ML20044C516
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10/12/88 MEMORANDUM FOR:
Ebe C.
McCabe, Chief, Reactor Projects Section 1B, PB 1, DRP FROM:
Willi am J.
Raymond, SRI, Millstone 1, 2&3, PB 1.
DRP ALLEGATION 88-40 [FURTHER INFORMATION FROM
SUBJECT:
9: 20 a. m) on 10/11/88 to provide further Q
c al l ed me at information on previous concerns and to discuss new concerns involving issues that were previously addressed wit,h the licensee but were not satisf actoril y resolved.
1.
Hydrocen Builduo in Waste Gas Di scharoe Header h/f y Q SQ 'was assigned to perform a calibration in 1986 on ractation channel 9095, which monitors the waste gas discharge header.
After i sol ati ng the moni tor from the header and while injecting the test radioactive gas, a small hydrogen detonation occurred insice the sample flow path within the instrument cabinet on the -25 ft. el of the auxiliary building.
Although no equipment damage occurred, the occurrence was significant because (i) it demonstrated a hydrogen control problem existed in either unit 2 vent gas header or in the interface with unit I on the discharge path to the stack; and (i i ) the potential for more adverse consecuences existed.
The occurrence was di scussed with ILC supervision and plant management.
Actions were taken to add a caution to the I&C calibration procedure and to add a recutrement in an operatic s procedure to purge the header prior to the ILC calibrations.
.has not performed the RM 9095 calibratton since 1986.
rdoes not know if subsequent detonations have occurred, but he f eels that the potential is still there and that the actions to date have not addressed the root cause of the hydrogen buildup / leakage.
2.
SJAE Radiation Monitor (RM 5099) Non-Representative Samples rovided further informataon on this issue that was first addressed in my 10/7 memorandum (item 2). #6]
concern on whether the radiat2 cn monitor provides representative indication of SJAE radioactivity is based on the repair history for the monitor.
The monitor malf unctions af ter each plant trip aid chemistry because the sample lines flood out.
i t speatedly submit trouble reports on the monitor for personnel
" repair" after finding that the monitor does not show increases in radioactiv2ty when it exists (due to fuel leaks) as shown by 9303230247 921217 PDR FOIA HUBBARD92-162 PDR
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I analysis of chemistry samples.
said the system has received management at t en ti on and design changes have been made to reduce the moisture problem.
- However, believes further design changes are needed to rolocate the sample line tap off point closer to the condenser on the air ejector discharge, which is where the local chemi stry sample point is located.
My review of Unit 2 tech. specs. 3.3.3.9 shows that either the SJAE or the steam generator blowdown radiation monitors is required to be operable as an LCO to i sol ate the steam generator blowdown in the event of tube leak.
3.
Supervisory Revi ew of Comp!eted Test Results
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$Nh reviewed and signed in April the SH. - + lt surveillance test f or the i ncore-ex core cali bration he di d under protest st 5.'*/. F P February 22. 1988. f alleces the supervi sor revi ewec the test results atter.
{ % first came to the NRC about his concern on April 21, but signed off _the form as though the review was done on 3/31/88.
(,Q g g $ $ tased hi s concl usi on on his discovery that the completed surveillance form was missing from the official record fil e on April 21, but was recently discovered in the file.
__.)
l W.
J.
RAYMOND 10/12/GB
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(Leave blanQ 23 ALLEGATION RECEIDT REPORT R
ALLEGER INFORv.1*ICN -
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Em;leye : tb2THEAST oviiT1ES Materials License No.
1.
If applicaole, was tne DD; eclicy explainec : trie alleger?
YES NO N/A /
Was a Cer'i:e t a' re A:-eems.
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t Type of Regulatec A tiv :y:
_Y, (a) Reactor (d) Safeguards (c) ten or
_ (e) Other:
] (c) Materials
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Upecify) e) Emergency Preparedness Functional Area (s):
j (a) Operatiers
,_ ((f) Onsite Health & Safety (b) Construction (c) Safeguards
,_ (g) Of f site Health & Saf ety
_ (d) Transportation
,_ (h) Other:
Date/ Time Re:eived:
10 1 38
/ 97N d
Employee Receiving Aliegation:
CPAg@ I SEI e MILLSTcOE NRC Region I cre 207 Ir, formation in this record was de;e:ed (Revised Nove, der 1957) 8n 2':0: dance wdh the freedom of Information A:t exem tions Nf 7~ C lI F014
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