ML20091C873
| ML20091C873 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 06/26/1991 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20091C868 | List: |
| References | |
| NUDOCS 9108070267 | |
| Download: ML20091C873 (3) | |
Text
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i NUCLEAR REGULATORY COMMISSION
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S A f E 7 Y E V At U,AT,10N,,B,Y,,Tp,E,,0 FF lf,E, Of_ pp,C L E AR, R,E A,C,T,0,0, REGPL A,T 1,0N SUFFCLT1l:G Al'Ef!D! TENT tiO.13910 FACILITV OPERATil1G t ICENSE NO. DPP-H EVALUATIO!! Of NRC GENERIC LE1TER 88-01 RESPONSE COST 0!l ED150tl COMPANY PILGR1li ilVCl. EAR POWER STAT 10td DOCKET NO. 50-293 1.0 1!JTRODUCTION R
Ey letters dated Tcbruary 5,)19P5, April 10, and June13, 1991, the Poston Edison Company (the licensee requested an an;endnent to f acility Operating iiconse t'o. OFF 35 for the Pilgrim liuclear power Station.
The proposed arrend-
- ment would change the Technical Specifications by imposing a new limit of 2 GP!1 incretst, average over any 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period, of reactor coolant lealage into the prini-y cct taintment f rom unidentified sources. The limiting condition for operaiion (LCO) would apply only when the reactor has been in the Pl!N node for r et e
'en 24 hcurs. Itore specific crerational requirements are also proposed for t.e reactor coolant leatece detection system and the reactor pressure boundary led detection systcm to account for the redundancy of the components within subsysters.
The NPC staff did cci cor.pletc action en the amendment requtst pending the develep crt of a reviscd staff position rcgarding the IGSCC problems as provided in Cereric Letter (GL)BP-01.
Bosten Edison Cornpany, the licensee subniitted its responses to liPC Ceneric Letter (GL) P8-01, " HEC 00sition on 1GSCC in BWR Austenitic Stainless Steel Piping" f or the Pilgrim t;uclear Pover Station ty letters dated August 4,1900, and June 19, 1989. GL PB-01 requested licensees and construction pernit holders to resolve the (105CC) issue for BWR piping mace of austenitic stainless steel thet is 4 inches or larger in nominal dieneter and contains reactor coolent at a teria ature ateve 200' Fahrenheit during power operation, regardless of Code classification.
The licensee was requested to address the following:
1.
Their cerrent p hrs regarding pipe replacement and/or other measures taken to n.itigate IGSCC and to provide assurance of continued long tern integrity and teliability of the subject piping.
2.
Their Inservice Inspection (1S1) Program as required by GL 08-01, to be implen4nted at the not refueling outage for austenitic stainless steci piping, and that conferrs to the staff positions on inspection schedules, In1Lods er d persont el and sample expansion.
3.
A trcrosed Tectnical SN cificatiot chenge to include a statement, in the sertion cr 151, that the 151 Progran for piping covered ty the sto of this letter will follou staff positions on schtdule, r>ethods and personnel, letter scr;le expansinn in CL B0 01 (See rodel BUC Sterdard Technical Specifications enclosed in GL 88-01).
It is reccgni20d that the Inservice Inspection and 9100070P67 910729 PDR ADUCK 05000290 P
. i Testing sections regarding these welds may be removed from the Technical Specifications through the TS improvement program.
In this case, this requirement wo11d remain with the 151 section when it is removed to an alternative do;ument.
4 Confirmation of plans to ensure tiat the Technical Specifications related to leakage detection will be in conformance with the staff positions on icd detection included in GL 88-01.
5.
Their plans to r.otify the NRC, in accordance with 10 CFR 50.55a(g), of any identified flaws that do not rneet the 1KB-3500 criterie of Section XI of tte Code in regard to continued operation without evaluation of the flaw, J
or a changt found in the condition of welds previously known to be cracked.
Such r.otification should include evaluation of the flaw, justification for continued opetatio0 and/or your repair plans.
2.0, EVALUATION The-licer.see's response to GL BP-01 has becn reviewcd by the-staff with thc l
assistance of its contractor, Viling Systems International (VSI). The staff reviewed Technical Evaluetion Report (TER) VSI's evaluation of the licensee's t espt se to GL EF-01.
The staff review of the TER concurred with the evoluaticos, conclusicis, and recorsendations centained in the TER with some exception:
1.
The licensee's position to exclude from the scope of applicability of GL 88-01, the welds in the pcrtion of the RKCU piping outboard of the isolation valves. As e mininun.the licensee should prepare an inspection plan of the RFCU piping outbeard of the isolation vbives on a sempling basis with justification.
2.
The licensee's position on sar+ple expansion does not comply with the requirements in GL 88-01.
3.
The licensee's position not to anend the Technical Specification (TS) to includc ct; 151 stattnent as required in GL 88-01.
In' a suppletant61 response to these issues dated-November 15, 1990, the licensee agreed to-perforn an inspection of 10r of the 67 non-safety related RWCU piping wcids c'uring tach iefucing tycle.
If a flaw is discovered and 105C0 is deter-minec' as the prot,able ceute, another 101 will be inspected.
If.an IGSCC induced flew is discovered in the second sar:ple, plans will be made to replace PWCU and non-code'pipirs in subsequent refueling outages. Additionally, the licensee will revise tteit tugrented inspection program to reflect the sample expansion guidance of the ger4ric letter which is acceptable to the staff, finally, the Technical Spu ificatiorc(hange subnittel of Februaiy 4, 19FE, is acceptable to the stafi es ir: confernence with GL 88-01 for leakage rionitoring.
L The licensee interin, revisions to their Augmented Inspection prograr, to. include sinte W s of contiiance witt CL 82-01 Inition on schec'ule, riethods and
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pcrstml n will as the corriticent nn TVCU welds instection and sertple expantion i
is arfeptable to the staff.
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3 The staff has re. evaluated the frequency of leakage nionitorirg. After discussion with several CWR licensees the staff concluded that cionitoring every four hours i
ciectes an unnecessary adniinistrative hardship on the plant operators.
Therefore, 4
t the staff takes exception to the TER recormendation and considers the licensee's position to nionitor unidentified leakage every eight hours acceptable, 3.0- STATE CONSULTATION in accordance with the Cornmission's regulations, the Massachusou. State office ?
was notified of the proposed issuance of the an>endment. The State official had no t
corrents.
4.0 E W100NPENTAL CONSIDERATION This ernendn+ni chenges a requirtn4ent with respect to installation or use of a
- fic dity tot 4cra nt locate r within the t est ricit d area as defined in 10 CFR part 20.
The Nr.C staff has deterrined that the atendnent involves no significent increase in the an:ounts, and no significant change in the types, of any effluents that (nay be i
released of f site, and that ther e is no significant increase in individual or cumu-lative occupational radiction exposure.
The Corwission has previously pbblished a_ proiosed findirts that the an,endrent inyches no significant barards consideration
- and +1 a c i t s. been r>0 sutlic cou ent or, such finding (50 Ek 17137). Accordingly, tMs intt tt:ent r,eots 11e eligibility criterie for categorical exclusion set forth in 10 CFR 51.72(c)(9). Put svant to 10 CfR 51.??(b), no environn. ental irrpact state-rnent or envitermental tssessnent need be prepared in connection with the issuance (f this arendment.
E.C 00hC Lls,1,0,ff i
The Ccertission has tcncludec:, besed on the considerations discussed above, that:
(l) ticre is reascretle assurante that the health and safet not be endangered by operation in the proposed n.anner, (?) y of the public will such activitics will be corducted.in conpliar te with the Coratission's regulations, and (3) the issuance of this trar dner t-will r.ct be ininiital to the comraon defense and security or to the h(alth er d sefety of the public.
- Principal-Con'ributor:
Willian: H. Koo Dated:
June ?f, 1991
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