ML20083N424
| ML20083N424 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 01/28/1983 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE, YANKEE ATOMIC ELECTRIC CO. |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0452, RTR-NUREG-0737, RTR-NUREG-0800, RTR-NUREG-452, RTR-NUREG-737, RTR-NUREG-800, TASK-2.E.4.2, TASK-2.F.1, TASK-TM SBN-438, NUDOCS 8302010646 | |
| Download: ML20083N424 (6) | |
Text
{{#Wiki_filter:PENHI -= 1671 Worcasser Road Pub 5c Service of New Hampshire M a h. * * * "* 01701 (617) - 872 - 8100 January 28, 1983 SBN-438 T.F. B7.1.2 United States Nuclear Regulatory Commission Washington, D. C. 20555 Attention: Mr. George W. Knighton, Chief Licensing Branch No. 3 Division of Licensing
References:
(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 end 50-444
Subject:
Open Item Responses: (SRP 5.2.5 and 6.2.8; Auxiliary Systems Branch and Containment Systems Branch)
Dear Sir:
We have enclosed responses to the following open items which were discussed with representatives of the NRC Staff in meetings conducted on January 10-12, 1983 and January 26, 1983: NRC BRANCH SRP SECTION COMMENTS ASB 5.2.5 RCPB Leakage Detection CSB 6.2.8 NUREG-0737; (Item II.E.4.2) Containment Isolation Dependability CSB 6.2.8 NUREG-0737; (Item II.F.1.2) Containment Water Level The enclosed responses will be included in Amendment 49 to the OL Application. Very truly yours, YANKEE ATOMIC ELECTRIC COMPANY Ql J. DeVincentis Project Manager ALL/fsf cc: Atomic Saf2ty and Licensing Board Service List 8302010646 830128 l PDR ADOCK 05000 A l 1000 Elm St., P.O. Box 330, Manchester, NH 03105 Te:ephone (603) 669-4000 TWX 7102207595 l
ASLB SERVICE LIST Philip Ahrens, Esquire Assistant Attorney General Department of the Attorney General Augusta, ME 04333 Representative Beverly Hollingworth Coastal Chamber of Commerce 209 Winnacunnet Road Hampton, NH 03842 William S. Jordan, III, Esquire Harmon & Weiss 1725 I Street, N.W. Suite 506 Washington, DC 20006 E. Tupper Kinder, Esquire Assistant Attorney General Office of the Attorney General 208 State House Annex Concord, NH 03301 Robert A. Backus, Esquire 116 Lowell Street P.O. Box 516 Manchester, NH 03105 Edward J. McDermott, Esquire Sanders and McDermott Professional Association 408 Laf ayette Road Hampton, NH 03842 Jo Ann Shotwell, Esquire Assistant Attorney General Environmental Protection dureau Department of the Attorney General One Ashburton Place, 19th Floor l Boston, MA 02108 i 1 I f e _-,_v -. - _, --~+ y w - e ~ ~ n ~. 7 - - w -._ --. ~. -..,. - - -e
SRP 6.2.8, TMI Item II.E.4.2 The setpoint for containment isolation Phase A (Hi-1) is 5 psig. There is a 1.7 psig margin between the minimum setpoint and the maximum normal pressure. Hi-1 setpoint 5 psig 's -Channel accuracy allowance -1.8 psig N = Minimum Hi-1 setpoint 3.2 psig -Maximum normal containment -1.5 psig pre ssure = Margin 1.7 psig This is 0.7 psig more than the NUREG-0737 recommended margin of 1 psig. The additional margin is considered justified as the addition is small (less than 1/2 of the instrument channel allowance). In addition, the 5 psig setpoint is anindustry " standard" value and is also specified in the Standard Technical Specifications (NUREG 0452). I i l l r l \\ l
r SRP 5.2.5, RCPB Leakage Detection The following provides the accuracy, response time, and sensitivity of the Reactor Coolant Pressure Boundary leak detection methods that meet the guidance of Regulatory 1.5, position C.3: Response Time For Detection Method Accuracy 1 gpm leak Sensitivity Sump Level +0.5% <C1 Hr. 1 in. 10-10 ci/cc Containment Air +20% 401 Hr. p Particulate Activity Activity 4(1 Hr. 10-6 pCi/cc Containment Gaseous +20% i l l
SM G.6 8, M RemKOz SB 1 & 2 Amendment 45 FSAR June 1982 's / O indication / recording time constants. "Ih is results in a time (j constant o f 2. 3 sec ond s for indication and 3.2 seconds for 'Q recording. The adequacy of this response is justified in Exhibit 480.22-1. (o g% b. Containment Water Level Instrumentation ] (The five points shown below address the five clarification points of Page II.F.1-16 of NUREG-0737.) N -{J t-Q1. The Seabrook design for containment water level complies with O go this requirement. Refer to clarification 3. for a discussion t of the narrow range qualification. g., p t i v) g u t. tt s OX 2 n.: Indireted range 2 f 0-6 feet roe;"stely -^"ere t'e - kO -cr icu12 ted c272c ity c f 5':0,000 gallen: b r: th: (-)26 f:: U '9 o '[ti 4 oimoer me E @I 3. Narrow u. 66 wa tc r Icvc1 =orritore are previded 'a the centrin-rent drc~n ge er:p:- "-i: instrrrert?*iaa pre"id r t ^ ep;ra-h g) ter rite infer = tien en operatien21 le@2:e ineide the c^-trin-t q - ena 1. nne ..m,; .a en nno.,*o im e. e,-,ta or omo .m E:' g~ ~ *g . SCC mc esl
- .,1,.._..'ree:
_,,g e the i.,te t er R _m. no : s E "'PIC-0737 (cee clarific2 tion-L ) by estic fying the epaci-s3M O fication for the ner=21 eperating crviren= nt including enpceted ( >y$ /*/} nt# trenciente. Adequate deeign featerca ensurc continucu: cvail-V g ability cf this inntrecentatica during cperation. Oper bility l R O ( cf the instruncatatica is addrcsscd in the Tcchnic 1 Cp;;ifications I q)%&T h4J,g 4. This requirement is not applicable to Seabrook. D $ 'R O 5 The +5% accuracy of the wide range level monitors provided in s %Nk FSAR Table 7.5-1 is adequate for the intended function. Justi-3$d fication is provided as follows: JE 4) 2 i a. The accuracy results in a water capacity uncertainty of 'u g g C-approximately 27,000 gallons. o DW CNAQ b. The capacity of the RWST (between the Tech Spec limit
- k%,
and the Recire. Setpoint) is in excess of 325,000 gallons. h% Of this capacity, approximately 127,000 gallons would v) % O.E fill OPen cavities below (-)26 elevation, leaving a minimum
- r Ltf Q s
capacity of 198,000 gallons above the (-)26 elevation Q only considering the RWST capacity. In light of b., the uncertainty of a. will become negli-c. gible well before the recirculation phase is entered. RAI 480-13 M
a INSERT A The narrow range water level monitors are not required to operate after their respective sump has been flooded as their purpose is to monitor operational leakage. As their environment will not become harsh until after the sump is flooded, it is not necessary to qualified the equipment inside the containment for a harsh environment per IEEE 323-74 as endorsed by Regulatory Guide 1.89. The inside containment equipment has been selected based on the normal conditions inside the containment and these instruments will be inc.luded in the maintenance / surveillance program for equipment qualified for mild environments (see NUREG 0800, p. 3.11-5). The narrow range level instruments will be operable after a operating basis earthquake (OBE) as recommended by Regulatory Guide 1.45. l l l l}}