ML17138A545

Rept Translated from German: Results of Non-Nuclear Hot Test W/Relief Sys in Philippsburg Nuclear Power Plant

ML17138A545
Person / Time
Site:	Susquehanna
Issue date:	03/22/1977
From:	Gobel PENNSYLVANIA POWER & LIGHT CO.
To:
Shared Package
ML17138A531	List: ML17138A530 ML17138A532 ML17138A533 ML17138A534 ML17138A536 ML17138A537 ML17138A538 ML17138A539 ML17138A540 ML17138A541 ML17138A542 ML17138A544 ML17138A545 ML17138A546 ML17138A547 ML17138A548 ML17138A549 ML18031A117 ML19284A738 ML19284A739 ML19284A747
References
R142-38-77, NUDOCS 7903150371
Download: ML17138A545 (66)

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KERNKRAFT'rlERK PH I LI PPSBURG AUFLISTUNG DER VERSUCHSPAR ERGEBNISSe, DER IHICHTNUKLEA DRUCKENTLASTUNGSSYSTEIM A.u

> WCDR/R/:

HpFvi~AN NOTICE THE ATTACHED FILES ARE OFFICIAL RECORDS OF THE DIVISION OF DOCUMENT CONTROL.

THEY HAVE BEEN CHARGED TO YOU FOR A LIMITEDTIME PERIOD AND MUST BE RETURNED TO THE RECORDS FACILITY BRANCH 016.

PLEASE DO NOT SEND DOCUMENTS CHARGED OUT THROUGH THE MAIL. REMOVALOF ANY PAGE(S) FROM DOCUMENT FOR REPRODUCTION MUST BE REFERRED TO FILE PERSONNEL.

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": >i~'.VN PHILIPPSBUR6 I

NUCLEAR POHER PLAi)T LIST OF TEST PARAi'lETERS AND HOST li"lPORTAHT I"lEASURE)'lEi'IT RESULTS OF THE iIOiN-NUCLEAR HOT TESTS I'IITH THE PRESSURE RELIEF SYSTEH i

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PROPRIETARY INFORMATION This document has been made NON-PROPRIETARY by the deletion of that information which was classified as PROPRIETARY by KRAFTWERK UNION AG (KWU).

The PROPRIETARY information deletions are so noted throughout the report where indicated by a)

Use of the term KRAFTWERK UNION AG PROPRIETARY INFORMATION.

b)

Use of blocked out areas by cross hatch bands in the report text and figures/tables, e.g.

i)...." with'a mass flow density oflk~~WKg/m2s...";

ii)

%%%~ mm iii)...." should be kept below ~g rWr. atm."

Wr, 8/17/78

Topic:

Philippsburg 1 nuclear power plant List of test parameters and most important measurement results of the non-nuclear hot tests with the pressure relief system

Reference:

KKP I Number Karlstein 2 Au ust 1977 P ace, ate Hoffmann Schmid Au ors R 521 337 R 521 328 Dept.

Tel 2

s/

C ass'zgnature c asszfier R 521-Hff 1551-150 005 File no.

Summary:

This report contains a summary of the most important measurement results of the non-nuclear hot tests with the pressure relief system in the Philippsburg I nuclear power plant (KKP I).

I The results are presented in the form of Tables and graphs.

The content of those documents are briefly described.

In particular, the following subjects are discussed:

- test parameters

- behavior of safety/relief valves

- pressure load on the structures, of the suppression chamber

- loads on the structures of the pressure relief system.

A complete compilation of the instrumentation diagrams is not included.

Reference is made to the Test Specification /1/

for that.

The designations used for measurement points in this report correspond to that Test Specification.

s/

/s/

Countersigned Mitt Dr. Becker Distribution list ("z.K." ~

R 142 3x R 1 RF 14 lx R 14 R 52 lx R 5 R 521 4x R 522 R 523 Kraftwerk Union Author's signature Hoffmann Schmid Summary for info onlyl):

z.K.

z.K.

z.K.

z.K.

z.K.

19-1

Brief descri tion of contents

1. Abbreviations used German Enzlish DES dyne KK KKP I lfd. Nr.

max ~

PA Nr.

S u.

EV USUS PSS dyne SC KKP I No.

max.

SRV ISAP PV Pressure suppression system Pressure relief system dynamic Relief pilot valve Suppression chamber Philippsburg I nuclear power plant Number maximum-Test instruction no.

Reactor pressure vessel Safety/relief valve Safety pilot valve Independent Safety and Accident System Pilot valve pun/m 19-2

I I

I I

2. Introduction In accordance with the goals set in the Test Specification /1/,

primary emphasis in the KKB non-nuclear hot test was on pre-operational testing of the behavior of the

SRV,

- the behavior of the components of the pressure relief syst'm, the magnitude and distribution of pressures in the suppression chamber.

The test results relevant to these subjects are discussed separately in the following Sections.

Comments are made only when necessary to understand the~Tables

'and Figures.

3. Test arameters We shall dispense here with a detailed description of the test arrangement and instrumentation, which. are reported upon at length in /1/.

The overall arrangement of the pressure relief system inside the pressure suppression system is shown in Fig. 1.

The arrangement, of the 8

SRV and the blowdown quenchers A-H in the suppression chamber is shown in Figure 2.

The most important measurement transmitters for evaluating the pressure relief system and their exact positions can be seen in Figures 3 and 4.

Those Figures show the pressure relief system with blowdown quencher F on the 260'eridian, on which most of the blowdown d

tests were concentrated.

For further identification of the measurement transmitters and their positions, we refer here once again to the Test Specification /1/.

19"3

I l

I

A complete list of. the test parameters is given in Tables 1-7.

They include the relevant parameters for the blowdown tests:

- blowing SRV and quenchers,

- type of actuation, liquid level in blowdown pipe before beginning of test, K

- pool temperature before beginning of test.,

- test duration,

- reactor overpressure at beginning and after end of test, liquid level in suppression

chamber,

- liquid level in RPV before beginning of test,

- steady-state flow rate.

4. Behavior of safet /relief valves In order that the pressure in the RPV not rise impermissibly, e.g., in the event of a failure of the main heat sink, the valve opening time of the SRV may not exceed 1000 ms with an additional dead time of 500 ms.

Figure 5 shows diagrammatically the definition of all dead times and opening times of the pilot valves and SRV.

4.1 Dead and opening times of the safetggrelief valves Listed in Tables 8 - 14 are the results of the vent clearing tests at ca.

70 bar reactor pressure for SRV "A - H", divided according to the excitation of the SRV by relief ilot valve or safet ilot valve and also relief ilot valve and safet A comprehensive survey of the measured valve times is given in

, 19-4

I

Table 15. Figure 6 exhibits these results once again with respect to the scatter of the valve opening times for valves B, D, F, H

and the excitation by means of 1 pilot valve or 2 pilot valves.

4.2 Typical lift)time variations Figure 7 shows a comparison of theoretical and hypothetical lift/time varia'tions with measured opening characteristics.

Besides the lift/time variation determined computationally by the manufactuier of the SRV, the idealized variation used for precalculations and the variation assumed for extreme hypo-thetical accident conditions (jamming valve),

we have also drawn in three of the lift/time variations that were measured in the vent clearing tests and which are representative of the following cases:

- quick-opening valve (test 19 2),

- normal-opening valve (test 18),

slow-opening valve (test

28).

By selecting the quickest and slowest of the measured lift'/time variations, we simultaneously get the upper and lower envelopes for the experimentally determined opening characteristics.

4.,3 Flow rate of SRV Table 16 is a comparison of the required total flow rates during the valve opening phase and the total flow rates determined rom the discharge coefficients (eC values, Figure

8) in accordance with the lift/time variations.

One representative test each 4

was selected for valves B, D, E, F,

G, and H.

According to 19-5

I I

that, the actual steam flow rates are higher than the required values.

Figures 9 and 10 show two supplementary examples of measured lift/time variations and the corresponding flow rate/time variations based on the oC calculations, with which the required and the specified flow rate/time variations are compared.

5.

Load on the structures of the su ression chamber The pressure values indicated in Tables 17 - 31 represent maximum values of the measured dynamic pressures during 'the vent clearing phase.

The following subdivision was made:

- Pressures in 2604 meridian in Tables 17 - 19,

'- Pressures in 244 meridian in Tables 20 - 22,

- Pressures at periphery of the conical bottom in Tab)es 23 - 25/

- Pressures at periphery of spherical shell in Tables 26 - 28,

- Pressures at the inner cylinder in Tables 29 - 31.

To clarify the pressure distributions in the meridian cross-section at 260', Figures ll - 14 show representative examples for the different types of tests:

Figure 11 Distribution during vent clearing with quencher F at a reactor pressure of ca.

50 bar.-

Figure 12 Distribution during vent clearing with only one f

quencher (F), with two adjacent quenchers (F,G) and three adjacent quenchers (E,F,G) at a reactor pressure.

of ca.

70 bar.

19-6

I

Figure 13 Distribution during vent clearing with three adjacent quenchers (E,F,G) and reactor pressures of ca.

45 bar and 70 bar.

Figure 14 Distribution during the vent clearing phases of an interval test with quencher F.

Figure 15 shows the measured circumferential distribution of the bottom pressures.

It turns out that the 1/R circumferential distribution, based on the specified value of QQ bar for nodal rm response of the ressur p

e relief system, represents an upper enve-lope for all KKP I blowdown tests.

6. Load on the structures of the relief s stem For conversion of the strains measured at the various components of the pressure relief system into stresses and forces, the appropriate conversion factors for the individual measurement points are listed in Table 32.

The strains indicated in Tables 33-42 (and stresses or forces) represent the maximum values measured during the vent clearing p

The strains and stresses at measurement points DMS 15/16 phases.

The s

and DMS 17llB ar e an exception.

Those values are correlated in time with the corresponding vent-clearing pressures.

Tables 33-36 contain the measured dynamic strains, stresses and deflections of the blowdown pipe and cladding tube.

Tables 37-40 contain the measured dynamic strains, stresses and deflelections of the perforated>>pipe quencher and bottom mount.

19-7

Tables 41 and 42 contain the measured dynamic strains and forces in the struts of the cladding tube.

7. References

/1/ KKP I extension Hot test: Specification for the tests of the relief valves and the emergency cooling and suppression chamber cooling systems.

Revision 3 of 1 September 1976 19-8

I

KEY FOR TABLES 1 -

7 KKP I HOT TEST, Test Phase II (blowdown tests)

- Operating Log-Status:

1/26/77 1.

Test PA No.

Running no.

(PA ~ Test Instructions]

2. Date 3 ~ Time

4. Relief valve no.

5. Actuation EVV ~ relief pilot valve SVV ~ safety pilot valve

6. Liquid level in blowdown pipe 4)

(>>m water column)

7. Temperature in suppression chamber before beginning

8. Test duration

9. Reactor pressure 1) rel PR Beginning End

10. Liquid level in suppression chamber ll. Liquid level in RPV before beginning

12. Flow rate, valve no.

B+C A+8 F+G D+E (t ~ 1000 kg3 Leg 1 Leg 2 Leg 3 Leg 4

13.

Remarks 14 '

) Entered reactor pressures were read off from the digital indication on the control panel immediately before and after test.

2) Flow rate determination by measurements of K values

3) Interval test

4) rc ~ zeal conditions, cc ~ clean 'conditions

5) Valves E and G beginning on 9/26/76 with swing check valve in control line of Independent Safety and Accidient System.

19-9

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KRAFTNERK UNION AG PROPRIETARY INFORMATION Table.

KeY for tables 8-14 19-17

KRAFTERK UNION AG PROPRIETARY INFORMATION

-8 through 15 Table.......

19-18 through 25

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KRAFTNERK UNION AG PROPRIETARY INFORMATION Table Key for table 15 19-26

KRAFTNERK UNION AG PROPRIETARY INFORMATION j.6 tnrougn 31 Table...;...19-227 through 42

a

KKP I HOT TEST, test phase II (blocydowl ~

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Conver))).on factors for measurement pol" s in relief system Status 12.8.76 KWU R 521 KKP I - HEISSTEST, Testphose ll (Abbtaseversuche

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[SEE NEXT PAGE FOR KEY)

l

KEY FOR TABLE 32 Components of relief system

2. Blowdown pipe

3. Cladding (protective) tube

4. Blowdown pipe

5. Perforated-pipe quencher

6. Bottom mount

7. Struts of cladding tube

8. Measurement point

9. Measurement task

10. Relative displacement in X-direction between blowdown pipe and cladding tube 1.

N Y

N 1

12.

N 8

N

13. Bending stress in X-direction 14.

N Y

N N

15. Bending stress in X-direction 16.

Y N

17. Longitudinal stress in 2-direction

18. Bending stress in X-direction 19.

N Y

N N

20. Longitudinal stress in 2-direction

21. Circumferential stress

22. Bending stress on quencher arm 1 in X-direction N

1 N

N N

2 N

X N

N

23. Shear stress

24. Total stress in middle reinforcement rib of conical bottom

25. Relative motion of conical bottom relative to concrete

26. Forces in strut 1 of cladding-tube bracing

27. Conversion from.... into 28.

Measurement value in

29. Evaluation in 19-44

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KRAFTNERK UNION AG PROPRIETARY INFORMATION l9-45

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KRAFTNERK UNION AG PROPRIETARY INFORMATION

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KRAFTNERK UNION AG PROPRIETARY INFORMATION Table.

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KRAFTNERK UNION AG PROPRIETARY INFORMATION Table.....38 through 42 l9-48 through 50

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Figure 1

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KEY FOR FIGURE 1 1.

Top spray line

2. Erection opening

3. Main-steam line 4.

RPV with internals

5. Infection system

6. Catwalk

7. Annular gap

8. Insulation

9. Biological shield

10. Inner cylinder

11. Suction line 12, Feedwater line

13. Foundation

14. In-core instrumentation line

15. Bottom extension

16. Erection machine 17.

Scr'am system 18.

19.

20.

21.

22.

23.

24.

25.

26.

27.

28.

29.

30.

31.

32

'3.

34

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36.

37.

38.

39

'0.

Refuelling hatch cover Ventilation duct Drywell spray line Upper annulus Missile protection, concrete Suppression chamber spray line Suppression chamber (air space)

Vent pipes Outer shell Suppression chamber cooling line Vent pipe bracing Suppression chamber (water space)

Relief system with quencher Containment Suction line Lower annulus Axial-flow pump Control rod drives Scram line Personnel airlock Emergency airlock Outer shell with airlock Airlock mechanism 19-52

t

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KEY: 1. Concrete-free zones

2. Concrete support KKP I Hei f3test, Abblaseversuche

. Anordnung der. AbbtasedCIsen in der

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5 5

t

DEFINITION OF VALVE OPENING TIMES AND DEAD TIMES Zei tachse Time axis CO P'

yes t

5 totl t2 t3 tl+t3 t4 ges

,(1)

(2)

Electrical actuation Dead time, pilot valve Opening time, pilot valve Dead time, safety/relief valve Total dead time Half"opening time, safety/relief valve (lift 0<<35 mm)

~

Opening time, safety/relief valve Total opening time (ti+tg+t5)

Liftbehavior, pilot valve Lift behavior, safety/relief valve Figure 5

19-56

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KRAFTWERK UNION, AG PROPRIETARY INFOMCATION Figure.

6 through 15, 19-57 through 66,

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