ML20128M551

Forwards Addl Info Re Type C Testing of Containment Penetrations,Per Request for Addl Info Q 480.33

ML20128M551
Person / Time
Site:	Vogtle
Issue date:	05/21/1985
From:	Bailey J GEORGIA POWER CO.
To:	Adensam E Office of Nuclear Reactor Regulation
References
GN-624, NUDOCS 8506030006
Download: ML20128M551 (5)

Text

p-5, 99: .. . _

~

. Georgia Power Company

- Rout 3 2. Box 299A W  ! Waynesboro, Georgia 30830 Telephone 404 554 9961,

~ - 404 724-8114 Southern Company Services,Inc.

, Post Office Box 2625 --

G  ; Birmingham, Alabama 35202 .

Telephone 205 870-6011 -

VogtleProject May 21, 1985 Director of.. Nuclear Reactor Regulation: Log: GN-624 Attention:' Ms. E. G. Adensaa ' File : X6BK10 Licensing Branch No. 4 -

'-- Division of Licensing

.U.S. Nuclear-Regulatory Commission

1. Washington, D.C.- 20555

- NRC DOCKET. NUMBERS 50-424 AND 50-425 CONSTRUCTION PERMIT NUMBERS CPPR-108 AND CPPR-109 V0GTLE ELECTRIC GENERATING PLANT - UNITS 1 AND 2 Request for' Additional Information - Q 480.33

Dear Mr. Denton:

Your staff requested additional information on Type C testing of containment penetrations. Enclosed.for your review is the requested

'information.-

If'yourista'ff requires additional information, please do not hesitate to ,

contact me.-

->s Sincerely,4 .

.&. - - Au -

J. A.-Bailey-Project Licensing Manager a

e 1e JAB / map _

Enclosure

-: xc : D. 0.- Foster R. A. Thomas-J. A. Joiner, Esquire -

B. W. Churchill, Esquire M.'A. Miller B. Jones, Esquire (w/o enclosure)

L. T. Cucwa.

G. Bockhold, Jr.

l T. Johnson (w/o enclosure)

T. C. Teper (w/o enclosure) i L. Fowler Vogtle Project File } i g6oggo{t 'Shg c

A

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VEGP-FSAR-Q Question 480.33 FSAR paragraph 6.2.6.3 states that type C testing of the safety injection lines, containment spray lines, and long term N-- recirculation lines will not be done on the basis that these lines are water sealed. Additional justification is needed for the elimination of type C tests (note that table 6.2.4-1 indicates type C testing for the spray lines):

A. For each line, discuss and justify that a sufficient N-- water inventory will be available for at least 30 days following a loss-of-coolant accident (LOCA).

B. For each line, discuss your plans for hydrostatically testing the valves to show that water leakage from the isolation valves is compatible with the 30-day inventory requirement. The leakage limits for these valves should be included in the plant Technical Specifications.

C. FSAR paragraph 6.2.6.3 states that the isolation valves in the charging line of the chemical apd volume control system are type C tested using water. IType C testing using water as the test fluid is permissible only if it can be shown that parts A and B above are satisfied.

and are part ef c.(osed sys4em Response cuisicle e.cnta;nment oewebrati Nee b;nmed ThelinesAwkichpenetrat; containm:nt :nd #are required to perform a cafeguard function following an accident ar not Type C tested. Zach of these lines is equipped with isolation valves that can be actuated by the operator from the control room.

Lines whic,'. fui. into this category are:

A. Safety injection pump discharge lines (penetrations 30, 9 31, and 33).

B. Residual heat removal pump discharge lines (penetrations 56, 57, and 58).

C. Centrifugal charging pump cold leg injection path s, (penetration 32).

D. Cent-n =ent spr=1 p" r A4--h=rs

'"-- 'menctr2tica: 21 __

and 22).

L Amend. 8 7/84 Q480.33-1 Amend. 9 8/84

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l 1

VEGP-FSAR-Q

h. Containment emergency sump lines to the residual heat removal and containment spray pumps suction (penetrations 36 through 39).

E Residual heat removal pump hot leg suction lines f.

(penetrations 59 and 60).

Bec. nase 4he log 4eem su p re cirm 6%

Safety injection, residual heat removal, r ^-t ri..-c.;c.y;pr;;, - and high head safety injection portions of the chemical and volume control system are closed systems outside the containment, designed and constructed to ASME III, Class 2, and Seismic Category 1 requirements g The above systems are operated and inspected during normal plant operation to ensure that the integrity is maintained. J. ;inplc ::tive f ilurc can bc -

_ - s_ _s -

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The reactor coolant pump seal water injection lines  ;

(penetrations 51 through 54) are not required to perform a 9 l

safety function during an accident. However, due to the i sensitive nature of the seals, it is highly desirable to provide seal flow at all times. The charging pumps are used for high-i head safety injection, and flow will be provided by these pumps e I through the seal injection lines following an accident. In b addition, the system is designed, constructed, and maintained tc>

qualify as a closed system outside the containment. Each.line is equipped with a remote manual containment isolation valve which the operator can close if required.

The isolation valves in the above lines are either normally open at the time of an accident or are opened at some time aft r *h accident to effect immediate and long term core cooling u ce+ * *

% .cm- wy,- 34.-- -__ ,_4..w. ...-e,4y + . _4 , 4 90 3 3

-- --..-m._

qi g z. , c _ rper2tirr, 2ither frc_ the

- '=' 4 g water etern;; t:n': ;; f ;r th; ;;c.;;inm;at ;m;rg ncy-

- - = - a--= = 2% Ae et-p -fid; ; ;;;dit;; p. h for i ;;hange-- o f-

• '- ---tnin nt tr :phere.

ab e 6.2.4-1 and subsection 6.2.6 $ i%c revised -iL Mer.dmc. #

o reflect the above discussionr and fo inchcatc:. that tha cowta;mt spray edi.s< L eg e. L'oe valves (penett44 ion y W SS) e e. +ype. C tdsfed, i

t

[tbe clo hoi consh P a potenkial cony 4Mmend abos Pd cluck 3 or fodowig cm acc.ident with a.c. f N o.o ring

-fo;(ure. o f ct sydem <omponeni.

Q480.33-2 Amend. 9 S/94

INSERT TO 480.33 Valves which are closed initially or closed at some time following a loss-of-coolant accident are positioned to effect proper system operation and not to effect a barrier against release of containment atmosphere.

Should the valves leak slightly when closed, the fluid seal within the pipe or the closed piping system outs:,de the containment would preclude release of containment atmosphere to the environs as discussed further below for each penetration.

,is clo.s<.d dmq /u/ /eg recircuk/en nwde. (4/ /tu /de Vs/n h c/ssed C

eg. Valve HV-8835 (Penetration 30) is a power lopkout open valve and9 c, * -__,__-___2..,__ n __;__ _,___.___,... ,. . ___34 . ...4_.,

die __ .x , if th xin ;n n '._ 1;n d n _, .1_ __ l __ _ ;i.,. T)-

f., ,__1_2 ~ " _1 , 1^^1., eitheg,one of the safety injection pumps,will maintain an inward actiWR head of water on the valvef uof fWh'es vn/res Hf as2t A ma'//V-JJZI B an closed.

The source of water is the refueling water storage tank (RWST) during the injection mode and from the containment emergency sumps during the recirculation mode.'___ 1..n 5.3." 1, _'.__: M . Gen if Me Va/d WA.c /olesk s/J6/f w4sq c/osed anc/ Vo/res W-652/4 */c/8 en chsed, ide c/osed.s s/em ou/. side WahmM/ wouMpec/ vale re/eare o coe/onmedofanpdesc ld /de M n'r o/Ls' (Set ffjutt 4.3*2-1 ,3 bit $ I)*

po e /xtout e Valves HV-8802 A and B (Penetrations 31 and 33) are __-- -"; closed valves and are opened during the long term hot leg recirculation mode. When the valves are closed either one of the safety injection pumps will maintain an inward acting head of water on the valves (see Figure 6.3.2-1, sheet 3),

on boM s/de5 o#

e Valves HV-8801 A and B (Penetration 32) are normally closed valves that are autcmatically open on receipt of a safety njection signal and remain open during all modes of emergency core ooling. If one of the valves fails to open, either one of the can rifugal char::ing pumps will maintain an inward acting head of water the valve.

The source of water is from the RWST during the injection mode and from the containment emergency sumps during the recirculation mode (see Figure 6.3.2-1 sheet 1). .

e Valves HV-8811 A and B and HV-9002 A and B (Penetrations 36 through

39) are normally closed valves and are opened during the recirculation mode. When the valves are closed a water seal is provided by water f rom the RWST (outside containment during the injection mode and from the emergency sumps (inside containment) during the recirculation mode. These valves are enclosed in encapsulation vessels which are an extension of the containment boundary. The encapsulation vessels are Type B tested as discussed in paragraph 6.2.6.2 (see Figures 5.4.7-1 and 6.2.2-3).

l e Valve HV-8840 (Penetration 56) is a/bwer 1- /oeKMt;

- closed valve a/hni nd is opened during hot les recirculation mode. When the valve is closed either one of the residual heat removal (RHR) pumps will maintain,ap__,g inward acting head of water on the valve except.when valve HV-d716 A (train A) and/or valve HV-8716 B (train B) are closed and the opposite train RHR pump is not running. The source of water is from the RWST during the injection mode and from the containment emergency sumps during the recirculation uode. Even if the valve was to leak slightly when closed and valve HV-8716 A and/or valve HV-8716 B are closed and the opposite train RHR pump is not running,

r. the closed RHR system outside containment would preclude release of containment atmosphere to the environs (see Figures 6.3.2-1, sheet 3

- gnd 5.4.7-1).

• ;e

}. --

Powen. Lecoon e Valves,HV-8809 A and B (Penetrations 57 and 58) are4;;; 117 opened valves and are closed during hot les recirculation mode. When the valves are closed either one of the RHR pumps will maintain an inward acting head of water on the valves except when valve HV-8716 A and/or valve HV-8716 B are closed and the same train RHR pump as the closed valve HV-8809 A or B iJ not running. As discussed above, the closed RHR system outside containment would preclude the release of containment atmosphere to the environs (see Figures 6.3.2-1, sheet 3 and 5.4.7-1).

e Valves HV-8701 A and HV-8702 A (Penetrations 59 and 60) are normally closed and remain closed during the injection and recirculation modes. If these valves were to leak slightly, the RHR pumps would pumptheleakagebackintothecontainment/andtheclosedRHR system would preclude any release to the environs (see Figure 5.4.7-1).

The' valve stems are not a potential containment atmosphere leak' path wh'en the valves are closed for one of the following reasons:

o the valve stes leak-off connection is capped.(PepeTR Anou s 20,Jl,32. Aso 73) e the valve is enclosed in an encapsulation vesset.(Surt/tAnous M,37,3 gyp Jg) e the valve stem leakage is routed to the recycle holdup tank which has a diaphragm. The space above the diaphragm is part of the negative pressure boundary and is continuously ventilated with the safety related piping penetration exhaust system (see Figure 9.3.4.2 and paragraph 9.4.3.2).

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