motors, valve operators, etc.)

D. If 100% of Zr had reacted containment would have ** '"'-005 5 remained intact.

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CNME failure 150 to 190 psia due to tendon failure.

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TRAINING MATERIAL ROUTING ,, g, TRAINING MATERIAL NUMBER EW MATER REVI'EDS MATERIAL

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' y REASON FOR REVISION: )

MAJOR REVISION DUE TO ERRORS OR OMISSIONS.

REVISION DUE TO CHANGES IN EQUIPMENT. j g REVISION DUE TO CHANGES IN PROCEDURES /0PERATING INSTRUCTIONS OR POLICT. I DESIRE ADDITIONAL GRAPHICS / HANDOUTS FOR THIS TRAINING MATERIAL OTHER COMMITTMENTS: TES M NO DRAFING REQUEST FILLED OUT. TES NO W DATE SUBMITTED FOR SUPERVISOR'S REVIEW '7/17-REVIEW SAT UNSAT APPROVAL SIGNA DATE W f/ M

• • • • • DATE NEEDE FOR FROM TYF UG *****

LIBRART CLERE: b ~

DATE TO TTFING

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I DATE TO DRAFTING I/M .

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DATE FROM TTFDG DATE FRON DRAFTING 8/# 5 CONFILID MATERTA12 TO INSTRUCTOR FOR RIV,I N. DATE INSTEDCTOR 3371W: TTFING SAT UNSAT DRAFTING SAT UNSAT REWORE lETT

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REWORE: WRTT ,

i DATE NEEDED BY

'SUPERVISOE SIGNATURE DATE LIBRARIAN RECEIFT FOR INCLUSION /0UTDATING OF FILES. DATE TILE WORE DONE DATE

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